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Proper Job Building Cost Calculator

Compare building cost scenarios

compare_guide_scenarios

Compare GB/US Guide Price scenarios when the user explicitly asks to compare alternatives within those existing policies. Returns the original comparison card and deltas. For other countries or drawing-based refinements, use calculate_building_work with each requested scenario. No foreign-rate conversion or saved-project access.

Input Schema

NameRequiredDescriptionDefault
baselineYes
scenariosYes

Output Schema

NameRequiredDescriptionDefault
dataNo
errorNo
statusYes
schemaVersionYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changed
    • addedInput schema / properties / baseline / properties / scope / properties / vatTreatment
      Added value: +{
      +  "description": "Supplier-confirmed VAT treatment of the priced construction scope. Never infer zero/reduced rating from a project label or registration. Mixed-rate work stays unconfirmed until split; separate fees/goods may differ.",
      +  "enum": [
      +    "unconfirmed",
      +    "standard_20",
      +    "qualifying_conversion_5",
      +    "qualifying_empty_home_5",
      +    "qualifying_new_dwelling_0",
      +    "mixed"
      +  ],
      +  "type": "string"
      +}
    • addedInput schema / properties / scenarios / items / properties / changes / properties / vatTreatment
      Added value: +{
      +  "description": "Supplier-confirmed VAT treatment of the priced construction scope. Never infer zero/reduced rating from a project label or registration. Mixed-rate work stays unconfirmed until split; separate fees/goods may differ.",
      +  "enum": [
      +    "unconfirmed",
      +    "standard_20",
      +    "qualifying_conversion_5",
      +    "qualifying_empty_home_5",
      +    "qualifying_new_dwelling_0",
      +    "mixed"
      +  ],
      +  "type": "string"
      +}
  2. Changed16 schema fields changed
    • addedInput schema / properties / baseline / properties / scope / properties / additionalInternalWorkPackages / description
      Added value: +"Packages in existing rooms outside the main extension or loft. Kitchen work and Bathroom work use kitchenScope and bathroomScope to define the same room allowance and are counted once."
    • addedInput schema / properties / baseline / properties / scope / properties / additionalInternalWorksArea / description
      Added value: +"Total floor area of existing rooms affected outside the main extension or loft, in the supplied area unit."
    • addedInput schema / properties / baseline / properties / scope / properties / bathroomScope / description
      Added value: +"Bathroom work included anywhere in this project. If Bathroom work is also selected as an additional internal package, this scope defines that same bathroom allowance; do not describe it as a second bathroom."
    • addedInput schema / properties / baseline / properties / scope / properties / finishBand / description
      Added value: +"Finish specification: Builder grade is budget, Good domestic is a normal quality domestic finish, and Premium domestic is higher specification."
    • addedInput schema / properties / baseline / properties / scope / properties / includesAdditionalInternalWorks / description
      Added value: +"True only when the project also changes existing internal rooms outside the main extension or loft."
    • addedInput schema / properties / baseline / properties / scope / properties / kitchenScope / description
      Added value: +"Kitchen work included anywhere in this project. If Kitchen work is also selected as an additional internal package, this scope defines that same kitchen allowance; do not describe it as a second kitchen."
    • addedInput schema / properties / baseline / properties / scope / properties / propertyForm / description
      Added value: +"Existing property type. Use only the user's answer; do not infer it from the project type."
    • addedInput schema / properties / baseline / properties / scope / properties / scopeBand / description
      Added value: +"Breadth of work: Lean is a reduced scope, Balanced is a normal complete scope, and Expanded is a broader scope. This is not a confidence or risk setting."
    • addedInput schema / properties / scenarios / items / properties / changes / properties / additionalInternalWorkPackages / description
      Added value: +"Packages in existing rooms outside the main extension or loft. Kitchen work and Bathroom work use kitchenScope and bathroomScope to define the same room allowance and are counted once."
    • addedInput schema / properties / scenarios / items / properties / changes / properties / additionalInternalWorksArea / description
      Added value: +"Total floor area of existing rooms affected outside the main extension or loft, in the supplied area unit."
    • addedInput schema / properties / scenarios / items / properties / changes / properties / bathroomScope / description
      Added value: +"Bathroom work included anywhere in this project. If Bathroom work is also selected as an additional internal package, this scope defines that same bathroom allowance; do not describe it as a second bathroom."
    • addedInput schema / properties / scenarios / items / properties / changes / properties / finishBand / description
      Added value: +"Finish specification: Builder grade is budget, Good domestic is a normal quality domestic finish, and Premium domestic is higher specification."
    • addedInput schema / properties / scenarios / items / properties / changes / properties / includesAdditionalInternalWorks / description
      Added value: +"True only when the project also changes existing internal rooms outside the main extension or loft."
    • addedInput schema / properties / scenarios / items / properties / changes / properties / kitchenScope / description
      Added value: +"Kitchen work included anywhere in this project. If Kitchen work is also selected as an additional internal package, this scope defines that same kitchen allowance; do not describe it as a second kitchen."
    • addedInput schema / properties / scenarios / items / properties / changes / properties / propertyForm / description
      Added value: +"Existing property type. Use only the user's answer; do not infer it from the project type."
    • addedInput schema / properties / scenarios / items / properties / changes / properties / scopeBand / description
      Added value: +"Breadth of work: Lean is a reduced scope, Balanced is a normal complete scope, and Expanded is a broader scope. This is not a confidence or risk setting."
  3. Changed22 schema fields changed
    • changedInput schema / properties / baseline / properties / scope / properties / basementLightwellCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / baseline / properties / scope / properties / bedroomCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / baseline / properties / scope / properties / commercialKitchenetteCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / baseline / properties / scope / properties / commercialWashroomCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / baseline / properties / scope / properties / commercialWorkstationCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / baseline / properties / scope / properties / decoratingDoorCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / baseline / properties / scope / properties / decoratingWindowCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / baseline / properties / scope / properties / doorCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / baseline / properties / scope / properties / parkingSpaces / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / baseline / properties / scope / properties / roomCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / baseline / properties / scope / properties / windowCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / scenarios / items / properties / changes / properties / basementLightwellCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / scenarios / items / properties / changes / properties / bedroomCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / scenarios / items / properties / changes / properties / commercialKitchenetteCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / scenarios / items / properties / changes / properties / commercialWashroomCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / scenarios / items / properties / changes / properties / commercialWorkstationCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / scenarios / items / properties / changes / properties / decoratingDoorCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / scenarios / items / properties / changes / properties / decoratingWindowCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / scenarios / items / properties / changes / properties / doorCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / scenarios / items / properties / changes / properties / parkingSpaces / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / scenarios / items / properties / changes / properties / roomCount / minimum
      Previous value: --9007199254740991New value: +0
    • changedInput schema / properties / scenarios / items / properties / changes / properties / windowCount / minimum
      Previous value: --9007199254740991New value: +0
  4. Changed3 schema fields changed
    • removedOutput schema / properties / requestId
      Removed value: -{
      -  "type": "string"
      -}
    • addedOutput schema / properties / status / enum
      Added value: +[
      +  "complete",
      +  "needs_input",
      +  "failed"
      +]
    • changedOutput schema / required
      Previous value: -[
      -  "schemaVersion",
      -  "requestId",
      -  "status"
      -]New value: +[
      +  "schemaVersion",
      +  "status"
      +]
  5. Changed5 schema fields changed
    • addedInput schema / $schema
      Added value: +"http://json-schema.org/draft-07/schema#"
    • addedInput schema / additionalProperties
      Added value: +false
    • addedInput schema / properties / baseline
      Added value: +{
      +  "additionalProperties": false,
      +  "properties": {
      +    "country": {
      +      "description": "Country pricing policy. Use GB for Great Britain or US for the United States. If omitted, GB is used for backwards compatibility.",
      +      "enum": [
      +        "GB",
      +        "US"
      +      ],
      +      "type": "string"
      +    },
      +    "jobType": {
      +      "description": "Residential project type supported by the selected country policy.",
      +      "enum": [
      +        "Combined project",
      +        "Rear extension",
      +        "Kitchen extension",
      +        "Side extension",
      +        "Wraparound extension",
      +        "Loft conversion",
      +        "Barn conversion",
      +        "Refurbishment",
      +        "Commercial office refurbishment",
      +        "New kitchen",
      +        "New bathroom",
      +        "Office / summerhouse",
      +        "Garage conversion",
      +        "Basement work / conversion",
      +        "Lower-ground floor refurbishment",
      +        "New build",
      +        "home_addition",
      +        "whole_home_remodel",
      +        "kitchen_remodel",
      +        "bathroom_remodel",
      +        "attic_conversion",
      +        "garage_conversion",
      +        "basement_remodel",
      +        "backyard_studio",
      +        "new_home_construction"
      +      ],
      +      "type": "string"
      +    },
      +    "postcodeArea": {
      +      "description": "GB outward postcode only, for example BS3. Never send a full address.",
      +      "pattern": "^[A-Z]{1,2}\\d[A-Z\\d]?$",
      +      "type": "string"
      +    },
      +    "scope": {
      +      "additionalProperties": false,
      +      "default": {},
      +      "description": "Country-specific project scope. Use UK fields for GB and US fields for US; do not invent unanswered values.",
      +      "properties": {
      +        "access": {
      +          "enum": [
      +            "straightforward",
      +            "constrained",
      +            "remote"
      +          ],
      +          "type": "string"
      +        },
      +        "accessIssues": {
      +          "type": "boolean"
      +        },
      +        "additionalInternalWorkPackages": {
      +          "items": {
      +            "enum": [
      +              "Plastering",
      +              "Painting & decorating",
      +              "Wood / laminate flooring",
      +              "Kitchen work",
      +              "Bathroom work",
      +              "Windows / doors / glazing",
      +              "External walls / insulation",
      +              "General building / making good"
      +            ],
      +            "type": "string"
      +          },
      +          "maxItems": 12,
      +          "type": "array"
      +        },
      +        "additionalInternalWorksArea": {
      +          "minimum": 0,
      +          "type": "number"
      +        },
      +        "approximateSize": {
      +          "description": "Project floor area. Defaults to square feet for US work; set areaUnit when the user supplied square metres.",
      +          "exclusiveMinimum": 0,
      +          "maximum": 15000,
      +          "type": "number"
      +        },
      +        "areaUnit": {
      +          "description": "Unit for approximateSize. GB defaults to sq_m and US defaults to sq_ft. Common m2 and ft2 forms are accepted.",
      +          "enum": [
      +            "sq_m",
      +            "sq m",
      +            "m2",
      +            "m^2",
      +            "m²",
      +            "sqm",
      +            "square_metres",
      +            "square_meters",
      +            "square metres",
      +            "square meters",
      +            "sq_ft",
      +            "sq ft",
      +            "ft2",
      +            "ft^2",
      +            "ft²",
      +            "sqft",
      +            "sf",
      +            "square_feet",
      +            "square feet"
      +          ],
      +          "type": "string"
      +        },
      +        "availability": {
      +          "enum": [
      +            "Ready now",
      +            "2–4 weeks",
      +            "1–2 months",
      +            "3+ months",
      +            "6+ months",
      +            "Next year"
      +          ],
      +          "type": "string"
      +        },
      +        "barnStructureType": {
      +          "enum": [
      +            "Not sure",
      +            "Traditional timber / oak frame",
      +            "Steel portal frame",
      +            "Stone / brick load-bearing walls",
      +            "Mixed structure"
      +          ],
      +          "type": "string"
      +        },
      +        "basementAccess": {
      +          "enum": [
      +            "Direct external access",
      +            "Restricted side / rear access",
      +            "Removal through house",
      +            "Highly constrained urban access"
      +          ],
      +          "type": "string"
      +        },
      +        "basementArea": {
      +          "minimum": 0,
      +          "type": "number"
      +        },
      +        "basementBathroomIncluded": {
      +          "type": "boolean"
      +        },
      +        "basementDrainageScope": {
      +          "enum": [
      +            "Existing gravity drainage retained",
      +            "Drainage alterations",
      +            "Pumped drainage required",
      +            "Not confirmed"
      +          ],
      +          "type": "string"
      +        },
      +        "basementGroundwater": {
      +          "enum": [
      +            "No known issue",
      +            "Possible / high water table",
      +            "Known groundwater / water ingress",
      +            "Not confirmed"
      +          ],
      +          "type": "string"
      +        },
      +        "basementHeadroom": {
      +          "enum": [
      +            "No floor lowering",
      +            "Minor lowering up to 300 mm",
      +            "Lowering 300-600 mm",
      +            "Major lowering over 600 mm",
      +            "Not confirmed"
      +          ],
      +          "type": "string"
      +        },
      +        "basementIntendedUse": {
      +          "enum": [
      +            "Storage / utility",
      +            "Habitable room(s)",
      +            "Bedroom / bathroom accommodation",
      +            "Kitchen / living accommodation",
      +            "Separate dwelling / unit"
      +          ],
      +          "type": "string"
      +        },
      +        "basementLightwellCount": {
      +          "maximum": 9007199254740991,
      +          "minimum": -9007199254740991,
      +          "type": "integer"
      +        },
      +        "basementOccupancy": {
      +          "enum": [
      +            "Vacant during works",
      +            "House occupied during works"
      +          ],
      +          "type": "string"
      +        },
      +        "basementScope": {
      +          "enum": [
      +            "Existing basement refurbishment",
      +            "Existing cellar conversion",
      +            "Lower / enlarge existing cellar",
      +            "New basement beneath extension",
      +            "New basement beneath existing house"
      +          ],
      +          "type": "string"
      +        },
      +        "basementStairScope": {
      +          "enum": [
      +            "Existing stair retained",
      +            "Alter existing stair / opening",
      +            "New basement staircase"
      +          ],
      +          "type": "string"
      +        },
      +        "basementStructuralSupport": {
      +          "enum": [
      +            "No underpinning expected",
      +            "Local structural support",
      +            "Sequential underpinning",
      +            "Piled / engineered support",
      +            "Not confirmed"
      +          ],
      +          "type": "string"
      +        },
      +        "basementUtilityIncluded": {
      +          "type": "boolean"
      +        },
      +        "basementWaterproofing": {
      +          "enum": [
      +            "Existing dry system retained",
      +            "Local repairs / upgrades",
      +            "Full tanking system",
      +            "Cavity-drain membrane and pumps",
      +            "Not confirmed"
      +          ],
      +          "type": "string"
      +        },
      +        "bathroomScope": {
      +          "enum": [
      +            "No bathroom work",
      +            "Bathroom allowance",
      +            "New bathroom: supply and install",
      +            "New bathroom: install only",
      +            "Ensuite / shower room",
      +            "WC / cloakroom"
      +          ],
      +          "type": "string"
      +        },
      +        "bedroomCount": {
      +          "maximum": 9007199254740991,
      +          "minimum": -9007199254740991,
      +          "type": "integer"
      +        },
      +        "climateCodeRequirements": {
      +          "type": "boolean"
      +        },
      +        "combinedAdditionalJobType": {
      +          "enum": [
      +            "Rear extension",
      +            "Kitchen extension",
      +            "Side extension",
      +            "Wraparound extension",
      +            "Loft conversion",
      +            "Barn conversion",
      +            "Refurbishment",
      +            "Office / summerhouse",
      +            "Garage conversion",
      +            "Basement work / conversion",
      +            "New build"
      +          ],
      +          "type": "string"
      +        },
      +        "combinedAdditionalSize": {
      +          "minimum": 0,
      +          "type": "number"
      +        },
      +        "combinedPrimaryJobType": {
      +          "enum": [
      +            "Rear extension",
      +            "Kitchen extension",
      +            "Side extension",
      +            "Wraparound extension",
      +            "Loft conversion",
      +            "Barn conversion",
      +            "Refurbishment",
      +            "Office / summerhouse",
      +            "Garage conversion",
      +            "Basement work / conversion",
      +            "New build"
      +          ],
      +          "type": "string"
      +        },
      +        "commercialAsbestosStatus": {
      +          "enum": [
      +            "Refurbishment survey clear",
      +            "Management survey only",
      +            "Survey required / not confirmed",
      +            "Known asbestos constraints"
      +          ],
      +          "type": "string"
      +        },
      +        "commercialBuildingAccess": {
      +          "enum": [
      +            "Standalone / direct street access",
      +            "Shared building, straightforward access",
      +            "Managed building / booked access",
      +            "Constrained central-London access"
      +          ],
      +          "type": "string"
      +        },
      +        "commercialDataScope": {
      +          "enum": [
      +            "No data / comms work",
      +            "Data points and Wi-Fi alterations",
      +            "New structured cabling, Wi-Fi and comms cabinet"
      +          ],
      +          "type": "string"
      +        },
      +        "commercialElectricalScope": {
      +          "enum": [
      +            "Retain existing / minor electrical works",
      +            "Lighting and small-power alterations",
      +            "New lighting, power and floor-box layout"
      +          ],
      +          "type": "string"
      +        },
      +        "commercialFireSecurityScope": {
      +          "enum": [
      +            "Existing systems retained",
      +            "Fire-safety alterations and interfaces",
      +            "Fire, access control, intercom and security package"
      +          ],
      +          "type": "string"
      +        },
      +        "commercialFloorAccess": {
      +          "enum": [
      +            "Ground / first floor",
      +            "Upper floors with goods lift",
      +            "Upper floors with passenger lift only",
      +            "Upper floors by stairs only",
      +            "Multiple floors"
      +          ],
      +          "type": "string"
      +        },
      +        "commercialFurnitureIncluded": {
      +          "type": "boolean"
      +        },
      +        "commercialHvacScope": {
      +          "enum": [
      +            "Retain existing HVAC",
      +            "Alter existing AC / ventilation",
      +            "New or substantially replaced HVAC"
      +          ],
      +          "type": "string"
      +        },
      +        "commercialKitchenetteCount": {
      +          "maximum": 9007199254740991,
      +          "minimum": -9007199254740991,
      +          "type": "integer"
      +        },
      +        "commercialLandlordStatus": {
      +          "enum": [
      +            "Approval confirmed / not needed",
      +            "Licence to alter in progress",
      +            "Approval not started",
      +            "Not sure"
      +          ],
      +          "type": "string"
      +        },
      +        "commercialOccupancy": {
      +          "enum": [
      +            "Vacant during works",
      +            "Phased / partly occupied",
      +            "Fully occupied live office",
      +            "Out-of-hours works only"
      +          ],
      +          "type": "string"
      +        },
      +        "commercialPartitionsScope": {
      +          "enum": [
      +            "Retain layout / minor making good",
      +            "Some partitions and ceiling alterations",
      +            "Extensive partitions and suspended ceilings"
      +          ],
      +          "type": "string"
      +        },
      +        "commercialWashroomCount": {
      +          "maximum": 9007199254740991,
      +          "minimum": -9007199254740991,
      +          "type": "integer"
      +        },
      +        "commercialWorkstationCount": {
      +          "maximum": 9007199254740991,
      +          "minimum": -9007199254740991,
      +          "type": "integer"
      +        },
      +        "complexGroundworks": {
      +          "type": "boolean"
      +        },
      +        "decoratingDoorCount": {
      +          "maximum": 9007199254740991,
      +          "minimum": -9007199254740991,
      +          "type": "integer"
      +        },
      +        "decoratingWindowCount": {
      +          "maximum": 9007199254740991,
      +          "minimum": -9007199254740991,
      +          "type": "integer"
      +        },
      +        "doorCount": {
      +          "maximum": 9007199254740991,
      +          "minimum": -9007199254740991,
      +          "type": "integer"
      +        },
      +        "electricalServiceUpgrade": {
      +          "type": "boolean"
      +        },
      +        "externalWallArea": {
      +          "minimum": 0,
      +          "type": "number"
      +        },
      +        "finishBand": {
      +          "enum": [
      +            "Builder grade",
      +            "Good domestic",
      +            "Premium domestic"
      +          ],
      +          "type": "string"
      +        },
      +        "finishLevel": {
      +          "enum": [
      +            "builder_grade",
      +            "standard",
      +            "premium"
      +          ],
      +          "type": "string"
      +        },
      +        "foundation": {
      +          "enum": [
      +            "slab",
      +            "crawl_space",
      +            "basement",
      +            "existing_not_applicable"
      +          ],
      +          "type": "string"
      +        },
      +        "hazardousMaterialRemediation": {
      +          "type": "boolean"
      +        },
      +        "hvacReplacement": {
      +          "type": "boolean"
      +        },
      +        "includesAdditionalInternalWorks": {
      +          "type": "boolean"
      +        },
      +        "includesBasementWork": {
      +          "type": "boolean"
      +        },
      +        "includesLowerGroundWork": {
      +          "type": "boolean"
      +        },
      +        "kitchenScope": {
      +          "enum": [
      +            "No kitchen work",
      +            "Kitchen allowance",
      +            "New kitchen: supply and install",
      +            "New kitchen: install only",
      +            "Client-supplied kitchen, builder prepares room",
      +            "Kitchen / diner works"
      +          ],
      +          "type": "string"
      +        },
      +        "lowerGroundAccess": {
      +          "enum": [
      +            "Direct external access",
      +            "Access through main home",
      +            "Constrained access"
      +          ],
      +          "type": "string"
      +        },
      +        "lowerGroundArea": {
      +          "minimum": 0,
      +          "type": "number"
      +        },
      +        "lowerGroundDaylight": {
      +          "enum": [
      +            "Existing windows retained",
      +            "Alter or enlarge openings",
      +            "New lightwell / external excavation",
      +            "Not confirmed"
      +          ],
      +          "type": "string"
      +        },
      +        "lowerGroundExposure": {
      +          "enum": [
      +            "Mostly above ground",
      +            "Split-level / partly below ground",
      +            "Mostly below ground"
      +          ],
      +          "type": "string"
      +        },
      +        "lowerGroundMoisture": {
      +          "enum": [
      +            "Dry / no known issue",
      +            "Local damp repairs",
      +            "Known damp / waterproofing work",
      +            "Not confirmed"
      +          ],
      +          "type": "string"
      +        },
      +        "lowerGroundOccupancy": {
      +          "enum": [
      +            "Vacant during works",
      +            "House occupied during works"
      +          ],
      +          "type": "string"
      +        },
      +        "lowerGroundScope": {
      +          "enum": [
      +            "Refresh existing finished rooms",
      +            "Refurbish existing habitable floor",
      +            "Convert existing ancillary / storage rooms"
      +          ],
      +          "type": "string"
      +        },
      +        "lowerGroundServices": {
      +          "enum": [
      +            "Existing services retained",
      +            "Alter existing services",
      +            "New kitchen / bathroom services",
      +            "Independent services / meters"
      +          ],
      +          "type": "string"
      +        },
      +        "lowerGroundUse": {
      +          "enum": [
      +            "Part of the main home",
      +            "Dependent annexe",
      +            "Separate dwelling / unit"
      +          ],
      +          "type": "string"
      +        },
      +        "occupiedDuringWork": {
      +          "type": "boolean"
      +        },
      +        "parkingSpaces": {
      +          "maximum": 9007199254740991,
      +          "minimum": -9007199254740991,
      +          "type": "integer"
      +        },
      +        "planningStageOnly": {
      +          "type": "boolean"
      +        },
      +        "primaryConstruction": {
      +          "enum": [
      +            "wood_frame",
      +            "masonry_concrete",
      +            "other_unknown"
      +          ],
      +          "type": "string"
      +        },
      +        "propertyForm": {
      +          "enum": [
      +            "Flat",
      +            "Maisonette",
      +            "Terraced house",
      +            "Semi-detached house",
      +            "Detached house",
      +            "Barn / agricultural building",
      +            "Other / not sure",
      +            "Commercial office",
      +            "Office suite"
      +          ],
      +          "type": "string"
      +        },
      +        "propertyPeriod": {
      +          "enum": [
      +            "Not sure",
      +            "Modern / new build",
      +            "1970s-1990s",
      +            "1950s-1960s",
      +            "1930s-1940s",
      +            "Victorian / Edwardian",
      +            "Older / period property",
      +            "Listed / heritage"
      +          ],
      +          "type": "string"
      +        },
      +        "refurbishmentCondition": {
      +          "enum": [
      +            "Good",
      +            "Average",
      +            "Poor",
      +            "Damp / cracks / problematic"
      +          ],
      +          "type": "string"
      +        },
      +        "refurbishmentDecoratingArea": {
      +          "minimum": 0,
      +          "type": "number"
      +        },
      +        "refurbishmentFlooringArea": {
      +          "minimum": 0,
      +          "type": "number"
      +        },
      +        "refurbishmentPackages": {
      +          "items": {
      +            "enum": [
      +              "Plastering",
      +              "Painting & decorating",
      +              "Wood / laminate flooring",
      +              "Kitchen work",
      +              "Bathroom work",
      +              "Windows / doors / glazing",
      +              "External walls / insulation",
      +              "General building / making good"
      +            ],
      +            "type": "string"
      +          },
      +          "maxItems": 12,
      +          "type": "array"
      +        },
      +        "refurbishmentPlasteringArea": {
      +          "minimum": 0,
      +          "type": "number"
      +        },
      +        "refurbishmentPrepLevel": {
      +          "enum": [
      +            "Simple refresh",
      +            "Normal prep",
      +            "Heavy prep"
      +          ],
      +          "type": "string"
      +        },
      +        "refurbishmentRoomState": {
      +          "enum": [
      +            "Empty",
      +            "Partly furnished",
      +            "Occupied"
      +          ],
      +          "type": "string"
      +        },
      +        "refurbishmentScope": {
      +          "enum": [
      +            "General refurbishment",
      +            "Mixed room upgrade",
      +            "Decoration only",
      +            "External walls / insulation",
      +            "Windows / doors / glazing",
      +            "Kitchen works",
      +            "Bathroom works",
      +            "Kitchen and bathroom works",
      +            "Whole property refurbishment"
      +          ],
      +          "type": "string"
      +        },
      +        "roomCount": {
      +          "maximum": 9007199254740991,
      +          "minimum": -9007199254740991,
      +          "type": "integer"
      +        },
      +        "scopeBand": {
      +          "enum": [
      +            "Lean",
      +            "Balanced",
      +            "Expanded"
      +          ],
      +          "type": "string"
      +        },
      +        "scopeLevel": {
      +          "enum": [
      +            "defined",
      +            "typical",
      +            "expanded"
      +          ],
      +          "type": "string"
      +        },
      +        "structuralChanges": {
      +          "type": "boolean"
      +        },
      +        "structuralSteelLikely": {
      +          "type": "boolean"
      +        },
      +        "urgencyBand": {
      +          "enum": [
      +            "Flexible",
      +            "Soon",
      +            "Urgent"
      +          ],
      +          "type": "string"
      +        },
      +        "windowCount": {
      +          "maximum": 9007199254740991,
      +          "minimum": -9007199254740991,
      +          "type": "integer"
      +        }
      +      },
      +      "type": "object"
      +    },
      +    "state": {
      +      "description": "US two-letter state or DC code.",
      +      "enum": [
      +        "CT",
      +        "ME",
      +        "MA",
      +        "NH",
      +        "RI",
      +        "VT",
      +        "NJ",
      +        "NY",
      +        "PA",
      +        "IN",
      +        "IL",
      +        "MI",
      +        "OH",
      +        "WI",
      +        "IA",
      +        "KS",
      +        "MN",
      +        "MO",
      +        "NE",
      +        "ND",
      +        "SD",
      +        "DE",
      +        "DC",
      +        "FL",
      +        "GA",
      +        "MD",
      +        "NC",
      +        "SC",
      +        "VA",
      +        "WV",
      +        "AL",
      +        "KY",
      +        "MS",
      +        "TN",
      +        "AR",
      +        "LA",
      +        "OK",
      +        "TX",
      +        "AZ",
      +        "CO",
      +        "ID",
      +        "MT",
      +        "NV",
      +        "NM",
      +        "UT",
      +        "WY",
      +        "CA",
      +        "OR",
      +        "WA",
      +        "AK",
      +        "HI"
      +      ],
      +      "type": "string"
      +    },
      +    "zipCode": {
      +      "description": "Optional US five-digit ZIP code. Never send a street address.",
      +      "pattern": "^\\d{5}$",
      +      "type": "string"
      +    }
      +  },
      +  "type": "object"
      +}
    • addedInput schema / properties / scenarios
      Added value: +{
      +  "items": {
      +    "additionalProperties": false,
      +    "properties": {
      +      "changes": {
      +        "additionalProperties": false,
      +        "description": "Country-specific project scope. Use UK fields for GB and US fields for US; do not invent unanswered values.",
      +        "properties": {
      +          "access": {
      +            "enum": [
      +              "straightforward",
      +              "constrained",
      +              "remote"
      +            ],
      +            "type": "string"
      +          },
      +          "accessIssues": {
      +            "type": "boolean"
      +          },
      +          "additionalInternalWorkPackages": {
      +            "items": {
      +              "enum": [
      +                "Plastering",
      +                "Painting & decorating",
      +                "Wood / laminate flooring",
      +                "Kitchen work",
      +                "Bathroom work",
      +                "Windows / doors / glazing",
      +                "External walls / insulation",
      +                "General building / making good"
      +              ],
      +              "type": "string"
      +            },
      +            "maxItems": 12,
      +            "type": "array"
      +          },
      +          "additionalInternalWorksArea": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "approximateSize": {
      +            "description": "Project floor area. Defaults to square feet for US work; set areaUnit when the user supplied square metres.",
      +            "exclusiveMinimum": 0,
      +            "maximum": 15000,
      +            "type": "number"
      +          },
      +          "areaUnit": {
      +            "description": "Unit for approximateSize. GB defaults to sq_m and US defaults to sq_ft. Common m2 and ft2 forms are accepted.",
      +            "enum": [
      +              "sq_m",
      +              "sq m",
      +              "m2",
      +              "m^2",
      +              "m²",
      +              "sqm",
      +              "square_metres",
      +              "square_meters",
      +              "square metres",
      +              "square meters",
      +              "sq_ft",
      +              "sq ft",
      +              "ft2",
      +              "ft^2",
      +              "ft²",
      +              "sqft",
      +              "sf",
      +              "square_feet",
      +              "square feet"
      +            ],
      +            "type": "string"
      +          },
      +          "availability": {
      +            "enum": [
      +              "Ready now",
      +              "2–4 weeks",
      +              "1–2 months",
      +              "3+ months",
      +              "6+ months",
      +              "Next year"
      +            ],
      +            "type": "string"
      +          },
      +          "barnStructureType": {
      +            "enum": [
      +              "Not sure",
      +              "Traditional timber / oak frame",
      +              "Steel portal frame",
      +              "Stone / brick load-bearing walls",
      +              "Mixed structure"
      +            ],
      +            "type": "string"
      +          },
      +          "basementAccess": {
      +            "enum": [
      +              "Direct external access",
      +              "Restricted side / rear access",
      +              "Removal through house",
      +              "Highly constrained urban access"
      +            ],
      +            "type": "string"
      +          },
      +          "basementArea": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "basementBathroomIncluded": {
      +            "type": "boolean"
      +          },
      +          "basementDrainageScope": {
      +            "enum": [
      +              "Existing gravity drainage retained",
      +              "Drainage alterations",
      +              "Pumped drainage required",
      +              "Not confirmed"
      +            ],
      +            "type": "string"
      +          },
      +          "basementGroundwater": {
      +            "enum": [
      +              "No known issue",
      +              "Possible / high water table",
      +              "Known groundwater / water ingress",
      +              "Not confirmed"
      +            ],
      +            "type": "string"
      +          },
      +          "basementHeadroom": {
      +            "enum": [
      +              "No floor lowering",
      +              "Minor lowering up to 300 mm",
      +              "Lowering 300-600 mm",
      +              "Major lowering over 600 mm",
      +              "Not confirmed"
      +            ],
      +            "type": "string"
      +          },
      +          "basementIntendedUse": {
      +            "enum": [
      +              "Storage / utility",
      +              "Habitable room(s)",
      +              "Bedroom / bathroom accommodation",
      +              "Kitchen / living accommodation",
      +              "Separate dwelling / unit"
      +            ],
      +            "type": "string"
      +          },
      +          "basementLightwellCount": {
      +            "maximum": 9007199254740991,
      +            "minimum": -9007199254740991,
      +            "type": "integer"
      +          },
      +          "basementOccupancy": {
      +            "enum": [
      +              "Vacant during works",
      +              "House occupied during works"
      +            ],
      +            "type": "string"
      +          },
      +          "basementScope": {
      +            "enum": [
      +              "Existing basement refurbishment",
      +              "Existing cellar conversion",
      +              "Lower / enlarge existing cellar",
      +              "New basement beneath extension",
      +              "New basement beneath existing house"
      +            ],
      +            "type": "string"
      +          },
      +          "basementStairScope": {
      +            "enum": [
      +              "Existing stair retained",
      +              "Alter existing stair / opening",
      +              "New basement staircase"
      +            ],
      +            "type": "string"
      +          },
      +          "basementStructuralSupport": {
      +            "enum": [
      +              "No underpinning expected",
      +              "Local structural support",
      +              "Sequential underpinning",
      +              "Piled / engineered support",
      +              "Not confirmed"
      +            ],
      +            "type": "string"
      +          },
      +          "basementUtilityIncluded": {
      +            "type": "boolean"
      +          },
      +          "basementWaterproofing": {
      +            "enum": [
      +              "Existing dry system retained",
      +              "Local repairs / upgrades",
      +              "Full tanking system",
      +              "Cavity-drain membrane and pumps",
      +              "Not confirmed"
      +            ],
      +            "type": "string"
      +          },
      +          "bathroomScope": {
      +            "enum": [
      +              "No bathroom work",
      +              "Bathroom allowance",
      +              "New bathroom: supply and install",
      +              "New bathroom: install only",
      +              "Ensuite / shower room",
      +              "WC / cloakroom"
      +            ],
      +            "type": "string"
      +          },
      +          "bedroomCount": {
      +            "maximum": 9007199254740991,
      +            "minimum": -9007199254740991,
      +            "type": "integer"
      +          },
      +          "climateCodeRequirements": {
      +            "type": "boolean"
      +          },
      +          "combinedAdditionalJobType": {
      +            "enum": [
      +              "Rear extension",
      +              "Kitchen extension",
      +              "Side extension",
      +              "Wraparound extension",
      +              "Loft conversion",
      +              "Barn conversion",
      +              "Refurbishment",
      +              "Office / summerhouse",
      +              "Garage conversion",
      +              "Basement work / conversion",
      +              "New build"
      +            ],
      +            "type": "string"
      +          },
      +          "combinedAdditionalSize": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "combinedPrimaryJobType": {
      +            "enum": [
      +              "Rear extension",
      +              "Kitchen extension",
      +              "Side extension",
      +              "Wraparound extension",
      +              "Loft conversion",
      +              "Barn conversion",
      +              "Refurbishment",
      +              "Office / summerhouse",
      +              "Garage conversion",
      +              "Basement work / conversion",
      +              "New build"
      +            ],
      +            "type": "string"
      +          },
      +          "commercialAsbestosStatus": {
      +            "enum": [
      +              "Refurbishment survey clear",
      +              "Management survey only",
      +              "Survey required / not confirmed",
      +              "Known asbestos constraints"
      +            ],
      +            "type": "string"
      +          },
      +          "commercialBuildingAccess": {
      +            "enum": [
      +              "Standalone / direct street access",
      +              "Shared building, straightforward access",
      +              "Managed building / booked access",
      +              "Constrained central-London access"
      +            ],
      +            "type": "string"
      +          },
      +          "commercialDataScope": {
      +            "enum": [
      +              "No data / comms work",
      +              "Data points and Wi-Fi alterations",
      +              "New structured cabling, Wi-Fi and comms cabinet"
      +            ],
      +            "type": "string"
      +          },
      +          "commercialElectricalScope": {
      +            "enum": [
      +              "Retain existing / minor electrical works",
      +              "Lighting and small-power alterations",
      +              "New lighting, power and floor-box layout"
      +            ],
      +            "type": "string"
      +          },
      +          "commercialFireSecurityScope": {
      +            "enum": [
      +              "Existing systems retained",
      +              "Fire-safety alterations and interfaces",
      +              "Fire, access control, intercom and security package"
      +            ],
      +            "type": "string"
      +          },
      +          "commercialFloorAccess": {
      +            "enum": [
      +              "Ground / first floor",
      +              "Upper floors with goods lift",
      +              "Upper floors with passenger lift only",
      +              "Upper floors by stairs only",
      +              "Multiple floors"
      +            ],
      +            "type": "string"
      +          },
      +          "commercialFurnitureIncluded": {
      +            "type": "boolean"
      +          },
      +          "commercialHvacScope": {
      +            "enum": [
      +              "Retain existing HVAC",
      +              "Alter existing AC / ventilation",
      +              "New or substantially replaced HVAC"
      +            ],
      +            "type": "string"
      +          },
      +          "commercialKitchenetteCount": {
      +            "maximum": 9007199254740991,
      +            "minimum": -9007199254740991,
      +            "type": "integer"
      +          },
      +          "commercialLandlordStatus": {
      +            "enum": [
      +              "Approval confirmed / not needed",
      +              "Licence to alter in progress",
      +              "Approval not started",
      +              "Not sure"
      +            ],
      +            "type": "string"
      +          },
      +          "commercialOccupancy": {
      +            "enum": [
      +              "Vacant during works",
      +              "Phased / partly occupied",
      +              "Fully occupied live office",
      +              "Out-of-hours works only"
      +            ],
      +            "type": "string"
      +          },
      +          "commercialPartitionsScope": {
      +            "enum": [
      +              "Retain layout / minor making good",
      +              "Some partitions and ceiling alterations",
      +              "Extensive partitions and suspended ceilings"
      +            ],
      +            "type": "string"
      +          },
      +          "commercialWashroomCount": {
      +            "maximum": 9007199254740991,
      +            "minimum": -9007199254740991,
      +            "type": "integer"
      +          },
      +          "commercialWorkstationCount": {
      +            "maximum": 9007199254740991,
      +            "minimum": -9007199254740991,
      +            "type": "integer"
      +          },
      +          "complexGroundworks": {
      +            "type": "boolean"
      +          },
      +          "decoratingDoorCount": {
      +            "maximum": 9007199254740991,
      +            "minimum": -9007199254740991,
      +            "type": "integer"
      +          },
      +          "decoratingWindowCount": {
      +            "maximum": 9007199254740991,
      +            "minimum": -9007199254740991,
      +            "type": "integer"
      +          },
      +          "doorCount": {
      +            "maximum": 9007199254740991,
      +            "minimum": -9007199254740991,
      +            "type": "integer"
      +          },
      +          "electricalServiceUpgrade": {
      +            "type": "boolean"
      +          },
      +          "externalWallArea": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "finishBand": {
      +            "enum": [
      +              "Builder grade",
      +              "Good domestic",
      +              "Premium domestic"
      +            ],
      +            "type": "string"
      +          },
      +          "finishLevel": {
      +            "enum": [
      +              "builder_grade",
      +              "standard",
      +              "premium"
      +            ],
      +            "type": "string"
      +          },
      +          "foundation": {
      +            "enum": [
      +              "slab",
      +              "crawl_space",
      +              "basement",
      +              "existing_not_applicable"
      +            ],
      +            "type": "string"
      +          },
      +          "hazardousMaterialRemediation": {
      +            "type": "boolean"
      +          },
      +          "hvacReplacement": {
      +            "type": "boolean"
      +          },
      +          "includesAdditionalInternalWorks": {
      +            "type": "boolean"
      +          },
      +          "includesBasementWork": {
      +            "type": "boolean"
      +          },
      +          "includesLowerGroundWork": {
      +            "type": "boolean"
      +          },
      +          "kitchenScope": {
      +            "enum": [
      +              "No kitchen work",
      +              "Kitchen allowance",
      +              "New kitchen: supply and install",
      +              "New kitchen: install only",
      +              "Client-supplied kitchen, builder prepares room",
      +              "Kitchen / diner works"
      +            ],
      +            "type": "string"
      +          },
      +          "lowerGroundAccess": {
      +            "enum": [
      +              "Direct external access",
      +              "Access through main home",
      +              "Constrained access"
      +            ],
      +            "type": "string"
      +          },
      +          "lowerGroundArea": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "lowerGroundDaylight": {
      +            "enum": [
      +              "Existing windows retained",
      +              "Alter or enlarge openings",
      +              "New lightwell / external excavation",
      +              "Not confirmed"
      +            ],
      +            "type": "string"
      +          },
      +          "lowerGroundExposure": {
      +            "enum": [
      +              "Mostly above ground",
      +              "Split-level / partly below ground",
      +              "Mostly below ground"
      +            ],
      +            "type": "string"
      +          },
      +          "lowerGroundMoisture": {
      +            "enum": [
      +              "Dry / no known issue",
      +              "Local damp repairs",
      +              "Known damp / waterproofing work",
      +              "Not confirmed"
      +            ],
      +            "type": "string"
      +          },
      +          "lowerGroundOccupancy": {
      +            "enum": [
      +              "Vacant during works",
      +              "House occupied during works"
      +            ],
      +            "type": "string"
      +          },
      +          "lowerGroundScope": {
      +            "enum": [
      +              "Refresh existing finished rooms",
      +              "Refurbish existing habitable floor",
      +              "Convert existing ancillary / storage rooms"
      +            ],
      +            "type": "string"
      +          },
      +          "lowerGroundServices": {
      +            "enum": [
      +              "Existing services retained",
      +              "Alter existing services",
      +              "New kitchen / bathroom services",
      +              "Independent services / meters"
      +            ],
      +            "type": "string"
      +          },
      +          "lowerGroundUse": {
      +            "enum": [
      +              "Part of the main home",
      +              "Dependent annexe",
      +              "Separate dwelling / unit"
      +            ],
      +            "type": "string"
      +          },
      +          "occupiedDuringWork": {
      +            "type": "boolean"
      +          },
      +          "parkingSpaces": {
      +            "maximum": 9007199254740991,
      +            "minimum": -9007199254740991,
      +            "type": "integer"
      +          },
      +          "planningStageOnly": {
      +            "type": "boolean"
      +          },
      +          "primaryConstruction": {
      +            "enum": [
      +              "wood_frame",
      +              "masonry_concrete",
      +              "other_unknown"
      +            ],
      +            "type": "string"
      +          },
      +          "propertyForm": {
      +            "enum": [
      +              "Flat",
      +              "Maisonette",
      +              "Terraced house",
      +              "Semi-detached house",
      +              "Detached house",
      +              "Barn / agricultural building",
      +              "Other / not sure",
      +              "Commercial office",
      +              "Office suite"
      +            ],
      +            "type": "string"
      +          },
      +          "propertyPeriod": {
      +            "enum": [
      +              "Not sure",
      +              "Modern / new build",
      +              "1970s-1990s",
      +              "1950s-1960s",
      +              "1930s-1940s",
      +              "Victorian / Edwardian",
      +              "Older / period property",
      +              "Listed / heritage"
      +            ],
      +            "type": "string"
      +          },
      +          "refurbishmentCondition": {
      +            "enum": [
      +              "Good",
      +              "Average",
      +              "Poor",
      +              "Damp / cracks / problematic"
      +            ],
      +            "type": "string"
      +          },
      +          "refurbishmentDecoratingArea": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "refurbishmentFlooringArea": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "refurbishmentPackages": {
      +            "items": {
      +              "enum": [
      +                "Plastering",
      +                "Painting & decorating",
      +                "Wood / laminate flooring",
      +                "Kitchen work",
      +                "Bathroom work",
      +                "Windows / doors / glazing",
      +                "External walls / insulation",
      +                "General building / making good"
      +              ],
      +              "type": "string"
      +            },
      +            "maxItems": 12,
      +            "type": "array"
      +          },
      +          "refurbishmentPlasteringArea": {
      +            "minimum": 0,
      +            "type": "number"
      +          },
      +          "refurbishmentPrepLevel": {
      +            "enum": [
      +              "Simple refresh",
      +              "Normal prep",
      +              "Heavy prep"
      +            ],
      +            "type": "string"
      +          },
      +          "refurbishmentRoomState": {
      +            "enum": [
      +              "Empty",
      +              "Partly furnished",
      +              "Occupied"
      +            ],
      +            "type": "string"
      +          },
      +          "refurbishmentScope": {
      +            "enum": [
      +              "General refurbishment",
      +              "Mixed room upgrade",
      +              "Decoration only",
      +              "External walls / insulation",
      +              "Windows / doors / glazing",
      +              "Kitchen works",
      +              "Bathroom works",
      +              "Kitchen and bathroom works",
      +              "Whole property refurbishment"
      +            ],
      +            "type": "string"
      +          },
      +          "roomCount": {
      +            "maximum": 9007199254740991,
      +            "minimum": -9007199254740991,
      +            "type": "integer"
      +          },
      +          "scopeBand": {
      +            "enum": [
      +              "Lean",
      +              "Balanced",
      +              "Expanded"
      +            ],
      +            "type": "string"
      +          },
      +          "scopeLevel": {
      +            "enum": [
      +              "defined",
      +              "typical",
      +              "expanded"
      +            ],
      +            "type": "string"
      +          },
      +          "structuralChanges": {
      +            "type": "boolean"
      +          },
      +          "structuralSteelLikely": {
      +            "type": "boolean"
      +          },
      +          "urgencyBand": {
      +            "enum": [
      +              "Flexible",
      +              "Soon",
      +              "Urgent"
      +            ],
      +            "type": "string"
      +          },
      +          "windowCount": {
      +            "maximum": 9007199254740991,
      +            "minimum": -9007199254740991,
      +            "type": "integer"
      +          }
      +        },
      +        "type": "object"
      +      },
      +      "label": {
      +        "enum": [
      +          "Option 1",
      +          "Option 2",
      +          "Option 3"
      +        ],
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "label",
      +      "changes"
      +    ],
      +    "type": "object"
      +  },
      +  "maxItems": 3,
      +  "minItems": 1,
      +  "type": "array"
      +}
    • addedInput schema / required
      Added value: +[
      +  "baseline",
      +  "scenarios"
      +]
  6. Changed5 schema fields changed
    • removedInput schema / $schema
      Removed value: -"http://json-schema.org/draft-07/schema#"
    • removedInput schema / additionalProperties
      Removed value: -false
    • removedInput schema / properties / baseline
      Removed value: -{
      -  "additionalProperties": false,
      -  "properties": {
      -    "jobType": {
      -      "enum": [
      -        "Combined project",
      -        "Rear extension",
      -        "Kitchen extension",
      -        "Side extension",
      -        "Wraparound extension",
      -        "Loft conversion",
      -        "Barn conversion",
      -        "Refurbishment",
      -        "Commercial office refurbishment",
      -        "New kitchen",
      -        "New bathroom",
      -        "Office / summerhouse",
      -        "Garage conversion",
      -        "Basement work / conversion",
      -        "Lower-ground floor refurbishment",
      -        "New build"
      -      ],
      -      "type": "string"
      -    },
      -    "postcodeArea": {
      -      "pattern": "^[A-Z]{1,2}\\d[A-Z\\d]?$",
      -      "type": "string"
      -    },
      -    "scope": {
      -      "additionalProperties": false,
      -      "default": {},
      -      "properties": {
      -        "accessIssues": {
      -          "type": "boolean"
      -        },
      -        "additionalInternalWorkPackages": {
      -          "items": {
      -            "enum": [
      -              "Plastering",
      -              "Painting & decorating",
      -              "Wood / laminate flooring",
      -              "Kitchen work",
      -              "Bathroom work",
      -              "Windows / doors / glazing",
      -              "External walls / insulation",
      -              "General building / making good"
      -            ],
      -            "type": "string"
      -          },
      -          "maxItems": 12,
      -          "type": "array"
      -        },
      -        "additionalInternalWorksArea": {
      -          "minimum": 0,
      -          "type": "number"
      -        },
      -        "approximateSize": {
      -          "description": "Area in square metres, using the work type's area definition.",
      -          "minimum": 0,
      -          "type": "number"
      -        },
      -        "availability": {
      -          "enum": [
      -            "Ready now",
      -            "2–4 weeks",
      -            "1–2 months",
      -            "3+ months",
      -            "6+ months",
      -            "Next year"
      -          ],
      -          "type": "string"
      -        },
      -        "barnStructureType": {
      -          "enum": [
      -            "Not sure",
      -            "Traditional timber / oak frame",
      -            "Steel portal frame",
      -            "Stone / brick load-bearing walls",
      -            "Mixed structure"
      -          ],
      -          "type": "string"
      -        },
      -        "basementAccess": {
      -          "enum": [
      -            "Direct external access",
      -            "Restricted side / rear access",
      -            "Removal through house",
      -            "Highly constrained urban access"
      -          ],
      -          "type": "string"
      -        },
      -        "basementArea": {
      -          "minimum": 0,
      -          "type": "number"
      -        },
      -        "basementBathroomIncluded": {
      -          "type": "boolean"
      -        },
      -        "basementDrainageScope": {
      -          "enum": [
      -            "Existing gravity drainage retained",
      -            "Drainage alterations",
      -            "Pumped drainage required",
      -            "Not confirmed"
      -          ],
      -          "type": "string"
      -        },
      -        "basementGroundwater": {
      -          "enum": [
      -            "No known issue",
      -            "Possible / high water table",
      -            "Known groundwater / water ingress",
      -            "Not confirmed"
      -          ],
      -          "type": "string"
      -        },
      -        "basementHeadroom": {
      -          "enum": [
      -            "No floor lowering",
      -            "Minor lowering up to 300 mm",
      -            "Lowering 300-600 mm",
      -            "Major lowering over 600 mm",
      -            "Not confirmed"
      -          ],
      -          "type": "string"
      -        },
      -        "basementIntendedUse": {
      -          "enum": [
      -            "Storage / utility",
      -            "Habitable room(s)",
      -            "Bedroom / bathroom accommodation",
      -            "Kitchen / living accommodation",
      -            "Separate dwelling / unit"
      -          ],
      -          "type": "string"
      -        },
      -        "basementLightwellCount": {
      -          "maximum": 9007199254740991,
      -          "minimum": -9007199254740991,
      -          "type": "integer"
      -        },
      -        "basementOccupancy": {
      -          "enum": [
      -            "Vacant during works",
      -            "House occupied during works"
      -          ],
      -          "type": "string"
      -        },
      -        "basementScope": {
      -          "enum": [
      -            "Existing basement refurbishment",
      -            "Existing cellar conversion",
      -            "Lower / enlarge existing cellar",
      -            "New basement beneath extension",
      -            "New basement beneath existing house"
      -          ],
      -          "type": "string"
      -        },
      -        "basementStairScope": {
      -          "enum": [
      -            "Existing stair retained",
      -            "Alter existing stair / opening",
      -            "New basement staircase"
      -          ],
      -          "type": "string"
      -        },
      -        "basementStructuralSupport": {
      -          "enum": [
      -            "No underpinning expected",
      -            "Local structural support",
      -            "Sequential underpinning",
      -            "Piled / engineered support",
      -            "Not confirmed"
      -          ],
      -          "type": "string"
      -        },
      -        "basementUtilityIncluded": {
      -          "type": "boolean"
      -        },
      -        "basementWaterproofing": {
      -          "enum": [
      -            "Existing dry system retained",
      -            "Local repairs / upgrades",
      -            "Full tanking system",
      -            "Cavity-drain membrane and pumps",
      -            "Not confirmed"
      -          ],
      -          "type": "string"
      -        },
      -        "bathroomScope": {
      -          "enum": [
      -            "No bathroom work",
      -            "Bathroom allowance",
      -            "New bathroom: supply and install",
      -            "New bathroom: install only",
      -            "Ensuite / shower room",
      -            "WC / cloakroom"
      -          ],
      -          "type": "string"
      -        },
      -        "bedroomCount": {
      -          "maximum": 9007199254740991,
      -          "minimum": -9007199254740991,
      -          "type": "integer"
      -        },
      -        "combinedAdditionalJobType": {
      -          "enum": [
      -            "Rear extension",
      -            "Kitchen extension",
      -            "Side extension",
      -            "Wraparound extension",
      -            "Loft conversion",
      -            "Barn conversion",
      -            "Refurbishment",
      -            "Office / summerhouse",
      -            "Garage conversion",
      -            "Basement work / conversion",
      -            "New build"
      -          ],
      -          "type": "string"
      -        },
      -        "combinedAdditionalSize": {
      -          "minimum": 0,
      -          "type": "number"
      -        },
      -        "combinedPrimaryJobType": {
      -          "enum": [
      -            "Rear extension",
      -            "Kitchen extension",
      -            "Side extension",
      -            "Wraparound extension",
      -            "Loft conversion",
      -            "Barn conversion",
      -            "Refurbishment",
      -            "Office / summerhouse",
      -            "Garage conversion",
      -            "Basement work / conversion",
      -            "New build"
      -          ],
      -          "type": "string"
      -        },
      -        "commercialAsbestosStatus": {
      -          "enum": [
      -            "Refurbishment survey clear",
      -            "Management survey only",
      -            "Survey required / not confirmed",
      -            "Known asbestos constraints"
      -          ],
      -          "type": "string"
      -        },
      -        "commercialBuildingAccess": {
      -          "enum": [
      -            "Standalone / direct street access",
      -            "Shared building, straightforward access",
      -            "Managed building / booked access",
      -            "Constrained central-London access"
      -          ],
      -          "type": "string"
      -        },
      -        "commercialDataScope": {
      -          "enum": [
      -            "No data / comms work",
      -            "Data points and Wi-Fi alterations",
      -            "New structured cabling, Wi-Fi and comms cabinet"
      -          ],
      -          "type": "string"
      -        },
      -        "commercialElectricalScope": {
      -          "enum": [
      -            "Retain existing / minor electrical works",
      -            "Lighting and small-power alterations",
      -            "New lighting, power and floor-box layout"
      -          ],
      -          "type": "string"
      -        },
      -        "commercialFireSecurityScope": {
      -          "enum": [
      -            "Existing systems retained",
      -            "Fire-safety alterations and interfaces",
      -            "Fire, access control, intercom and security package"
      -          ],
      -          "type": "string"
      -        },
      -        "commercialFloorAccess": {
      -          "enum": [
      -            "Ground / first floor",
      -            "Upper floors with goods lift",
      -            "Upper floors with passenger lift only",
      -            "Upper floors by stairs only",
      -            "Multiple floors"
      -          ],
      -          "type": "string"
      -        },
      -        "commercialFurnitureIncluded": {
      -          "type": "boolean"
      -        },
      -        "commercialHvacScope": {
      -          "enum": [
      -            "Retain existing HVAC",
      -            "Alter existing AC / ventilation",
      -            "New or substantially replaced HVAC"
      -          ],
      -          "type": "string"
      -        },
      -        "commercialKitchenetteCount": {
      -          "maximum": 9007199254740991,
      -          "minimum": -9007199254740991,
      -          "type": "integer"
      -        },
      -        "commercialLandlordStatus": {
      -          "enum": [
      -            "Approval confirmed / not needed",
      -            "Licence to alter in progress",
      -            "Approval not started",
      -            "Not sure"
      -          ],
      -          "type": "string"
      -        },
      -        "commercialOccupancy": {
      -          "enum": [
      -            "Vacant during works",
      -            "Phased / partly occupied",
      -            "Fully occupied live office",
      -            "Out-of-hours works only"
      -          ],
      -          "type": "string"
      -        },
      -        "commercialPartitionsScope": {
      -          "enum": [
      -            "Retain layout / minor making good",
      -            "Some partitions and ceiling alterations",
      -            "Extensive partitions and suspended ceilings"
      -          ],
      -          "type": "string"
      -        },
      -        "commercialWashroomCount": {
      -          "maximum": 9007199254740991,
      -          "minimum": -9007199254740991,
      -          "type": "integer"
      -        },
      -        "commercialWorkstationCount": {
      -          "maximum": 9007199254740991,
      -          "minimum": -9007199254740991,
      -          "type": "integer"
      -        },
      -        "complexGroundworks": {
      -          "type": "boolean"
      -        },
      -        "decoratingDoorCount": {
      -          "maximum": 9007199254740991,
      -          "minimum": -9007199254740991,
      -          "type": "integer"
      -        },
      -        "decoratingWindowCount": {
      -          "maximum": 9007199254740991,
      -          "minimum": -9007199254740991,
      -          "type": "integer"
      -        },
      -        "doorCount": {
      -          "maximum": 9007199254740991,
      -          "minimum": -9007199254740991,
      -          "type": "integer"
      -        },
      -        "externalWallArea": {
      -          "minimum": 0,
      -          "type": "number"
      -        },
      -        "finishBand": {
      -          "enum": [
      -            "Builder grade",
      -            "Good domestic",
      -            "Premium domestic"
      -          ],
      -          "type": "string"
      -        },
      -        "includesAdditionalInternalWorks": {
      -          "type": "boolean"
      -        },
      -        "includesBasementWork": {
      -          "type": "boolean"
      -        },
      -        "includesLowerGroundWork": {
      -          "type": "boolean"
      -        },
      -        "kitchenScope": {
      -          "enum": [
      -            "No kitchen work",
      -            "Kitchen allowance",
      -            "New kitchen: supply and install",
      -            "New kitchen: install only",
      -            "Client-supplied kitchen, builder prepares room",
      -            "Kitchen / diner works"
      -          ],
      -          "type": "string"
      -        },
      -        "lowerGroundAccess": {
      -          "enum": [
      -            "Direct external access",
      -            "Access through main home",
      -            "Constrained access"
      -          ],
      -          "type": "string"
      -        },
      -        "lowerGroundArea": {
      -          "minimum": 0,
      -          "type": "number"
      -        },
      -        "lowerGroundDaylight": {
      -          "enum": [
      -            "Existing windows retained",
      -            "Alter or enlarge openings",
      -            "New lightwell / external excavation",
      -            "Not confirmed"
      -          ],
      -          "type": "string"
      -        },
      -        "lowerGroundExposure": {
      -          "enum": [
      -            "Mostly above ground",
      -            "Split-level / partly below ground",
      -            "Mostly below ground"
      -          ],
      -          "type": "string"
      -        },
      -        "lowerGroundMoisture": {
      -          "enum": [
      -            "Dry / no known issue",
      -            "Local damp repairs",
      -            "Known damp / waterproofing work",
      -            "Not confirmed"
      -          ],
      -          "type": "string"
      -        },
      -        "lowerGroundOccupancy": {
      -          "enum": [
      -            "Vacant during works",
      -            "House occupied during works"
      -          ],
      -          "type": "string"
      -        },
      -        "lowerGroundScope": {
      -          "enum": [
      -            "Refresh existing finished rooms",
      -            "Refurbish existing habitable floor",
      -            "Convert existing ancillary / storage rooms"
      -          ],
      -          "type": "string"
      -        },
      -        "lowerGroundServices": {
      -          "enum": [
      -            "Existing services retained",
      -            "Alter existing services",
      -            "New kitchen / bathroom services",
      -            "Independent services / meters"
      -          ],
      -          "type": "string"
      -        },
      -        "lowerGroundUse": {
      -          "enum": [
      -            "Part of the main home",
      -            "Dependent annexe",
      -            "Separate dwelling / unit"
      -          ],
      -          "type": "string"
      -        },
      -        "parkingSpaces": {
      -          "maximum": 9007199254740991,
      -          "minimum": -9007199254740991,
      -          "type": "integer"
      -        },
      -        "planningStageOnly": {
      -          "type": "boolean"
      -        },
      -        "propertyForm": {
      -          "enum": [
      -            "Flat",
      -            "Maisonette",
      -            "Terraced house",
      -            "Semi-detached house",
      -            "Detached house",
      -            "Barn / agricultural building",
      -            "Other / not sure",
      -            "Commercial office",
      -            "Office suite"
      -          ],
      -          "type": "string"
      -        },
      -        "propertyPeriod": {
      -          "enum": [
      -            "Not sure",
      -            "Modern / new build",
      -            "1970s-1990s",
      -            "1950s-1960s",
      -            "1930s-1940s",
      -            "Victorian / Edwardian",
      -            "Older / period property",
      -            "Listed / heritage"
      -          ],
      -          "type": "string"
      -        },
      -        "refurbishmentCondition": {
      -          "enum": [
      -            "Good",
      -            "Average",
      -            "Poor",
      -            "Damp / cracks / problematic"
      -          ],
      -          "type": "string"
      -        },
      -        "refurbishmentDecoratingArea": {
      -          "minimum": 0,
      -          "type": "number"
      -        },
      -        "refurbishmentFlooringArea": {
      -          "minimum": 0,
      -          "type": "number"
      -        },
      -        "refurbishmentPackages": {
      -          "items": {
      -            "enum": [
      -              "Plastering",
      -              "Painting & decorating",
      -              "Wood / laminate flooring",
      -              "Kitchen work",
      -              "Bathroom work",
      -              "Windows / doors / glazing",
      -              "External walls / insulation",
      -              "General building / making good"
      -            ],
      -            "type": "string"
      -          },
      -          "maxItems": 12,
      -          "type": "array"
      -        },
      -        "refurbishmentPlasteringArea": {
      -          "minimum": 0,
      -          "type": "number"
      -        },
      -        "refurbishmentPrepLevel": {
      -          "enum": [
      -            "Simple refresh",
      -            "Normal prep",
      -            "Heavy prep"
      -          ],
      -          "type": "string"
      -        },
      -        "refurbishmentRoomState": {
      -          "enum": [
      -            "Empty",
      -            "Partly furnished",
      -            "Occupied"
      -          ],
      -          "type": "string"
      -        },
      -        "refurbishmentScope": {
      -          "enum": [
      -            "General refurbishment",
      -            "Mixed room upgrade",
      -            "Decoration only",
      -            "External walls / insulation",
      -            "Windows / doors / glazing",
      -            "Kitchen works",
      -            "Bathroom works",
      -            "Kitchen and bathroom works",
      -            "Whole property refurbishment"
      -          ],
      -          "type": "string"
      -        },
      -        "roomCount": {
      -          "maximum": 9007199254740991,
      -          "minimum": -9007199254740991,
      -          "type": "integer"
      -        },
      -        "scopeBand": {
      -          "enum": [
      -            "Lean",
      -            "Balanced",
      -            "Expanded"
      -          ],
      -          "type": "string"
      -        },
      -        "structuralSteelLikely": {
      -          "type": "boolean"
      -        },
      -        "urgencyBand": {
      -          "enum": [
      -            "Flexible",
      -            "Soon",
      -            "Urgent"
      -          ],
      -          "type": "string"
      -        },
      -        "windowCount": {
      -          "maximum": 9007199254740991,
      -          "minimum": -9007199254740991,
      -          "type": "integer"
      -        }
      -      },
      -      "type": "object"
      -    }
      -  },
      -  "type": "object"
      -}
    • removedInput schema / properties / scenarios
      Removed value: -{
      -  "items": {
      -    "additionalProperties": false,
      -    "properties": {
      -      "changes": {
      -        "additionalProperties": false,
      -        "properties": {
      -          "accessIssues": {
      -            "type": "boolean"
      -          },
      -          "additionalInternalWorkPackages": {
      -            "items": {
      -              "enum": [
      -                "Plastering",
      -                "Painting & decorating",
      -                "Wood / laminate flooring",
      -                "Kitchen work",
      -                "Bathroom work",
      -                "Windows / doors / glazing",
      -                "External walls / insulation",
      -                "General building / making good"
      -              ],
      -              "type": "string"
      -            },
      -            "maxItems": 12,
      -            "type": "array"
      -          },
      -          "additionalInternalWorksArea": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "approximateSize": {
      -            "description": "Area in square metres, using the work type's area definition.",
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "availability": {
      -            "enum": [
      -              "Ready now",
      -              "2–4 weeks",
      -              "1–2 months",
      -              "3+ months",
      -              "6+ months",
      -              "Next year"
      -            ],
      -            "type": "string"
      -          },
      -          "barnStructureType": {
      -            "enum": [
      -              "Not sure",
      -              "Traditional timber / oak frame",
      -              "Steel portal frame",
      -              "Stone / brick load-bearing walls",
      -              "Mixed structure"
      -            ],
      -            "type": "string"
      -          },
      -          "basementAccess": {
      -            "enum": [
      -              "Direct external access",
      -              "Restricted side / rear access",
      -              "Removal through house",
      -              "Highly constrained urban access"
      -            ],
      -            "type": "string"
      -          },
      -          "basementArea": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "basementBathroomIncluded": {
      -            "type": "boolean"
      -          },
      -          "basementDrainageScope": {
      -            "enum": [
      -              "Existing gravity drainage retained",
      -              "Drainage alterations",
      -              "Pumped drainage required",
      -              "Not confirmed"
      -            ],
      -            "type": "string"
      -          },
      -          "basementGroundwater": {
      -            "enum": [
      -              "No known issue",
      -              "Possible / high water table",
      -              "Known groundwater / water ingress",
      -              "Not confirmed"
      -            ],
      -            "type": "string"
      -          },
      -          "basementHeadroom": {
      -            "enum": [
      -              "No floor lowering",
      -              "Minor lowering up to 300 mm",
      -              "Lowering 300-600 mm",
      -              "Major lowering over 600 mm",
      -              "Not confirmed"
      -            ],
      -            "type": "string"
      -          },
      -          "basementIntendedUse": {
      -            "enum": [
      -              "Storage / utility",
      -              "Habitable room(s)",
      -              "Bedroom / bathroom accommodation",
      -              "Kitchen / living accommodation",
      -              "Separate dwelling / unit"
      -            ],
      -            "type": "string"
      -          },
      -          "basementLightwellCount": {
      -            "maximum": 9007199254740991,
      -            "minimum": -9007199254740991,
      -            "type": "integer"
      -          },
      -          "basementOccupancy": {
      -            "enum": [
      -              "Vacant during works",
      -              "House occupied during works"
      -            ],
      -            "type": "string"
      -          },
      -          "basementScope": {
      -            "enum": [
      -              "Existing basement refurbishment",
      -              "Existing cellar conversion",
      -              "Lower / enlarge existing cellar",
      -              "New basement beneath extension",
      -              "New basement beneath existing house"
      -            ],
      -            "type": "string"
      -          },
      -          "basementStairScope": {
      -            "enum": [
      -              "Existing stair retained",
      -              "Alter existing stair / opening",
      -              "New basement staircase"
      -            ],
      -            "type": "string"
      -          },
      -          "basementStructuralSupport": {
      -            "enum": [
      -              "No underpinning expected",
      -              "Local structural support",
      -              "Sequential underpinning",
      -              "Piled / engineered support",
      -              "Not confirmed"
      -            ],
      -            "type": "string"
      -          },
      -          "basementUtilityIncluded": {
      -            "type": "boolean"
      -          },
      -          "basementWaterproofing": {
      -            "enum": [
      -              "Existing dry system retained",
      -              "Local repairs / upgrades",
      -              "Full tanking system",
      -              "Cavity-drain membrane and pumps",
      -              "Not confirmed"
      -            ],
      -            "type": "string"
      -          },
      -          "bathroomScope": {
      -            "enum": [
      -              "No bathroom work",
      -              "Bathroom allowance",
      -              "New bathroom: supply and install",
      -              "New bathroom: install only",
      -              "Ensuite / shower room",
      -              "WC / cloakroom"
      -            ],
      -            "type": "string"
      -          },
      -          "bedroomCount": {
      -            "maximum": 9007199254740991,
      -            "minimum": -9007199254740991,
      -            "type": "integer"
      -          },
      -          "combinedAdditionalJobType": {
      -            "enum": [
      -              "Rear extension",
      -              "Kitchen extension",
      -              "Side extension",
      -              "Wraparound extension",
      -              "Loft conversion",
      -              "Barn conversion",
      -              "Refurbishment",
      -              "Office / summerhouse",
      -              "Garage conversion",
      -              "Basement work / conversion",
      -              "New build"
      -            ],
      -            "type": "string"
      -          },
      -          "combinedAdditionalSize": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "combinedPrimaryJobType": {
      -            "enum": [
      -              "Rear extension",
      -              "Kitchen extension",
      -              "Side extension",
      -              "Wraparound extension",
      -              "Loft conversion",
      -              "Barn conversion",
      -              "Refurbishment",
      -              "Office / summerhouse",
      -              "Garage conversion",
      -              "Basement work / conversion",
      -              "New build"
      -            ],
      -            "type": "string"
      -          },
      -          "commercialAsbestosStatus": {
      -            "enum": [
      -              "Refurbishment survey clear",
      -              "Management survey only",
      -              "Survey required / not confirmed",
      -              "Known asbestos constraints"
      -            ],
      -            "type": "string"
      -          },
      -          "commercialBuildingAccess": {
      -            "enum": [
      -              "Standalone / direct street access",
      -              "Shared building, straightforward access",
      -              "Managed building / booked access",
      -              "Constrained central-London access"
      -            ],
      -            "type": "string"
      -          },
      -          "commercialDataScope": {
      -            "enum": [
      -              "No data / comms work",
      -              "Data points and Wi-Fi alterations",
      -              "New structured cabling, Wi-Fi and comms cabinet"
      -            ],
      -            "type": "string"
      -          },
      -          "commercialElectricalScope": {
      -            "enum": [
      -              "Retain existing / minor electrical works",
      -              "Lighting and small-power alterations",
      -              "New lighting, power and floor-box layout"
      -            ],
      -            "type": "string"
      -          },
      -          "commercialFireSecurityScope": {
      -            "enum": [
      -              "Existing systems retained",
      -              "Fire-safety alterations and interfaces",
      -              "Fire, access control, intercom and security package"
      -            ],
      -            "type": "string"
      -          },
      -          "commercialFloorAccess": {
      -            "enum": [
      -              "Ground / first floor",
      -              "Upper floors with goods lift",
      -              "Upper floors with passenger lift only",
      -              "Upper floors by stairs only",
      -              "Multiple floors"
      -            ],
      -            "type": "string"
      -          },
      -          "commercialFurnitureIncluded": {
      -            "type": "boolean"
      -          },
      -          "commercialHvacScope": {
      -            "enum": [
      -              "Retain existing HVAC",
      -              "Alter existing AC / ventilation",
      -              "New or substantially replaced HVAC"
      -            ],
      -            "type": "string"
      -          },
      -          "commercialKitchenetteCount": {
      -            "maximum": 9007199254740991,
      -            "minimum": -9007199254740991,
      -            "type": "integer"
      -          },
      -          "commercialLandlordStatus": {
      -            "enum": [
      -              "Approval confirmed / not needed",
      -              "Licence to alter in progress",
      -              "Approval not started",
      -              "Not sure"
      -            ],
      -            "type": "string"
      -          },
      -          "commercialOccupancy": {
      -            "enum": [
      -              "Vacant during works",
      -              "Phased / partly occupied",
      -              "Fully occupied live office",
      -              "Out-of-hours works only"
      -            ],
      -            "type": "string"
      -          },
      -          "commercialPartitionsScope": {
      -            "enum": [
      -              "Retain layout / minor making good",
      -              "Some partitions and ceiling alterations",
      -              "Extensive partitions and suspended ceilings"
      -            ],
      -            "type": "string"
      -          },
      -          "commercialWashroomCount": {
      -            "maximum": 9007199254740991,
      -            "minimum": -9007199254740991,
      -            "type": "integer"
      -          },
      -          "commercialWorkstationCount": {
      -            "maximum": 9007199254740991,
      -            "minimum": -9007199254740991,
      -            "type": "integer"
      -          },
      -          "complexGroundworks": {
      -            "type": "boolean"
      -          },
      -          "decoratingDoorCount": {
      -            "maximum": 9007199254740991,
      -            "minimum": -9007199254740991,
      -            "type": "integer"
      -          },
      -          "decoratingWindowCount": {
      -            "maximum": 9007199254740991,
      -            "minimum": -9007199254740991,
      -            "type": "integer"
      -          },
      -          "doorCount": {
      -            "maximum": 9007199254740991,
      -            "minimum": -9007199254740991,
      -            "type": "integer"
      -          },
      -          "externalWallArea": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "finishBand": {
      -            "enum": [
      -              "Builder grade",
      -              "Good domestic",
      -              "Premium domestic"
      -            ],
      -            "type": "string"
      -          },
      -          "includesAdditionalInternalWorks": {
      -            "type": "boolean"
      -          },
      -          "includesBasementWork": {
      -            "type": "boolean"
      -          },
      -          "includesLowerGroundWork": {
      -            "type": "boolean"
      -          },
      -          "kitchenScope": {
      -            "enum": [
      -              "No kitchen work",
      -              "Kitchen allowance",
      -              "New kitchen: supply and install",
      -              "New kitchen: install only",
      -              "Client-supplied kitchen, builder prepares room",
      -              "Kitchen / diner works"
      -            ],
      -            "type": "string"
      -          },
      -          "lowerGroundAccess": {
      -            "enum": [
      -              "Direct external access",
      -              "Access through main home",
      -              "Constrained access"
      -            ],
      -            "type": "string"
      -          },
      -          "lowerGroundArea": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "lowerGroundDaylight": {
      -            "enum": [
      -              "Existing windows retained",
      -              "Alter or enlarge openings",
      -              "New lightwell / external excavation",
      -              "Not confirmed"
      -            ],
      -            "type": "string"
      -          },
      -          "lowerGroundExposure": {
      -            "enum": [
      -              "Mostly above ground",
      -              "Split-level / partly below ground",
      -              "Mostly below ground"
      -            ],
      -            "type": "string"
      -          },
      -          "lowerGroundMoisture": {
      -            "enum": [
      -              "Dry / no known issue",
      -              "Local damp repairs",
      -              "Known damp / waterproofing work",
      -              "Not confirmed"
      -            ],
      -            "type": "string"
      -          },
      -          "lowerGroundOccupancy": {
      -            "enum": [
      -              "Vacant during works",
      -              "House occupied during works"
      -            ],
      -            "type": "string"
      -          },
      -          "lowerGroundScope": {
      -            "enum": [
      -              "Refresh existing finished rooms",
      -              "Refurbish existing habitable floor",
      -              "Convert existing ancillary / storage rooms"
      -            ],
      -            "type": "string"
      -          },
      -          "lowerGroundServices": {
      -            "enum": [
      -              "Existing services retained",
      -              "Alter existing services",
      -              "New kitchen / bathroom services",
      -              "Independent services / meters"
      -            ],
      -            "type": "string"
      -          },
      -          "lowerGroundUse": {
      -            "enum": [
      -              "Part of the main home",
      -              "Dependent annexe",
      -              "Separate dwelling / unit"
      -            ],
      -            "type": "string"
      -          },
      -          "parkingSpaces": {
      -            "maximum": 9007199254740991,
      -            "minimum": -9007199254740991,
      -            "type": "integer"
      -          },
      -          "planningStageOnly": {
      -            "type": "boolean"
      -          },
      -          "propertyForm": {
      -            "enum": [
      -              "Flat",
      -              "Maisonette",
      -              "Terraced house",
      -              "Semi-detached house",
      -              "Detached house",
      -              "Barn / agricultural building",
      -              "Other / not sure",
      -              "Commercial office",
      -              "Office suite"
      -            ],
      -            "type": "string"
      -          },
      -          "propertyPeriod": {
      -            "enum": [
      -              "Not sure",
      -              "Modern / new build",
      -              "1970s-1990s",
      -              "1950s-1960s",
      -              "1930s-1940s",
      -              "Victorian / Edwardian",
      -              "Older / period property",
      -              "Listed / heritage"
      -            ],
      -            "type": "string"
      -          },
      -          "refurbishmentCondition": {
      -            "enum": [
      -              "Good",
      -              "Average",
      -              "Poor",
      -              "Damp / cracks / problematic"
      -            ],
      -            "type": "string"
      -          },
      -          "refurbishmentDecoratingArea": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "refurbishmentFlooringArea": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "refurbishmentPackages": {
      -            "items": {
      -              "enum": [
      -                "Plastering",
      -                "Painting & decorating",
      -                "Wood / laminate flooring",
      -                "Kitchen work",
      -                "Bathroom work",
      -                "Windows / doors / glazing",
      -                "External walls / insulation",
      -                "General building / making good"
      -              ],
      -              "type": "string"
      -            },
      -            "maxItems": 12,
      -            "type": "array"
      -          },
      -          "refurbishmentPlasteringArea": {
      -            "minimum": 0,
      -            "type": "number"
      -          },
      -          "refurbishmentPrepLevel": {
      -            "enum": [
      -              "Simple refresh",
      -              "Normal prep",
      -              "Heavy prep"
      -            ],
      -            "type": "string"
      -          },
      -          "refurbishmentRoomState": {
      -            "enum": [
      -              "Empty",
      -              "Partly furnished",
      -              "Occupied"
      -            ],
      -            "type": "string"
      -          },
      -          "refurbishmentScope": {
      -            "enum": [
      -              "General refurbishment",
      -              "Mixed room upgrade",
      -              "Decoration only",
      -              "External walls / insulation",
      -              "Windows / doors / glazing",
      -              "Kitchen works",
      -              "Bathroom works",
      -              "Kitchen and bathroom works",
      -              "Whole property refurbishment"
      -            ],
      -            "type": "string"
      -          },
      -          "roomCount": {
      -            "maximum": 9007199254740991,
      -            "minimum": -9007199254740991,
      -            "type": "integer"
      -          },
      -          "scopeBand": {
      -            "enum": [
      -              "Lean",
      -              "Balanced",
      -              "Expanded"
      -            ],
      -            "type": "string"
      -          },
      -          "structuralSteelLikely": {
      -            "type": "boolean"
      -          },
      -          "urgencyBand": {
      -            "enum": [
      -              "Flexible",
      -              "Soon",
      -              "Urgent"
      -            ],
      -            "type": "string"
      -          },
      -          "windowCount": {
      -            "maximum": 9007199254740991,
      -            "minimum": -9007199254740991,
      -            "type": "integer"
      -          }
      -        },
      -        "type": "object"
      -      },
      -      "label": {
      -        "enum": [
      -          "Option 1",
      -          "Option 2",
      -          "Option 3"
      -        ],
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "label",
      -      "changes"
      -    ],
      -    "type": "object"
      -  },
      -  "maxItems": 3,
      -  "minItems": 1,
      -  "type": "array"
      -}
    • removedInput schema / required
      Removed value: -[
      -  "baseline",
      -  "scenarios"
      -]
  7. First observed

TDQS

A4.2/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare destructive=false and openWorld=false, and the description adds scope guards beyond them: no foreign-rate conversion and no saved-project access, plus the return shape ('original comparison card and deltas'). It does not explain why readOnlyHint=false on what looks like a compute operation, but it does not contradict the annotations either.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Four tight sentences, front-loaded with the core purpose and immediately following with the alternative routing and scope exclusions. No filler, though the final sentence's two constraints could be folded into the routing sentence.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so the description needn't detail the comparison card contents, and it correctly avoids that. Given the deeply nested baseline/scope schema, however, an agent gets no guidance on parameter structure or the required baseline-plus-scenarios relationship, leaving a gap for a two-required-param tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Top-level schema description coverage is 0%: neither 'baseline' nor 'scenarios' is explained in either the schema or the description. The description says nothing about how a baseline relates to scenario deltas, that scenarios are capped at three labeled options ('Option 1/2/3'), or that 'changes' overrides baseline values. With low coverage, the description should compensate here and does not.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description names a specific verb and resource ('Compare GB/US Guide Price scenarios') and scopes it to existing policies, which cleanly separates it from calculate_guide_price and calculate_building_work. An agent can identify the function without opening the schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It gives an explicit trigger ('when the user explicitly asks to compare alternatives within those existing policies') and names the alternative for the excluded cases ('For other countries or drawing-based refinements, use calculate_building_work with each requested scenario'). Both when-to-use and when-not-to-use are stated.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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