Proper Job Building Cost Calculator

Calculate building work

calculate_building_work

Read-onlyIdempotent

Use this when a user asks the cost of building, extending or renovating a home, remodelling a kitchen/bathroom, refining a budget or costing drawings, even without naming Proper Job. Computes repeatable local-currency estimates using versioned country-specific construction benchmarks, scope and allowance rules, checked measurement conversions and source-cited drawing quantities. Returns an interactive budget card, tax basis, exclusions and one short refinement; unknown details stay optional. Supported work: GB, US, AU, NZ, IE, DE, FR, ES, CA, JP, IN; exact scope limits are in the schema and market-coverage resource. Do not substitute UK rates or exchange-rate conversions. Read the drawing skill before host-only attachment analysis; send reconciled structured facts in one call. Detailed trade costing is GB-only; other countries still accept drawing quantities. Reuse unchanged results and use the returned price without inventing or narrowing it. Country, language and units are independent. Do not use for property valuations, land-price discovery, account/project lookup, purchases, issued quotes or legal/safety certification.

Input Schema

TableJSON Schema

Name	Required	Description
`land`	No	IN only. Optional separate plot and user-supplied INR purchase price/rate, upfront lease premium, yearly rent and fees. Land area never becomes building floor area. Unknown land prices stay unpriced without blocking the construction estimate. Official valuation is a reference, never treated as market purchase cost. No generic bigha/ground/marla conversion; ask for the local conversion. State rules/title/lease rights need local verification.
`scope`	No	Only known project facts. All area fields share areaUnit. JP accepts tsubo (坪), tatami/jo/jou/畳/帖. Tsubo is 400/121 m2; tatami defaults to approximately 1.62 m2. Room labels such as LDK 12畳 are that room's area, not the whole apartment. Use dimensioned m2 where supplied. Physical replacement-mat counts are not floor areas. Prefer worksLevel over legacy finishBand/finishLevel.
`state`	No	US two-letter state or DC code.
`country`	No	Two-letter country code. GB/UK and US/USA have existing guide policies; AU/NZ have limited residential benchmarks; IE has extension guides and matching Dublin project ranges; DE has rough new-home guides and separate unscaled manufacturer examples. FR has new homes and whole-home renovation; ES whole-home/kitchen/bathroom renovation; CA new homes and whole-home renovation. JP new homes, whole-home/akiya renovation and kitchen/bathroom work. IN rural shelters, masonry/RCC new homes and whole-home renovation with separate user-priced land/lease costs. Other countries return unpriced quantities. EU needs a member country. SA means Saudi Arabia; ZA is South Africa. Units never determine country.
`jobType`	No	Residential project type supported by the selected country policy.
`zipCode`	No	Optional US five-digit ZIP code. Never send a street address.
`currency`	No	Optional currency check against a known market. No exchange or borrowed foreign rates. Unknown market currency does not enable pricing.
`drawings`	No	Structured analysis performed by the host on the user's attachments. No file URLs, file bytes, account IDs or extraction API calls are accepted.
`language`	No	Card and follow-up language from the conversation, e.g. fr-CA, es, de, it, pt, ja or hi. English fallback for unsupported languages. Never infer country, currency or units from language.
`usDetails`	No	US only, optional scope facts. Never ask the user to complete a form. Missing details widen the estimate. Kitchen/bathroom jobs cover one room; counts are for whole-home/addition/new-home scope.
`localScope`	No	AU/NZ/IE/DE only. Send confirmed facts; never copy provisional assumptions as user answers. AU uses separate project/custom and one/two-storey house anchors, plus counted extension fitout. NZ wet-area extensions count the first standard wet room once; additional declared rooms use local references. IE uses a fixed Dublin bucket only for matching scope; other extensions use a broader Irish build guide. DE has a broad new-home guide; named manufacturer examples are never scaled to the user's area.
`regionCode`	No	AU new-home city: SYD/MEL/BNE/CBR/ADL/PER/HBA/CNS/DRW. AU extensions are national. NZ national guides; AKL/CAN/QLDC/OTA have selected home anchors; Auckland extensions have their own source. IE: DUB retains a 25–35 m² rear-extension reference; other extension sizes/forms/regions use wider Irish builder guides. DE: a broad native-EUR new-house guide; an explicitly matching prefab bungalow can show a manufacturer example (mainland only). FR new homes: ARA/BFC/BRE/CVL/COR/GES/HDF/IDF/NOR/NAQ/OCC/PDL/PAC, FR- prefix accepted; renovation has no city factors. ES broad region. JP: JP-01 through JP-47 or CAPITAL/KINKI/TOKAI/OTHER. CA: province/territory code, e.g. ON/BC/QC. Ontario custom-home anchors extrapolate broadly elsewhere. IN accepts state/UT codes such as IN-KA, IN-AS, IN-HP; these select jurisdiction, not an exact state cost index. US uses state. Do not infer a city from a state or send an address.
`worksLevel`	No	Level of materials, finishes and detailing: Budget, Standard, Premium or Luxury. US/FR/ES/CA/JP/IN Luxury returns a wide rough starting range, not a ceiling; bespoke details need individual pricing. Other markets retain their published reference limits. This does not change the amount of work.
`displayUnits`	No	Preferred quantity display, independent of pricing market/currency. All scope area fields use scope.areaUnit; drawing quantities each carry their own unit.
`indiaDetails`	No	IN only: optional known construction/site facts. Simple local-material hut, durable rural masonry and RCC home have distinct INR models. Rural never implies poor road access. State alone does not prove climate/hazard. Ordinary construction is counted once; only stated extra protection is added. Missing facts give a rough price. Rates/allowances are estimates, not safety certification or state cost schedules.
`japanDetails`	No	JP only: optional facts from the user/drawings about new homes, renovations and vacant homes (akiya). Existing age or timber construction never certifies earthquake safety. Ordinary new-build seismic/energy provisions are included once; explicit retrofit/enhancement is separate. Leasehold land premiums, ground rent and consent costs stay outside building work. Unknown facts still return a rough price.
`postcodeArea`	No	GB outward postcode only, for example BS3. Never send a full address.
`projectDetails`	No	FR/CA: optional declared work extent, access, climate, ground, construction and upgrade facts. AlreadyIncluded flags suppress the corresponding allowance only when the supplied scope already contains that work. Ordinary local code/climate provisions are already in the base. Never infer permafrost from country or remote access from rural location. ES accepts workExtent only. Missing details widen the price; never require a questionnaire.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`data`	No
`error`	No
`status`	Yes
`schemaVersion`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed24 schema fields changedOct 8, 2026

changedInput schema / properties / country / description

Previous value: -"Two-letter country code. GB/UK and US/USA have existing guide policies; AU/NZ have limited residential benchmarks; IE has Dublin rear-extension project ranges; DE has named prefabricated bungalow examples only, not project estimates. FR has new homes and whole-home renovation; ES whole-home/kitchen/bathroom renovation; CA new homes and whole-home renovation. JP new homes, whole-home/akiya renovation and kitchen/bathroom work. IN rural shelters, masonry/RCC new homes and whole-home renovation with separate user-priced land/lease costs. Other countries return unpriced quantities. EU needs a member country. SA means Saudi Arabia; ZA is South Africa. Units never determine country."New value: +"Two-letter country code. GB/UK and US/USA have existing guide policies; AU/NZ have limited residential benchmarks; IE has extension guides and matching Dublin project ranges; DE has rough new-home guides and separate unscaled manufacturer examples. FR has new homes and whole-home renovation; ES whole-home/kitchen/bathroom renovation; CA new homes and whole-home renovation. JP new homes, whole-home/akiya renovation and kitchen/bathroom work. IN rural shelters, masonry/RCC new homes and whole-home renovation with separate user-priced land/lease costs. Other countries return unpriced quantities. EU needs a member country. SA means Saudi Arabia; ZA is South Africa. Units never determine country."

changed

Input schema / properties / drawings / properties / observations / items / properties / calculationInputs / items / properties / unit / enum

Previous value: -[
-  "m",
-  "mm",
-  "cm",
-  "ft",
-  "in",
-  "yd",
-  "m2",
-  "sq_m",
-  "ft2",
-  "sq_ft",
-  "yd2",
-  "tsubo",
-  "m3",
-  "ft3",
-  "yd3",
-  "number",
-  "item",
-  "set",
-  "unknown"
-]New value: +[
+  "m",
+  "mm",
+  "cm",
+  "ft",
+  "in",
+  "yd",
+  "m2",
+  "sq_m",
+  "ft2",
+  "sq_ft",
+  "yd2",
+  "tsubo",
+  "m3",
+  "ft3",
+  "yd3",
+  "number",
+  "item",
+  "set",
+  "unknown",
+  "tatami",
+  "jo",
+  "jou",
+  "畳",
+  "帖"
+]

addedInput schema / properties / drawings / properties / observations / items / properties / tatamiSize

Added value: +{
+  "description": "For tatami area only: use a supplied mat convention; otherwise use the approximate listing convention. Physical mat counts use item/number, not an area unit.",
+  "enum": [
+    "listing",
+    "edoma",
+    "kyoma",
+    "chukyoma",
+    "danchima"
+  ],
+  "type": "string"
+}

changedInput schema / properties / drawings / properties / observations / items / properties / unit / enum

Previous value: -[
-  "m",
-  "mm",
-  "cm",
-  "ft",
-  "in",
-  "yd",
-  "m2",
-  "sq_m",
-  "ft2",
-  "sq_ft",
-  "yd2",
-  "tsubo",
-  "m3",
-  "ft3",
-  "yd3",
-  "number",
-  "item",
-  "set",
-  "unknown"
-]New value: +[
+  "m",
+  "mm",
+  "cm",
+  "ft",
+  "in",
+  "yd",
+  "m2",
+  "sq_m",
+  "ft2",
+  "sq_ft",
+  "yd2",
+  "tsubo",
+  "m3",
+  "ft3",
+  "yd3",
+  "number",
+  "item",
+  "set",
+  "unknown",
+  "tatami",
+  "jo",
+  "jou",
+  "畳",
+  "帖"
+]

addedInput schema / properties / japanDetails / properties / layout

Added value: +{
+  "description": "Stated Japanese layout, e.g. 1R, 1K, 1DK, 1LDK, 2LDK, 2SLDK or 2LDK+S. Optional; unfamiliar labels do not block the estimate. The number counts habitable rooms excluding K/DK/LDK; S/N denotes service/storage rooms, not certified bedrooms. Never derive floor area, bathrooms, replacement mat counts or the number of rooms being renovated from layout alone.",
+  "maxLength": 80,
+  "minLength": 1,
+  "type": "string"
+}

changedInput schema / properties / localScope / description

Previous value: -"AU/NZ/IE/DE only. Send confirmed facts; never copy provisional assumptions as user answers. AU adds counted wet fitout; NZ wet-area rates include wet scope. IE uses a fixed 25–35 m² project range, not a scalable per-m² rate. DE examples are not scaled to the user's area."New value: +"AU/NZ/IE/DE only. Send confirmed facts; never copy provisional assumptions as user answers. AU uses separate project/custom and one/two-storey house anchors, plus counted extension fitout. NZ wet-area extensions count the first standard wet room once; additional declared rooms use local references. IE uses a fixed Dublin bucket only for matching scope; other extensions use a broader Irish build guide. DE has a broad new-home guide; named manufacturer examples are never scaled to the user's area."

addedInput schema / properties / localScope / properties / access

Added value: +{
+  "enum": [
+    "straightforward",
+    "constrained",
+    "remote"
+  ],
+  "type": "string"
+}

addedInput schema / properties / localScope / properties / accessAlreadyIncluded
```
Added value: +{
+  "type": "boolean"
+}
```

changedInput schema / properties / localScope / properties / areaBasis / description

Previous value: -"AU project homes require gross floor area including covered unenclosed space. DE bungalow examples use living floor area (Wohnfläche); never substitute gross area or footprint."New value: +"AU uses gross floor area including covered unenclosed space; known internal/living area retains its measurement and widens an inferred GFA allowance. DE uses living floor area (Wohnfläche); gross area uses a wider guide and is never asserted equivalent. Manufacturer examples require the stated living area."

addedInput schema / properties / localScope / properties / energyUpgrade
```
Added value: +{
+  "type": "boolean"
+}
```

changedInput schema / properties / localScope / properties / extensionForm / description

Previous value: -"IE: the Dublin range covers rear extensions only. Confirm form when using home_addition."New value: +"IE: rear, side or wraparound; affects the guide. Send total floor area across all storeys, not the footprint."

addedInput schema / properties / localScope / properties / hazardProtection

Added value: +{
+  "enum": [
+    "ordinary",
+    "bushfire",
+    "cyclone",
+    "seismic"
+  ],
+  "type": "string"
+}

addedInput schema / properties / localScope / properties / protectionAlreadyIncluded
```
Added value: +{
+  "type": "boolean"
+}
```

addedInput schema / properties / localScope / properties / siteConditions

Added value: +{
+  "enum": [
+    "ordinary",
+    "sloping",
+    "difficult_ground",
+    "liquefaction"
+  ],
+  "type": "string"
+}

addedInput schema / properties / localScope / properties / siteCostsAlreadyIncluded
```
Added value: +{
+  "type": "boolean"
+}
```

changedInput schema / properties / projectDetails / description

Previous value: -"FR/CA: optional declared work extent, access, climate, ground, construction and upgrade facts. Ordinary local code/climate provisions are already in the base; exceptional work uses disclosed broad allowances. Never infer permafrost from country or remote access from rural location. ES accepts workExtent only. Missing details widen the price; never require a questionnaire."New value: +"FR/CA: optional declared work extent, access, climate, ground, construction and upgrade facts. AlreadyIncluded flags suppress the corresponding allowance only when the supplied scope already contains that work. Ordinary local code/climate provisions are already in the base. Never infer permafrost from country or remote access from rural location. ES accepts workExtent only. Missing details widen the price; never require a questionnaire."

addedInput schema / properties / projectDetails / properties / accessAlreadyIncluded
```
Added value: +{
+  "type": "boolean"
+}
```
addedInput schema / properties / projectDetails / properties / envelopeAlreadyIncluded
```
Added value: +{
+  "type": "boolean"
+}
```
addedInput schema / properties / projectDetails / properties / siteCostsAlreadyIncluded
```
Added value: +{
+  "type": "boolean"
+}
```
addedInput schema / properties / projectDetails / properties / structureAlreadyIncluded
```
Added value: +{
+  "type": "boolean"
+}
```

changedInput schema / properties / regionCode / description

Previous value: -"AU project-home city: SYD/MEL/BNE/CBR/ADL/PER/HBA/CNS/DRW. AU extensions are national. NZ homes: AKL/CAN/QLDC/OTA; NZ extensions: AKL only. IE extension guide: DUB only (Dublin, Republic of Ireland). DE examples exclude islands: use ISLANDS if relevant; no regional adjustment. FR new homes: ARA/BFC/BRE/CVL/COR/GES/HDF/IDF/NOR/NAQ/OCC/PDL/PAC, FR- prefix accepted; renovation has no city factors. ES broad region. JP: JP-01 through JP-47 or CAPITAL/KINKI/TOKAI/OTHER. CA: province/territory code, e.g. ON/BC/QC. Ontario custom-home anchors extrapolate broadly elsewhere. IN accepts state/UT codes such as IN-KA, IN-AS, IN-HP; these select jurisdiction, not an exact state cost index. US uses state. Do not infer a city from a state or send an address."New value: +"AU new-home city: SYD/MEL/BNE/CBR/ADL/PER/HBA/CNS/DRW. AU extensions are national. NZ national guides; AKL/CAN/QLDC/OTA have selected home anchors; Auckland extensions have their own source. IE: DUB retains a 25–35 m² rear-extension reference; other extension sizes/forms/regions use wider Irish builder guides. DE: a broad native-EUR new-house guide; an explicitly matching prefab bungalow can show a manufacturer example (mainland only). FR new homes: ARA/BFC/BRE/CVL/COR/GES/HDF/IDF/NOR/NAQ/OCC/PDL/PAC, FR- prefix accepted; renovation has no city factors. ES broad region. JP: JP-01 through JP-47 or CAPITAL/KINKI/TOKAI/OTHER. CA: province/territory code, e.g. ON/BC/QC. Ontario custom-home anchors extrapolate broadly elsewhere. IN accepts state/UT codes such as IN-KA, IN-AS, IN-HP; these select jurisdiction, not an exact state cost index. US uses state. Do not infer a city from a state or send an address."

changedInput schema / properties / scope / description

Previous value: -"Only known project facts. All area fields share areaUnit. JP also accepts tsubo (坪); one tsubo is 400/121 square metres. Prefer worksLevel over legacy finishBand/finishLevel."New value: +"Only known project facts. All area fields share areaUnit. JP accepts tsubo (坪), tatami/jo/jou/畳/帖. Tsubo is 400/121 m2; tatami defaults to approximately 1.62 m2. Room labels such as LDK 12畳 are that room's area, not the whole apartment. Use dimensioned m2 where supplied. Physical replacement-mat counts are not floor areas. Prefer worksLevel over legacy finishBand/finishLevel."

changedInput schema / properties / scope / properties / areaUnit / anyOf

Previous value: -[
-  {
-    "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"
-  },
-  {
-    "const": "tsubo",
-    "type": "string"
-  }
-]New value: +[
+  {
+    "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"
+  },
+  {
+    "enum": [
+      "tsubo",
+      "tatami",
+      "jo",
+      "jou",
+      "畳",
+      "帖"
+    ],
+    "type": "string"
+  }
+]

addedInput schema / properties / scope / properties / tatamiSize

Added value: +{
+  "description": "JP tatami area only. Optional listing, edoma, kyoma, chukyoma or danchima convention, only if explicitly known. Otherwise the calculator uses an approximate 1.62 m2 per tatami listing basis; never infer a physical mat type from prefecture or apartment type.",
+  "enum": [
+    "listing",
+    "edoma",
+    "kyoma",
+    "chukyoma",
+    "danchima"
+  ],
+  "type": "string"
+}

Changed4 schema fields changedOct 8, 2026

changedInput schema / properties / country / description

Previous value: -"Two-letter country code. GB/UK and US/USA have existing guide policies; AU/NZ have limited residential benchmarks; IE has Dublin rear-extension project ranges; DE has named prefabricated bungalow examples only, not project estimates. FR has new homes and whole-home renovation; ES whole-home/kitchen/bathroom renovation; CA new homes and whole-home renovation. JP new homes and residential renovation/akiya. IN rural shelters, masonry/RCC new homes and whole-home renovation with separate user-priced land/lease costs. Other countries return unpriced quantities. EU needs a member country. SA means Saudi Arabia; ZA is South Africa. Units never determine country."New value: +"Two-letter country code. GB/UK and US/USA have existing guide policies; AU/NZ have limited residential benchmarks; IE has Dublin rear-extension project ranges; DE has named prefabricated bungalow examples only, not project estimates. FR has new homes and whole-home renovation; ES whole-home/kitchen/bathroom renovation; CA new homes and whole-home renovation. JP new homes, whole-home/akiya renovation and kitchen/bathroom work. IN rural shelters, masonry/RCC new homes and whole-home renovation with separate user-priced land/lease costs. Other countries return unpriced quantities. EU needs a member country. SA means Saudi Arabia; ZA is South Africa. Units never determine country."

addedInput schema / properties / drawings / properties / observations / items / properties / parentScopeEntity

Added value: +{
+  "description": "Optional explicitly evidenced containing scope, e.g. kitchen inside whole_home. Supply only when the drawing/brief establishes containment. Keep separate buildings unparented. Never use this to force unrelated floor areas into the main project.",
+  "pattern": "^[a-zA-Z0-9_-]{1,80}$",
+  "type": "string"
+}

addedInput schema / properties / japanDetails / properties / bathroomType

Added value: +{
+  "description": "Existing bathroom type; conventional tiled-bath conversion differs from replacing a unit bath. Unknown stays optional.",
+  "enum": [
+    "unit_bath",
+    "conventional_bath"
+  ],
+  "type": "string"
+}

addedInput schema / properties / japanDetails / properties / roomCount

Added value: +{
+  "description": "Kitchen/bathroom renovation only: number of rooms the user wants worked on. Default one if unknown. Do not infer bathrooms from a combined bathroom/WC drawing count or building floor area.",
+  "maximum": 20,
+  "minimum": 1,
+  "type": "integer"
+}

Changed3 schema fields changedOct 7, 2026

addedInput schema / properties / drawings / properties / observations / items / properties / label / description

Added value: +"Human-readable work label in the conversation language. Keep literal drawing wording in sourceReference."

changedInput schema / properties / drawings / properties / observations / items / properties / scopeEntity / description

Previous value: -"Separate construction entity, e.g. rear_extension or garage. Do not merge separate buildings."New value: +"Stable separate building/scope ID. For main residential pricing use whole_home for whole-home renovation, new_home for a new house, home_addition/rear_extension for an addition, kitchen or bathroom for a single-room remodel. Keep garages, annexes and separate buildings separate; do not invent a primary-scope label or merge areas."

addedInput schema / properties / drawings / properties / unresolvedItems / items / properties / description / description
```
Added value: +"Human-readable issue in the conversation language; preserve literal evidence in sourceReference."
```

Changed6 schema fields changedOct 7, 2026

changedInput schema / properties / country / description

Previous value: -"Two-letter country code. GB/UK and US/USA have existing guide policies; AU/NZ have limited residential benchmarks; IE has Dublin rear-extension project ranges; DE has named prefabricated bungalow examples only, not project estimates. FR has new homes and whole-home renovation; ES whole-home/kitchen/bathroom renovation; CA new homes and whole-home renovation. JP new homes and residential renovation/akiya. Other countries return unpriced quantities. EU needs a member country. SA means Saudi Arabia; ZA is South Africa. Units never determine country."New value: +"Two-letter country code. GB/UK and US/USA have existing guide policies; AU/NZ have limited residential benchmarks; IE has Dublin rear-extension project ranges; DE has named prefabricated bungalow examples only, not project estimates. FR has new homes and whole-home renovation; ES whole-home/kitchen/bathroom renovation; CA new homes and whole-home renovation. JP new homes and residential renovation/akiya. IN rural shelters, masonry/RCC new homes and whole-home renovation with separate user-priced land/lease costs. Other countries return unpriced quantities. EU needs a member country. SA means Saudi Arabia; ZA is South Africa. Units never determine country."

addedInput schema / properties / indiaDetails

Added value: +{
+  "additionalProperties": false,
+  "description": "IN only: optional known construction/site facts. Simple local-material hut, durable rural masonry and RCC home have distinct INR models. Rural never implies poor road access. State alone does not prove climate/hazard. Ordinary construction is counted once; only stated extra protection is added. Missing facts give a rough price. Rates/allowances are estimates, not safety certification or state cost schedules.",
+  "properties": {
+    "access": {
+      "enum": [
+        "normal",
+        "remote_road",
+        "no_vehicle_access",
+        "seasonal_or_island"
+      ],
+      "type": "string"
+    },
+    "climate": {
+      "enum": [
+        "ordinary",
+        "hot_dry",
+        "humid_monsoon",
+        "cold_snow"
+      ],
+      "type": "string"
+    },
+    "climateAlreadyIncluded": {
+      "type": "boolean"
+    },
+    "construction": {
+      "enum": [
+        "vernacular_hut",
+        "rural_masonry",
+        "rcc_home"
+      ],
+      "type": "string"
+    },
+    "hazard": {
+      "enum": [
+        "ordinary",
+        "enhanced_seismic",
+        "cyclone_exposed",
+        "flood_exposed"
+      ],
+      "type": "string"
+    },
+    "hazardAlreadyIncluded": {
+      "type": "boolean"
+    },
+    "landUse": {
+      "enum": [
+        "residential",
+        "agricultural",
+        "protected_or_tribal",
+        "unknown"
+      ],
+      "type": "string"
+    },
+    "setting": {
+      "enum": [
+        "rural",
+        "town",
+        "metro",
+        "high_cost_metro"
+      ],
+      "type": "string"
+    },
+    "siteConditions": {
+      "enum": [
+        "ordinary",
+        "difficult_ground"
+      ],
+      "type": "string"
+    },
+    "workExtent": {
+      "enum": [
+        "refresh",
+        "partial",
+        "full"
+      ],
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

addedInput schema / properties / land

Added value: +{
+  "additionalProperties": false,
+  "description": "IN only. Optional separate plot and user-supplied INR purchase price/rate, upfront lease premium, yearly rent and fees. Land area never becomes building floor area. Unknown land prices stay unpriced without blocking the construction estimate. Official valuation is a reference, never treated as market purchase cost. No generic bigha/ground/marla conversion; ask for the local conversion. State rules/title/lease rights need local verification.",
+  "properties": {
+    "annualRent": {
+      "additionalProperties": false,
+      "properties": {
+        "high": {
+          "maximum": 1000000000000,
+          "minimum": 0,
+          "type": "number"
+        },
+        "low": {
+          "maximum": 1000000000000,
+          "minimum": 0,
+          "type": "number"
+        }
+      },
+      "required": [
+        "low",
+        "high"
+      ],
+      "type": "object"
+    },
+    "areaUnit": {
+      "enum": [
+        "sq_m",
+        "sq_ft",
+        "acre",
+        "hectare"
+      ],
+      "type": "string"
+    },
+    "fees": {
+      "additionalProperties": false,
+      "properties": {
+        "high": {
+          "maximum": 1000000000000,
+          "minimum": 0,
+          "type": "number"
+        },
+        "low": {
+          "maximum": 1000000000000,
+          "minimum": 0,
+          "type": "number"
+        }
+      },
+      "required": [
+        "low",
+        "high"
+      ],
+      "type": "object"
+    },
+    "leasePremium": {
+      "additionalProperties": false,
+      "properties": {
+        "high": {
+          "maximum": 1000000000000,
+          "minimum": 0,
+          "type": "number"
+        },
+        "low": {
+          "maximum": 1000000000000,
+          "minimum": 0,
+          "type": "number"
+        }
+      },
+      "required": [
+        "low",
+        "high"
+      ],
+      "type": "object"
+    },
+    "plotArea": {
+      "exclusiveMinimum": 0,
+      "maximum": 1000000000,
+      "type": "number"
+    },
+    "priceBasis": {
+      "enum": [
+        "asking",
+        "agreed",
+        "official_valuation"
+      ],
+      "type": "string"
+    },
+    "purchasePrice": {
+      "additionalProperties": false,
+      "properties": {
+        "high": {
+          "maximum": 1000000000000,
+          "minimum": 0,
+          "type": "number"
+        },
+        "low": {
+          "maximum": 1000000000000,
+          "minimum": 0,
+          "type": "number"
+        }
+      },
+      "required": [
+        "low",
+        "high"
+      ],
+      "type": "object"
+    },
+    "purchaseRate": {
+      "additionalProperties": false,
+      "properties": {
+        "high": {
+          "maximum": 10000000000,
+          "minimum": 0,
+          "type": "number"
+        },
+        "low": {
+          "maximum": 10000000000,
+          "minimum": 0,
+          "type": "number"
+        },
+        "unit": {
+          "enum": [
+            "sq_m",
+            "sq_ft",
+            "acre",
+            "hectare"
+          ],
+          "type": "string"
+        }
+      },
+      "required": [
+        "low",
+        "high",
+        "unit"
+      ],
+      "type": "object"
+    },
+    "tenure": {
+      "enum": [
+        "owned",
+        "purchase",
+        "leasehold"
+      ],
+      "type": "string"
+    }
+  },
+  "required": [
+    "tenure"
+  ],
+  "type": "object"
+}

changedInput schema / properties / language / description

Previous value: -"Card and follow-up language from the conversation, e.g. fr-CA, es, de, it, pt or ja. English fallback for unsupported languages. Never infer country, currency or units from language."New value: +"Card and follow-up language from the conversation, e.g. fr-CA, es, de, it, pt, ja or hi. English fallback for unsupported languages. Never infer country, currency or units from language."

changedInput schema / properties / regionCode / description

Previous value: -"AU project-home city: SYD/MEL/BNE/CBR/ADL/PER/HBA/CNS/DRW. AU extensions are national. NZ homes: AKL/CAN/QLDC/OTA; NZ extensions: AKL only. IE extension guide: DUB only (Dublin, Republic of Ireland). DE examples exclude islands: use ISLANDS if relevant; no regional adjustment. FR new homes: ARA/BFC/BRE/CVL/COR/GES/HDF/IDF/NOR/NAQ/OCC/PDL/PAC, FR- prefix accepted; renovation has no city factors. ES broad region. JP: JP-01 through JP-47 or CAPITAL/KINKI/TOKAI/OTHER. CA: province/territory code, e.g. ON/BC/QC. Ontario custom-home anchors extrapolate broadly elsewhere. US uses state. Do not infer a city from a state or send an address."New value: +"AU project-home city: SYD/MEL/BNE/CBR/ADL/PER/HBA/CNS/DRW. AU extensions are national. NZ homes: AKL/CAN/QLDC/OTA; NZ extensions: AKL only. IE extension guide: DUB only (Dublin, Republic of Ireland). DE examples exclude islands: use ISLANDS if relevant; no regional adjustment. FR new homes: ARA/BFC/BRE/CVL/COR/GES/HDF/IDF/NOR/NAQ/OCC/PDL/PAC, FR- prefix accepted; renovation has no city factors. ES broad region. JP: JP-01 through JP-47 or CAPITAL/KINKI/TOKAI/OTHER. CA: province/territory code, e.g. ON/BC/QC. Ontario custom-home anchors extrapolate broadly elsewhere. IN accepts state/UT codes such as IN-KA, IN-AS, IN-HP; these select jurisdiction, not an exact state cost index. US uses state. Do not infer a city from a state or send an address."

changedInput schema / properties / worksLevel / description

Previous value: -"Level of materials, finishes and detailing: Budget, Standard, Premium or Luxury. US/FR/ES/CA/JP Luxury returns a wide rough starting range, not a ceiling; bespoke details need individual pricing. Other markets retain their published reference limits. This does not change the amount of work."New value: +"Level of materials, finishes and detailing: Budget, Standard, Premium or Luxury. US/FR/ES/CA/JP/IN Luxury returns a wide rough starting range, not a ceiling; bespoke details need individual pricing. Other markets retain their published reference limits. This does not change the amount of work."

AddedOct 7, 2026

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