Prepare building-permit figures and documents
cao_permisWHEN a detached house is headed for a French BUILDING PERMIT (permis de construire, Cerfa 13406). Drafts the permit file from the CAO scene: the Cerfa figures (surface de plancher per R111-22 — inner face of façades, stair openings and parts under 1.80 m excluded; emprise au sol per R420-1; eaves and ridge heights; storeys), plus PCMI2 site plan, PCMI3 section, PCMI4 written notice and PCMI5 elevations. PCMI1, PCMI6, PCMI7 and PCMI8 (location map, landscape insertion, photos) are listed as 'à fournir' — never invented; a Géoportail link is given when the scene has georef. For an EXTENSION, mark the existing walls existant: true: existing and created areas are then separated, and the file says when a déclaration préalable is enough (up to 20 m² created, 40 m² in a PLU urban zone). Local zoning rules (PLU) are NOT checked. Call cao_verifier first. Returns JSON {cerfa, pieces[], notice[], alertes[], avertissement}; drawings are SVG strings.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| murs | No | Walls: plan segments extruded vertically. Every coordinate in this whole scene is in MILLIMETRES, in a single plan frame whose origin you choose — X to the right, Y upward, Z up from the floor. Keep one consistent origin across murs/boites/plan: the generators never recentre anything for you. | |
| plan | No | 2D reference lines — drawn flat, never extruded and never counted in the quantities. Use them for axes, plot limits or setting-out marks. | |
| coupe | No | Optional section line AA as [x1, y1, x2, y2] in mm (CAO axes). Default: across the building through its stair. | |
| titre | No | Project title shown on the dossier's cover page. | |
| auteur | No | Optional: applicant or designer shown on the cover page. | |
| boites | No | Boxes (furniture, volumes): a rectangular block placed by its CENTRE, not by a corner. Millimetres, same frame as murs[]. | |
| georef | No | Optional Lambert-93 (EPSG:2154) false origin for IfcMapConversion. Local millimetres are scaled by 0.001 to CRS metres. Do not invent coordinates: omit est/nord if unknown (origin stays 0). orientation is the angle in degrees of project X from map East, counterclockwise. | |
| cercles | No | Circles on the 2D plan, alongside plan[] lines: each has a centre and a radius, in the same unit as the plan. Use for round shapes a polyline would render badly — fillets, posts, manholes. | |
| reseaux | No | Plumbing pipe runs (EF/EC/EU/EV/EP/chauffage) — used only by cao_pdf (technical plan + linear-meter quantities per type). | |
| toitures | No | Roofs — used only by cao_pdf. WITHOUT this field: a flat roof is auto-generated over the footprint of ALL walls (legacy default). WITH it: compose freely — each entry can target a subset of walls (via `murs`), letting you build an L-shaped building's roof, or add a dormer on top of a main roof. | |
| plomberie | No | Sanitary fixtures (sink, WC, shower…) — used only by cao_pdf. Same positioning as electricite. | |
| decoration | No | Paint/finish per wall — used only by cao_pdf. Colors the elevations (exterior face) and the axonometric view (face auto-detected by orientation relative to the building's centroid). | |
| ouvertures | No | Doors/windows embedded in a wall — used only by cao_pdf (elevations + axonometric view), no effect on dxf/metres. | |
| electricite | No | Electrical symbols (outlets, switches, lights…) — used only by cao_pdf (dedicated technical plan + quantities), no effect on dxf/metres/render. Position: attached to a wall (`mur`+`position`, like ouvertures) or free (`x`,`y`). | |
| compositions | No | Named wall/slab layer sets declared by the project. A key that matches an inferred kind (mur_exterieur, refend, cloison, plancher, toiture) or murs[].composition drops the Hypothese flag. Each value is {libelle, couches: [{cle, epaisseur?}]}. cle: enduit, bloc_beton, isolant, ba13, ossature, enduit_platre, beton_arme, tuile, charpente, etancheite. Omit epaisseur on the load-bearing layer. |