A regulation hundreds of pages long
A zoning regulation often exceeds 400 pages: finding the articles that apply to YOUR zone takes expert reading.
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Analyse a parcel’s zoning in one report
Zoning, written regulation, graphic prescriptions, easements: GeoAlt gathers the zoning rules that apply to your parcel.
Before any project, you need to know what the local zoning plan allows: zone, height, footprint, setbacks, appearance, easements. The information exists — the Géoportail de l’Urbanisme (GPU) aggregates the enforceable documents — but it is scattered across PDFs of hundreds of pages and theme-by-theme maps. GeoAlt gathers it for a given parcel.
What usually gets in the way
Maps you must overlay yourself
Zoning, graphic prescriptions, SUP easements and various perimeters live in separate layers: the parcel-level synthesis is done by hand.
Rules discovered too late
A forgotten prescription — setback, height, roof appearance — resurfaces at permit filing: the project goes back to square one.
What GeoAlt gathers
- The zone and its regulation
- The zoning applying to the parcel is identified in the enforceable planning document (PLU, PLUi, municipal map), with the link to the source regulation.
- Graphic prescriptions
- Location-specific prescriptions (alignment lines, landscape protections, footprints) are extracted for the queried area.
- Public utility easements
- SUP easements crossing the parcel (lines, pipelines, protection zones) are listed with their category and founding act.
- One report, fully sourced
- The PDF report cites the source and date of every piece of information: what comes from the GPU, what from the cadastre, what from the relief.
See a real analysis
The public demo shows the zoning analysis of a real parcel: zone, prescriptions and report.
Open the demoDeliverables
- Zoning report PDF
- Zoning and prescriptions overlaid on the orthoimagery
- Project compliance checked against the rules (height, footprint)
Stated technical limits
- GPU documents are those published by local authorities: a non-digitised PLU does not appear.
- The report restates the rules; their legal interpretation remains with the owner and the reviewing authorities.
- Some regulations exceed 400 pages: GeoAlt points to the applicable articles, it does not rewrite them.
Frequently asked questions
Where do the displayed rules come from?
From the Géoportail de l’Urbanisme (GPU), which aggregates the enforceable documents produced by local authorities, and from easements published in the SUP datasets. Every piece of information cites its source and date.
Is the analysis legally binding?
No: GeoAlt restates the official documents and makes them readable. Only the source documents published by the local authority are authoritative.
Are municipalities without a PLU covered?
Municipal maps and documents under revision are flagged as such: the page states the applicable document or its absence — never an invented rule.
Can I check my project’s compliance?
Yes: the project’s height, footprint and siting can be checked against the zone’s rules in the compliance report.
Analyse your parcel’s rules
Enter the cadastral reference: zone, prescriptions, easements and report are gathered on demand.
Open the application