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71 Rue de Châteaufort, 91400 Orsay

Building with 6 homes, built 1975 – 1999, on a parcel of 2,197 m² (recorded area). Planning document zoning: urban zone (UHc).

Recorded area
2,197 m²
Planning zone
UHcUrban zone (U)
Open in the map

Address from France’s national address register (BAN), associated with this parcel for information only. Addresses and how they are linked

91471 000 AH 191471 000 AH 791471 000 AH 891471 000 AH 1191471 000 AH 1291471 000 AH 1391471 000 AH 1491471 000 AH 2491471 000 AH 4291471 000 AH 4791471 000 AH 4891471 000 AH 4991471 000 AH 5191471 000 AH 44591471 000 AH 47091471 000 AH 53691471 000 AH 53791471 000 AH 53891471 000 AH 53991471 000 AH 54191471 000 AH 56091471 000 AH 60091471 000 AH 61691471 000 AH 61791471 000 AH 65691471 000 AH 65791471 000 AH 65891471 000 AH 65991471 000 AH 66091471 000 AH 68591471 000 AH 70091471 000 AH 70291471 000 AH 70591471 000 AH 70691471 000 AH 70791471 000 AH 71591471 000 AH 71691471 000 AH 71791471 000 AH 72091471 000 AH 72491471 000 AH 72591471 000 AH 73491471 000 AH 73591471 000 AH 82591471 000 AH 82791471 000 AH 84291471 000 AH 85091471 000 AH 91391471 000 AH 91491471 000 AH 915
The parcel (in colour) and its neighbours, from the cadastre; computed perimeter: 215 m. North is up; the bar gives the scale.
The cadastre is a tax record: it does not prove ownership. Why?

The cadastre is a tax record: it does not prove ownership and its boundaries have no legal force (only a surveyor's boundary marking does). Its plan is approximate: especially where it is old, it can be offset by a few metres from the buildings and the aerial imagery. The owner's name is not shown. Boundary marking (Service Public, in French)

At a glance

Computed area
2,204 m²from the cadastral plan
Perimeter
215 mcomputed from the cadastral plan
Buildings
1 buildingResidential
Built
1975 – 1999
Height to the eaves
9.6 m
Storeys
3 (ground floor included)
Dwellings
6
Addresses
1 linked address
Clay soils
High exposure (32% of the parcel), medium (68%)
Risk prevention plans
Not recorded

This parcel’s figures, from the cadastre, the national address base (BAN), IGN’s BD TOPO and the risk databases. Missing data is not shown.

What this means for a project

Points drawn from this parcel’s data. They tell you which questions to ask; they do not replace a certificat d’urbanisme or the official statement of risks.

Understanding the map information

Planning zoning

UHc – Urban zone (U)

Urban zone family. This category does not establish permission to build: check the local code, applicable rules and parcel constraints.

100% of the parcel
Document: 91471_PLU_20260408

Addresses

Source: Base Adresse Nationale (national address register). “Linked by its position”: the address point lies inside the parcel. “Linked by its building (RNB)”: the building that carries the address in the national building register (Référentiel National des Bâtiments) stands on the parcel. “Linked by IGN (BAN PLUS)”: IGN matches the address to this parcel, the nearest one on the same side of the street, and the address point lies inside it. In these cases the Base Adresse Nationale declares no link.

All addresses in Orsay

Local plan prescriptions

For guidance only, from the Géoportail de l'Urbanisme extraction of 15 August 2026; the linked document may have been replaced since. Only the planning document's regulations and annexes are binding. A missing item means “not recorded”, not “no constraint”.

National clay exposure (BRGM/Géorisques) and labels in the local planning document are separate sources: dates, methods and purposes may differ. Both values are retained; neither replaces the other. Check the national map and local rules with the authorities. Data versions: national clay layer 2026-07-02; GPU extraction 2026-08-15. Géorisques: soil studies and construction

Other prescription
Autre – 100% of the parcel
Building restricted (environment, risks, public interest)
Limitations de la constructibilite pour des raisons environnementales, de risques, d interet general – 33% of the parcel

See the document on the Géoportail de l'Urbanisme

Local plan information

For guidance only, from the Géoportail de l'Urbanisme extraction of 15 August 2026; the linked document may have been replaced since. Only the planning document's regulations and annexes are binding. A missing item means “not recorded”, not “no constraint”.

Not recorded in the Géoportail de l'Urbanisme

Public-utility easements

For guidance only, from the Géoportail de l'Urbanisme extraction of 15 August 2026; the linked document may have been replaced since. Only the planning document's regulations and annexes are binding. A missing item means “not recorded”, not “no constraint”.

Not recorded in the Géoportail de l'Urbanisme

Buildings

Indicative data (IGN BD TOPO): buildings IGN links to the parcel (BAN PLUS) when they cover at least 20 m² of it, with information from the tax files (DGFiP), anonymised. An unknown height or number is not shown. Construction years are grouped into periods, because old buildings often carry an estimated round year (1800, 1900…). A building standing on several parcels is counted on each, with all its dwellings. Recent buildings may be missing: the tax files are updated with a delay.

On the parcel
1 building
Use
Residential
Height to the eaves
9.6 m
Storeys
3 (ground floor included)
Dwellings
6
Built
1975 – 1999

Risks

This information is for guidance only and has no regulatory force: it does not replace the risk statement (état des risques, ERRIAL) to be attached to a sale or a rental, which anyone can produce free of charge on Géorisques.

Some clay soils swell when wet and shrink as they dry, which can crack buildings. The higher the exposure, the more building precautions are needed. A risk prevention plan (PPR) maps the areas exposed to a hazard (flooding, ground movement, an industrial site…) and sets building rules there. The Géoportail de l'Urbanisme does not list every plan yet.

Clay shrink-swell
High exposure (32% of the parcel), medium (68%)
Risk prevention plan
Not recorded in the Géoportail de l'Urbanisme
Seismic zone
Zone 1 (very low)
Radon potential
Category 1 (low)

National clay exposure (BRGM/Géorisques) and labels in the local planning document are separate sources: dates, methods and purposes may differ. Both values are retained; neither replaces the other. Check the national map and local rules with the authorities. Data versions: national clay layer 2026-07-02; GPU extraction 2026-08-15. Géorisques: soil studies and construction

Produce the risk statement (ERRIAL) on GéorisquesRisks near an address (Géorisques)

The parcel in its section

Details

Cadastral reference
91471 000 AH 660 (91471000AH0660)
Commune
Orsay (91471)
Prefix
000
Section
AH
Number
660
Recorded area (contenance)
2,197 m²
Computed area
2,204 m² Computed from the plan, may differ from the recorded area.

Planning in this commune

Planning document
Local zoning plan (PLU) (91471_PLU_20260408)

Find the applicable document on the official GPU map

Document identified in the data, without assurance that it covers the whole commune or every parcel. Several documents may apply. Check coverage and the current version with the town hall or GPU. For guidance only, from the Géoportail de l'Urbanisme extraction of 15 August 2026; the linked document may have been replaced since. Only the planning document's regulations and annexes are binding. A missing item means “not recorded”, not “no constraint”.

Planning zones (share of parcel area):

Source datasets used on this page: 8. Their dates and reuse terms can differ.

Sources and versions used on this page

Neighbouring parcels

Previous parcel: 91471 000 AH 659Next parcel: 91471 000 AH 670