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Orsay cadastre

Essonne (91)

Parcels
5,779
Cadastral sections
24
Recorded area (contenance)
638.7 ha
Commune code (INSEE)
91471

Sections

Planning

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

PLU zones (share of parcel area):

Zoning plan statistics: prescriptions, information areas and easements

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”.

Parcels of the commune concerned, according to the Géoportail de l'Urbanisme:

Other prescription
1,895 parcels
Development guidelines (OAP)
1,067 parcels
Building restricted (environment, risks, public interest)
601 parcels
Protected built or landscape heritage
587 parcels
Classified woodland (EBC)
369 parcels
Retail diversity to protect or develop
207 parcels
Reserved site
147 parcels
Parking requirements of the mobility plan
11 parcels
Building placement rules
1 parcel

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”.

Parcels of the commune concerned, according to the Géoportail de l'Urbanisme:

Transport noise sector
35 parcels
Development tax sector
27 parcels
Urban pre-emption right
21 parcels
National interest operation (OIN)
1 parcel
Other information
1 parcel

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”.

Parcels of the commune concerned, according to the Géoportail de l'Urbanisme:

Listed monument and its surroundings
938 parcels
Listed or classified site
660 parcels
Saclay plateau protection
82 parcels
Power lines
4 parcels

Addresses

4,560 addresses on 224 streets, from the Base Adresse Nationale (national address register). Each number links to its parcel when it is known.

See the 4,560 addresses

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.

Seismic zone
Zone 1 (very low)
Radon potential
Category 1 (low)
Clay shrink-swell
76% of the parcels' area with high exposure, 24% medium
Risk prevention plan
Natural or mining risk plan (PM1): 267 parcels within a perimeter recorded in the Géoportail de l'Urbanisme

Property prices

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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)