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Guyancourt cadastre

Yvelines (78)

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Parcels
4,564
Cadastral sections
37
Recorded area (contenance)
1,270.8 ha
Commune code (INSEE)
78297

Sections

Planning

Planning document
Local zoning plan (PLU) (20005878220260219)

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:

Social housing quota sector
3,871 parcels
Development guidelines (OAP)
3,216 parcels
Protected built or landscape heritage
455 parcels
Classified woodland (EBC)
123 parcels
Ecological corridor (green and blue network)
79 parcels
Reserved site
45 parcels
Retail diversity to protect or develop
37 parcels
Other prescription
34 parcels
Building placement rules
28 parcels
Building restricted (environment, risks, public interest)
2 parcels
Protected garden or open land in a built-up area
2 parcels

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”.

Cover more than 90% of the parcels: Other information, Archaeological site and Lead exposure risk area.

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

Joint development zone (ZAC)
2,568 parcels
Development tax sector
2,067 parcels
Transport noise sector
1,963 parcels
National interest operation (OIN)
550 parcels
Planning decision deferral area
379 parcels
Commercial pre-emption right
230 parcels
Areas and habitats to preserve (wetlands…)
132 parcels
Airport noise exposure plan
6 parcels
Partnership urban project (PUP)
3 parcels
Urban pre-emption right
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
1,817 parcels
Listed or classified site
770 parcels
Saclay plateau protection
82 parcels
Power lines
24 parcels
Railways
23 parcels

Addresses

4,085 addresses on 296 streets, from the Base Adresse Nationale (national address register). Each number links to its parcel when it is known.

See the 4,085 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
26% of the parcels' area with high exposure, 72% medium
Risk prevention plan
Natural or mining risk plan (PM1): 226 parcels within a perimeter recorded in the Géoportail de l'Urbanisme

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

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)