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Sonchamp cadastre

Yvelines (78)

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Parcels
2,670
Cadastral sections
46
Recorded area (contenance)
4,520.9 ha
Commune code (INSEE)
78601

Sections

Planning

Planning document
Local zoning plan (PLU) (78601_PLU_20180202)

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:

Development guidelines (OAP)
677 parcels
Building restricted (environment, risks, public interest)
422 parcels
Classified woodland (EBC)
405 parcels
Remarkable coastal area
298 parcels
Protected built or landscape heritage
224 parcels
Building placement rules
45 parcels
Road, path or public transport to keep or create
24 parcels
Rebuilding or demolition rules
17 parcels
Reserved site
13 parcels
Buildings in a farm or natural zone
8 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: Lead exposure risk area.

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

Sensitive natural area pre-emption zone
1,673 parcels
Urban pre-emption right
1,139 parcels
Sanitation and waste
683 parcels
Archaeological site
239 parcels
Transport noise sector
175 parcels
Other information
34 parcels
Public forest regime
12 parcels
Soil information sector (pollution)
11 parcels
Land divisions subject to declaration
6 parcels
Peri-urban farmland protection
3 parcels

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 or classified site
864 parcels
Listed monument and its surroundings
568 parcels
Protection forest
300 parcels

Addresses

826 addresses on 48 streets, from the Base Adresse Nationale (national address register). Each number links to its parcel when it is known.

See the 826 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
52% of the parcels' area with high exposure, 42% medium
Risk prevention plan
Natural or mining risk plan (PM1): 81 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)