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Conflans-Sainte-Honorine cadastre

Yvelines (78)

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Parcels
11,619
Cadastral sections
29
Recorded area (contenance)
806.9 ha
Commune code (INSEE)
78172

Sections

Planning

Planning document
Intermunicipal zoning plan (PLUi) (200059889_PLUi_20260205)

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)
2,998 parcels
Protected built or landscape heritage
1,639 parcels
Retail diversity to protect or develop
215 parcels
Building placement rules
132 parcels
Classified woodland (EBC)
32 parcels
Reserved site
15 parcels
Social housing quota sector
11 parcels
Other prescription
7 parcels
Road, path or public transport to keep or create
3 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: Local advertising rules and Urban pre-emption right.

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

Joint development zone (ZAC)
23 parcels
Other information
23 parcels
Development tax sector
15 parcels
Transport noise sector
6 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 monument and its surroundings
1,378 parcels
Railways
1,061 parcels
Listed or classified site
176 parcels
Power lines
160 parcels
Towpath
32 parcels
Classified installation or polluted site
19 parcels

Addresses

10,295 addresses on 448 streets, from the Base Adresse Nationale (national address register). Each number links to its parcel when it is known.

See the 10,295 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
9% of the parcels' area with high exposure, 91% medium
Risk prevention plan
Natural or mining risk plan (PM1): 1,097 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)