Parcel 78418 000 AI 1471

Cadastral parcel of 22 m² (recorded area), in Montesson. Local plan (PLU) zoning: development zone (AU-m).

Recorded area: 22 m²
PLU zone: AU-mDevelopment zone (AUc)

The parcel (coloured) and its neighbours, from the cadastre.

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)

Understanding the map information

PLU zoning

AU-m – Development zone (AUc)

Area set aside for development: building is allowed as services arrive or as part of a wider scheme, under the PLU rules.

100% of the parcel
Document: 78418_PLU_20251120

Addresses

No address from the Base Adresse Nationale is linked to this parcel.

All addresses in Montesson

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”.

Development guidelines (OAP): Orientation d'aménagement et de programmation du Fond Sainte Honorine – 100% of the parcel

See the document on the Géoportail de l'Urbanisme

Local plan information

Deferred development zone (ZAD): ZAD "Fond Sainte-Honorine II" créée par AP n° 2016148-0012 du 27 mai 2016, renouvelée par AP du 23 mai 2022 – 100% of the parcel
Transport noise sector: PVITT Catégorie 1 (300 m) - autoroute A14 – 100% of the parcel
Other information: Exposition au retrait-gonflement des sols argileux : aléa faible – 100% of the parcel

See the document on the Géoportail de l'Urbanisme

Public-utility easements

Not recorded in the Géoportail de l'Urbanisme

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: Low exposure (100% of the parcel)
Risk prevention plan: Natural or mining risk plan (PM1) – Délimitation du périmètre des zones de risques liés à la présence d'anciennes carrières – 100% of the parcel
Seismic zone: Zone 1 (very low)
Radon potential: Category 1 (low)

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

Details

Cadastral reference: 78418 000 AI 1471 (78418000AI1471)
Commune: Montesson (78418)
Prefix: 000
Section: AI
Number: 1471
Recorded area (contenance): 22 m² Contenance arpentée (measured on site).
Computed area: 23 m² Computed from the plan, may differ from the recorded area.

Planning in this commune

Planning document: Local zoning plan (PLU) (78418_PLU_20251120)

PLU zones (share of parcel area):

Urban zone (U) (38%)
Agricultural zone (A) (35%)
Natural and forest zone (N) (20%)
Development zone (AUc) (5%)
Closed development zone (AUs) (3%)

Source datasets used on this page: 6. Their dates and reuse terms can differ.

Sources and versions used on this page

Plan cadastral informatisé (Etalab) 2026-06-01 — Licence Ouverte / Open Licence 2.0
Cadastre Etalab redistributes the French digital cadastral plan in simplified geographic formats, including parcels, sections and buildings. Mapped boundaries do not replace a boundary survey.
Géoportail de l’Urbanisme — extraction nationale 2026-08-15 — Licence Ouverte / Open Licence 2.0
The national Urban Planning Geoportal extraction brings together layers published by the GPU from documents supplied by municipalities, intermunicipal authorities and state services. The competent authorities remain responsible for the documents and their regulatory meaning.
Base Adresse Nationale (listes d’adresses et géocodage Géoplateforme) 2026-10-07 — Licence Ouverte / Open Licence 2.0
The Base Adresse Nationale brings together French addresses, including those published by municipalities. Address coordinates alone do not establish an administrative link to a cadastral parcel.
Exposition au retrait-gonflement des argiles 2026-07-02 — Licence Ouverte / Open Licence 2.0
The clay shrink-swell exposure map describes geological exposure at the map’s scale. It does not replace a site-specific geotechnical investigation.
Zonage sismique de la France (décret n° 2010-1255), liste version janvier 2015 2018-07-30 — Licence Ouverte / Open Licence 1.0
This vector layer published by wpd is based on the BRGM / planseisme.fr list of municipalities and seismic zones, January 2015 version. Municipal zoning does not measure the structural risk of an individual building.
Potentiel radon des communes (arrêté du 27 juin 2018) 2019-05-06 — Licence Ouverte / Open Licence 1.0
Radon potential zoning classifies municipalities according to their geological potential to emit radon. It does not measure the indoor radon concentration of an individual building.