Parcel 44187 000 AK 189

Parcel of 1,864 m² (recorded area) with 2 buildings (residential, outbuilding), built 2000 or later, in Saint-Père-en-Retz. Planning document zones: UB and A.

Recorded area: 1,864 m²
Planning zone: UB (77%) · A (23%)Straddles 2 planning document zones.

Open in the map

The parcel (in colour) and its neighbours, from the cadastre; computed perimeter: 223 m. North is up; the bar gives the scale.

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)

At a glance

Computed area: 1,865 m²from the cadastral plan
Perimeter: 223 mcomputed from the cadastral plan
Buildings: 2 buildingsResidential, outbuilding
Built: 2000 or later
Height to the eaves: up to 4.7 m
Storeys: up to 2 (ground floor included)
Dwellings: 1
Addresses: None linked
Clay soils: Low exposure (100% of the parcel)
Risk prevention plans: Not recorded

This parcel’s figures, from the cadastre, the national address base (BAN), IGN’s BD TOPO and the risk databases. Missing data is not shown.

What this means for a project

Zone UB: before an extension, a shed or a division, read this zone’s rules (height, footprint, setbacks from the street and the boundaries). Guide: Turn the map finding into a specific question
Zone A: apart from farm buildings, usually only a measured extension and outbuildings of an existing home are allowed, and only where the rules provide for them. Guide: Turn the map finding into a specific question
The parcel is split between 2 zones: each part follows the rules of its own zone. Guide: Read the documents, not just the colour
7 prescriptions, information areas or easements touch the parcel (details below): they apply on top of the zone’s rules. Guide: Read the documents, not just the colour
Seismic zone 3 (moderate): a new house must follow the earthquake-resistant building rules. Guide: Identify the scope of each finding
Radon potential category 3: it appears in the information given to buyers and tenants; ventilating and, during works, sealing between the ground and the building reduce exposure. Guide: Prepare the formal risk statement

Points drawn from this parcel’s data. They tell you which questions to ask; they do not replace a certificat d’urbanisme or the official statement of risks.

Understanding the map information

Planning zoning

UB – Urban zone (U)

Urban zone family. This category does not establish permission to build: check the local code, applicable rules and parcel constraints.

77% of the parcel
Document: 44187_PLU_20220926

A – Agricultural zone (A)

Protected farmland: building is strictly limited.

23% of the parcel
Document: 44187_PLU_20220926

Addresses

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

All addresses in Saint-Père-en-Retz

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”.

National clay exposure (BRGM/Géorisques) and labels in the local planning document are separate sources: dates, methods and purposes may differ. Both values are retained; neither replaces the other. Check the national map and local rules with the authorities. Data versions: national clay layer 2026-07-02; GPU extraction 2026-08-15. Géorisques: soil studies and construction

Building placement rules: Marge de recul – 23% of the parcel

See the document on the Géoportail de l'Urbanisme

Local plan information

Lead exposure risk area: Zone à risque d'exposition au plomb – 100% of the parcel
Sanitation zoning: Zonage d'assainissement des eaux usées – 84% of the parcel
Urban pre-emption right: Périmètre de droit de préemption urbain – 77% of the parcel
Transport noise sector: Bruit - Secteur affecté par le bruit – 14% of the parcel
Sanitation zoning: Schéma de réseau - Assainissement - Eaux pluviales – line on the parcel or its boundary
Sanitation zoning: Schéma de réseau - Eau potable – line on the parcel or its boundary

See the document on the Géoportail de l'Urbanisme

Public-utility easements

Not recorded in the Géoportail de l'Urbanisme

Buildings

Indicative data (IGN BD TOPO): buildings IGN links to the parcel (BAN PLUS) when they cover at least 20 m² of it, with information from the tax files (DGFiP), anonymised. An unknown height or number is not shown. Construction years are grouped into periods, because old buildings often carry an estimated round year (1800, 1900…). A building standing on several parcels is counted on each, with all its dwellings. Recent buildings may be missing: the tax files are updated with a delay.

On the parcel: 2 buildings
1 of them also stands on other parcels; dwellings are counted for the whole building
Use: Residential, outbuilding
Height to the eaves: up to 4.7 m
Storeys: up to 2 (ground floor included)
Dwellings: 1
Built: 2000 or later

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: Not recorded in the Géoportail de l'Urbanisme
Seismic zone: Zone 3 (moderate)
Radon potential: Category 3 (significant)

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

The parcel in its section

By recorded area, larger than 93% of the 248 parcels of section AK whose area is recorded.
Median recorded area in the section: 470 m².
131 of the section’s 248 parcels have a linked building, 51 an address.
Saint-Père-en-Retz has 8,124 parcels; this one holds less than 0.01% of their total recorded area.

Details

Cadastral reference: 44187 000 AK 189 (44187000AK0189)
Commune: Saint-Père-en-Retz (44187)
Prefix: 000
Section: AK
Number: 189
Recorded area (contenance): 1,864 m² Contenance arpentée (measured on site).
Computed area: 1,865 m² Computed from the plan, may differ from the recorded area.

Planning in this commune

Planning document: Local zoning plan (PLU) (44187_PLU_20220926)

Find the applicable document on the official GPU map

Document identified in the data, without assurance that it covers the whole commune or every parcel. Several documents may apply. Check coverage and the current version with the town hall or GPU. 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”.

Planning zones (share of parcel area):

Agricultural zone (A) (78%)
Natural and forest zone (N) (18%)
Urban zone (U) (3%)
Development zone (AUc) (1%)
Closed development zone (AUs) (0%)

Source datasets used on this page: 8. 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.
BAN PLUS (rattachement géométrique adresse → parcelle) 2026-06-15 — Licence Ouverte / Open Licence 2.0
BAN PLUS is IGN’s product linking Base Adresse Nationale addresses to reference geographic objects, including cadastral parcels, using geometric matching.
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.
BD TOPO® – bâtiments (usage, hauteur, niveaux, logements, année de construction) 2026-06-15 — Licence Ouverte / Open Licence 2.0
BD TOPO is IGN’s vector topographic reference dataset. Its building component describes footprints and available attributes such as use, height and selected construction information.