26 bis Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
4 buildings with 43 recorded homes, built 2000 or later, on a parcel of 4,608 m² (recorded area). Planning document zoning: urban zone (UA).
- Recorded area
- 4,608 m²
- Planning zone
- UAUrban zone (U)
Address from France’s national address register (BAN), associated with this parcel for information only. Addresses and how they are linked
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
- 4,653 m²from the cadastral plan
- Perimeter
- 340 mcomputed from the cadastral plan
- Buildings
- 4 buildingsResidential
- Built
- 2000 or later
- Height to the eaves
- up to 10.2 m
- Dwellings
- 43
- Addresses
- 2 linked addresses
- Clay soils
- High 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 UA: 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
- 16 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
- Clay soils: High exposure (100% of the parcel). General rule in medium or high exposure areas: the seller of unbuilt buildable land supplies a preliminary geotechnical study where planning rules permit individual houses. Exposure alone does not establish that this sale is covered. Construction projects are subject to separate rules to check with the professional. Géorisques: soil studies and construction
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
- French planning: who decides what
- The public data behind the map
- Reading and finding a cadastral reference
- Cadastre and boundary surveys: where does the land end?
- Reading a PLU: a zone label does not define a project
- Recorded and calculated parcel area: why two figures?
- Addresses and parcels: why they do not always match
- Parcel owners: what the map does not show and where to ask
- Dividing a plot: preparing a land division
- Property risks: from a map finding to a proper check
Planning zoning
UA – Urban zone (U)
Urban zone family. This category does not establish permission to build: check the local code, applicable rules and parcel constraints.
100% of the parcel
Document: 78551_PLU_20260506
Addresses
Source: Base Adresse Nationale (national address register). “Linked by its position”: the address point lies inside the parcel. “Linked by its building (RNB)”: the building that carries the address in the national building register (Référentiel National des Bâtiments) stands on the parcel. “Linked by IGN (BAN PLUS)”: IGN matches the address to this parcel, the nearest one on the same side of the street, and the address point lies inside it. In these cases the Base Adresse Nationale declares no link.
- 26 bis Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye (linked by its building (RNB))
- 28 Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye (linked by its building (RNB))
All addresses in Saint-Germain-en-Laye
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
- Protected building heritage
- Bâti protégé – 2% of the parcel
See the document on the Géoportail de l'Urbanisme
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”.
- Urban pre-emption right
- DPU simple – 100% of the parcel
- Transport noise sector
- Categorie 3 - Secteur affecté par le bruit des infrastructures de transports terrestres - arrêté préfectoral du 13 fevrier – 100% of the parcel
- Archaeological site
- Site archéologique – 100% of the parcel
- Sanitation zoning
- Zone d'assainissement collectif – 100% of the parcel
- Local advertising rules
- Zone de publicité 1a – 100% of the parcel
- Other information
- Risque moyen - Secteur concerné par un risque de mouvements de terrain liés au retrait gonflement des sols argileux – 100% of the parcel
- Commercial pre-emption right
- Droit de préemption commercial – 3% of the parcel
See the document on the Géoportail de l'Urbanisme
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”.
- Listed monument and its surroundings
- Chapelle – 100% of the parcel
- Listed monument and its surroundings
- Hôtel de Créqui (ancien) – 100% of the parcel
- Listed monument and its surroundings
- Immeubles – 100% of the parcel
- Listed monument and its surroundings
- Maison natale de Claude Debussy – 100% of the parcel
- Listed monument and its surroundings
- Hôtel de Noailles (ancien) – 35% of the parcel
- Listed monument and its surroundings
- Eglise Saint-Louis – 34% of the parcel
- Listed monument and its surroundings
- Prieuré, maison de Maurice Denis – 25% of the parcel
- Listed monument and its surroundings
- Hôtel de Villeroy (ancien) – 2% of the parcel
See the document on 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
- 4 buildings
- Use
- Residential
- Height to the eaves
- up to 10.2 m
- Storeys
- up to 4 (ground floor included)
- Dwellings
- 43
- 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
- High exposure (100% of the parcel)
- Risk prevention plan
- Not recorded in the Géoportail de l'Urbanisme
- Seismic zone
- Zone 1 (very low)
- Radon potential
- Category 1 (low)
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
Produce the risk statement (ERRIAL) on GéorisquesRisks near an address (Géorisques)
The parcel in its section
- By recorded area, larger than 100% of the 869 parcels of section AI whose area is recorded.
- Median recorded area in the section: 177 m².
- 757 of the section’s 869 parcels have a linked building, 710 an address.
- Saint-Germain-en-Laye has 9,563 parcels; this one holds less than 0.01% of their total recorded area.
Details
- Cadastral reference
- 78551 000 AI 45 (78551000AI0045)
- Commune
- Saint-Germain-en-Laye (78551)
- Prefix
- 000
- Section
- AI
- Number
- 45
- Recorded area (contenance)
- 4,608 m²
- Computed area
- 4,653 m² Computed from the plan, may differ from the recorded area.
Planning in this commune
- Planning document
- Local zoning plan (PLU) (78551_PLU_20260506)
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):
- Natural and forest zone (N) (84%)
- Urban zone (U) (18%)
- Agricultural zone (A) (3%)
- Development zone (AUc) (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 2.0Cadastre 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 2.0The 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 2.0The 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 2.0BAN 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 2.0The 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 1.0This 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 1.0Radon 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 2.0BD TOPO is IGN’s vector topographic reference dataset. Its building component describes footprints and available attributes such as use, height and selected construction information.
Neighbouring parcels
- 78551 000 AI 34 – 29 Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 35 – 31 bis Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 36 – 33 Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 37 – 37 Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 38 – 39 Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 41 – 32 Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 42 – 9 Rue Armagis, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 43 – 7 Rue Armagis, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 44 – 5 Rue Armagis, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 46 – 30 ter Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 47 – 30 bis Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 48 – 30 Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 49 – 26 Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 50 – 24 Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 84 – 73 bis Rue de Pologne, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
- 78551 000 AI 86 – 3 bis Rue Armagis, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye
Previous parcel: 78551 000 AI 44 – 5 Rue Armagis, Saint-Germain-en-Laye, 78100 Saint-Germain-en-LayeNext parcel: 78551 000 AI 46 – 30 ter Rue de la Grande Fontaine, Saint-Germain-en-Laye, 78100 Saint-Germain-en-Laye