All architects in Groslay
5 active architecture establishments in Groslay (Val-d'Oise, 95), according to INSEE's Sirene register (data of 26 October 2026).
- Practices
- 5
- Per 10,000 residents
- 5.9
- Companies
- 2
- Founded since 2025
- 1
Groslay (population 8,453) has 5 architecture practices: 5.9 per 10,000 residents, against 2.4 on average in the department (Val-d'Oise). 2 are companies and 3 are architects working as sole practitioners. One was founded in 2025 or later.
Planning rules in Groslay: see the local plan (PLU) on the Géoportail de l'urbanisme ↗
5 results
| Firm | Town | Phone | Founded | Type |
|---|---|---|---|---|
| Asymptote SAS d'Architecture (Asymptote SAS d'Architecture) (Asa) | Groslay 95410 Groslay 59 Rue du Lac Marchais, 95410 | 2025 | SAS | |
| Gilles Charton | Groslay 28 Rue d'Enghien, 95410 | 1980 | Sole trader | |
| Guy Boisseau (Concept Habitat) | Groslay 28 Rue Pierre Corre, 95410 | 1988 | Sole trader | |
| Marie Leger Architecte (Archi Bien) | Groslay 2 Rue Jules Vincent, 95410 | 2016 | SAS | |
| Rodolphe Augustin Azard | Groslay 5 Rue Bequet, 95410 | 2015 | Sole trader |
Architects near Groslay
All architects – Val-d'Oise (95) →Architects in Groslay: common questions
How many architects are there in Groslay?
The Sirene register lists 5 active architecture practices in Groslay: 2 companies and 3 architects working as sole practitioners. All of them are listed on this page, with their address and, where published, their phone number.
Is an architect compulsory to build in Groslay?
As everywhere in France, an individual building for themselves must use an architect once the floor area exceeds 150 m², counting the total after works for an extension. A company, including an SCI, always needs one for a building permit. The local rules for Groslay (height, position, appearance) are set out in the local plan (PLU).
How much does an architect cost in Groslay?
Fees are free and set in the contract. For a full mission, from design to site supervision, pricing guides usually quote 8–12% of the cost of the works excluding VAT for a new house and 10–15% for a renovation or extension. A mission limited to the building permit application is usually a fixed fee of about €1,500–4,000 excluding VAT.
Where can I get free advice before choosing an architect?
In most departments, the CAUE (council for architecture, planning and the environment) sees individuals for free, by appointment, to help them prepare their project. The map of CAUEs is on fncaue.com.