All architects in Franconville
7 active architecture establishments in Franconville (Val-d'Oise, 95), according to INSEE's Sirene register (data of 26 October 2026).
- Practices
- 7
- Per 10,000 residents
- 1.9
- Companies
- 3
- Founded since 2025
- 2
Franconville (population 37,754) has 7 architecture practices: 1.9 per 10,000 residents, against 2.4 on average in the department (Val-d'Oise). 3 are companies and 4 are architects working as sole practitioners. The oldest company still active, Lost en France, was founded in 2008. 2 were founded in 2025 or later.
Planning rules in Franconville: see the local plan (PLU) on the Géoportail de l'urbanisme ↗
7 results
| Firm | Town | Phone | Founded | Type |
|---|---|---|---|---|
| Adkey Build&Design (Adb) | Franconville 9 Rue Philippe Seguin, 95130 | 2025 | SAS | |
| Didier Laleu | Franconville 111 B Boulevard Maurice Berteaux, 95130 | 1992 | Sole trader | |
| Jean-Francois Calpitelli | Franconville 22 Rue des Pommiers Saulniers, 95130 | 2014 | Sole trader | |
| Lost en France | Franconville 10 Chemin Vert des Gratte Boeufs, 95130 | 2008 | SARL | |
| Mansard en France (Mansard en France S.A.S.) | Franconville 10 Chemin Vert des Gratte Boeufs, 95130 | 2026 | SAS | |
| Mohand Boussaid (Mab Architecture) | Franconville 9 Rue Aline, 95130 | 2021 | Sole trader | |
| Patrick Pognant | Franconville 12 Avenue Gounod, 95130 | 1995 | Sole trader |
Architects near Franconville
All architects – Val-d'Oise (95) →Architects in Franconville: common questions
How many architects are there in Franconville?
The Sirene register lists 7 active architecture practices in Franconville: 3 companies and 4 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 Franconville?
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 Franconville (height, position, appearance) are set out in the local plan (PLU).
How much does an architect cost in Franconville?
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.