All architects in Croissy-sur-Seine
11 active architecture establishments in Croissy-sur-Seine (Yvelines, 78), according to INSEE's Sirene register (data of 26 October 2026).
- Practices
- 11
- Per 10,000 residents
- 10.0
- Companies
- 4
- Founded since 2025
- 1
Croissy-sur-Seine (population 11,013) has 11 architecture practices: 10.0 per 10,000 residents, against 5.2 on average in the department (Yvelines). 4 are companies and 7 are architects working as sole practitioners. The oldest company still active, Archintec, was founded in 1986. One was founded in 2025 or later.
Planning rules in Croissy-sur-Seine: see the local plan (PLU) on the Géoportail de l'urbanisme ↗
11 results
| Firm | Town | Phone | Founded | Type |
|---|---|---|---|---|
| Aiu Architecture | Croissy-sur-Seine Bat 5 23 Avenue du General de Gaulle, 78290 | 2026 | SAS | |
| Alain Memponte | Croissy-sur-Seine 8 Impasse des Erables, 78290 | 1981 | Sole trader | |
| Archintec | Croissy-sur-Seine 17 Boulevard Fernand Hostachy, 78290 | 1986 | SARL | |
| Bik Architecture Ile de France Pays de la Loire | Croissy-sur-Seine Parc Claude Monet 6 Rue Maurice Leblanc, 78290 | 1986 | SAS | |
| Cabinet Leroy | Croissy-sur-Seine 4 Avenue Carnot, 78290 | 2006 | SAS | |
| Elliot Pena (Elliot Pena Architecture) | Croissy-sur-Seine 2 Allee Champ du Berger, 78290 | 2022 | Sole trader | |
| Francois Legendre | Croissy-sur-Seine 27 Avenue de Wailly, 78290 | 2010 | Sole trader | |
| Jean-Christophe Poirier | Croissy-sur-Seine 27 Avenue de Wailly, 78290 | 2011 | Sole trader | |
| Kevin Pinto | Croissy-sur-Seine 26 Rue des Ponts, 78290 | 2014 | Sole trader | |
| Thomas Magnytrading as Cabinet Besson et Associes | Croissy-sur-Seine 27 Avenue de Wailly, 78290 | 2019 | Sole trader | |
| Vincent Heguy | Croissy-sur-Seine 27 Avenue de Wailly, 78290 | 1980 | Sole trader |
Architects near Croissy-sur-Seine
All architects – Yvelines (78) →Architects in Croissy-sur-Seine: common questions
How many architects are there in Croissy-sur-Seine?
The Sirene register lists 11 active architecture practices in Croissy-sur-Seine: 4 companies and 7 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 Croissy-sur-Seine?
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 Croissy-sur-Seine (height, position, appearance) are set out in the local plan (PLU).
How much does an architect cost in Croissy-sur-Seine?
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.