All architects in Firminy
7 active architecture establishments in Firminy (Loire, 42), according to INSEE's Sirene register (data of 26 October 2026).
- Practices
- 7
- Per 10,000 residents
- 4.1
- Companies
- 4
- Founded since 2025
- 0
Firminy (population 17,060) has 7 architecture practices: 4.1 per 10,000 residents, against 4.6 on average in the department (Loire). 4 are companies and 3 are architects working as sole practitioners. The oldest company still active, Ar-Ceo, was founded in 2004.
Planning rules in Firminy: see the local plan (PLU) on the Géoportail de l'urbanisme ↗
7 results
| Firm | Town | Phone | Founded | Type |
|---|---|---|---|---|
| Ar-Ceo | Firminy 18 Rue du Soleil, 42700 | 2004 | SARL | |
| Auda Architecte | Firminy 8 Rue du Soleil, 42700 | 2011 | SARL | |
| Isabelle Aulagnier-Fernandez (Aulagnier) | Firminy 19 Rue Verdie, 42700 | 2005 | Sole trader | |
| Isabelle Aulagnier-Fernandez (Aulagnier) | Firminy 19 Rue Verdie, 42700 | 2005 | Sole trader | |
| Jambresic Architecte | Firminy 2 Eme Rue Appartement 102 le Corbusier, 42700 | 2020 | SARL | |
| Pierre Chapal | Firminy Rue 6 6 le Corbusier, 42700 | 1996 | Sole trader | |
| S. D. Archi | Firminy 17 Rue Dorian, 42700 | 2004 | SARL |
Architects near Firminy
All architects – Loire (42) →Architects in Firminy: common questions
How many architects are there in Firminy?
The Sirene register lists 7 active architecture practices in Firminy: 4 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 Firminy?
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 Firminy (height, position, appearance) are set out in the local plan (PLU).
How much does an architect cost in Firminy?
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.