All architects in Gex
6 active architecture establishments in Gex (Ain, 01), according to INSEE's Sirene register (data of 26 October 2026).
- Practices
- 6
- Per 10,000 residents
- 4.4
- Companies
- 5
- Founded since 2025
- 1
Gex (population 13,627) has 6 architecture practices: 4.4 per 10,000 residents, against 2.7 on average in the department (Ain). 5 are companies and 1 are architects working as sole practitioners. The oldest company still active, Architecture 123, was founded in 2007. One was founded in 2025 or later.
Planning rules in Gex: see the local plan (PLU) on the Géoportail de l'urbanisme ↗
6 results
| Firm | Town | Phone | Founded | Type |
|---|---|---|---|---|
| Addict Architecture SARL | Gex 53 Avenue de la Gare, 01170 | 2011 | SARL | |
| Arch-Ange | Gex 54 Ruelle des Issues, 01170 | 2020 | SAS | |
| Architecture 123 | Gex 123 Rue du Commerce, 01170 | 2007 | SAS | |
| Hana Naumowicz | Gex Residence le Patio 15 Place du Jura, 01170 | 2013 | Sole trader | |
| Niepceron Group | Gex 35 Rue Alexandre Reverchon, 01170 | 2016 | SAS | |
| Olivier Leclerc Architectures | Gex 62 Impasse du Ruisseau, 01170 | 2025 | SAS |
Architects near Gex
All architects – Ain (01) →Architects in Gex: common questions
How many architects are there in Gex?
The Sirene register lists 6 active architecture practices in Gex: 5 companies and 1 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 Gex?
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 Gex (height, position, appearance) are set out in the local plan (PLU).
How much does an architect cost in Gex?
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.