All architects in Treillières
9 active architecture establishments in Treillières (Loire-Atlantique, 44), according to INSEE's Sirene register (data of 26 October 2026).
- Practices
- 9
- Per 10,000 residents
- 8.5
- Companies
- 7
- Founded since 2025
- 0
Treillières (population 10,600) has 9 architecture practices: 8.5 per 10,000 residents, against 7.2 on average in the department (Loire-Atlantique). 7 are companies and 2 are architects working as sole practitioners. The oldest company still active, Agce Youcef Tazir Architecte DPLG SARL A, was founded in 2002.
Planning rules in Treillières: see the local plan (PLU) on the Géoportail de l'urbanisme ↗
9 results
| Firm | Town | Phone | Founded | Type |
|---|---|---|---|---|
| Agce Youcef Tazir Architecte DPLG SARL A | Treillieres La Noe Violain, 44119 | 2002 | SARL | |
| Agpu Paysage & Urbanisme (Agpu) | Treillieres Zac de Ragon 11 Rue des Freres Lumiere, 44119 | 2017 | SARL | |
| Creatis Habitat | Treillieres 23 T Rue de Rennes, 44119 | 2017 | SAS | |
| Loic Brandet | Treillieres 7 Chemin du Soupais, 44119 | 2001 | Sole trader | |
| M&Co SARL d'Architecture (M&Co) | Treillieres 43 Rue de Garambeau, 44119 | 2023 | SARL | |
| Maison Plus | Treillieres 9 Rue des Mimosas, 44119 | 2015 | SARL | |
| Multiples | Treillieres 5 Rue de la Chairois, 44119 | 2019 | SAS | |
| Tektolab Architectes | Treillieres 9 Venelle du Serpentin, 44119 | 2014 | SARL | |
| Youcef Tazir | Treillieres La Noe Violain, 44119 | 1990 | Sole trader |
Architects near Treillières
All architects – Loire-Atlantique (44) →Architects in Treillières: common questions
How many architects are there in Treillières?
The Sirene register lists 9 active architecture practices in Treillières: 7 companies and 2 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 Treillières?
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 Treillières (height, position, appearance) are set out in the local plan (PLU).
How much does an architect cost in Treillières?
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.