All architects in Mont-Saint-Aignan

36 active architecture establishments in Mont-Saint-Aignan (Seine-Maritime, 76), according to INSEE's Sirene register (data of 26 October 2026).

Practices
36
Per 10,000 residents
17.9
Companies
17
Founded since 2025
2

Mont-Saint-Aignan (population 20,165) has 36 architecture practices: 17.9 per 10,000 residents, against 3.8 on average in the department (Seine-Maritime). 17 are companies and 19 are architects working as sole practitioners. One employs 10 people or more. The oldest company still active, Groupe d'Etude de Realisation d'Ingenierie d'Architecture et d'Urbanisme, was founded in 1988. 2 were founded in 2025 or later.

Planning rules in Mont-Saint-Aignan: see the local plan (PLU) on the Géoportail de l'urbanisme ↗

36 results

FirmTownPhoneFoundedType
Alain RobinneMont-Saint-Aignan 26 Rue Raymond Aron, 761301979Sole trader
Amaury ToulemondeMont-Saint-Aignan 30 Chemin de la Planquette, 761302014Sole trader
Ash ArchitectesMont-Saint-Aignan 90 B Chemin des Cottes, 761302010SELARL
Atelier d Architecture 2S (AA2S)Mont-Saint-Aignan 5 Rue des Courlis, 761302010SARL
Atelier des Verre et AcierMont-Saint-Aignan 15 Parc de la Risle, 761302004SARL
Bloom DesignMont-Saint-Aignan 3 Rue de la Corderie, 761302022SAS
Celia Mihoubi (Idjerouidene)Mont-Saint-Aignan 12 Rue de l'Alma, 761302025Sole trader
Collectif ArcadeMont-Saint-Aignan 31 Rue Henault, 761302023SARL
Etienne DupreMont-Saint-Aignan 4 Rue Edmond Megard, 76130Sole trader
EURL d'Architecture Atelier XVtrading as Architecte D.P.L.G., Atelier XVMont-Saint-Aignan 30 Chemin de la Planquette, 761301999SELARL
Fabri ArchitectesMont-Saint-Aignan 30 Chemin de la Planquette, 761302017SARL
Gilles BachelayMont-Saint-Aignan 10 Parc du Cailly, 761301987Sole trader
Gilles Duchesne (Gilles Duchesne Architecte)Mont-Saint-Aignan 9 Rue Michel, 761301981Sole trader
Groupe d'Etude de Realisation d'Ingenierie d'Architecture et d'UrbanismeMont-Saint-Aignan 20 Av Gallieni, 761301988SARL
Groupe JamesMont-Saint-Aignan 3 Rue de la Corderie, 761302022SAS
Helene Samy (Ropers)Mont-Saint-Aignan 44 Avenue du Mont aux Malades, 761302007Sole trader
HellysMont-Saint-Aignan 44 Avenue du Mont aux Malades, 761302025SAS
Jean Baptiste RicciMont-Saint-Aignan 8 Rue Fremont, 761302010Sole trader
Jean-Michel LibertyMont-Saint-Aignan 3 Rue Marcel Dupre, 761302001Sole trader
Jessica Jeanmaire (Bornet)Mont-Saint-Aignan 2 T Rue Mazurier, 761302021Sole trader
Mancif GuennounMont-Saint-Aignan 32 Rue Jacques Boutrolle, 761301988Sole trader
MC4Mont-Saint-Aignan 4 Rue Louise de Bettignies, 761302022SARL
Nathalie Adrian (Halbout)Mont-Saint-Aignan 4 Rue Lefort Gonssolin, 761301990Sole trader
Nicolas ClaudetMont-Saint-Aignan SARL Ateliers Verres et Aciers 15 Parc de la Risle, 761302004Sole trader
Patrick VatreMont-Saint-Aignan 85 Chemin de Cleres, 761301988Sole trader
R24 ArchitectesMont-Saint-Aignan 44 Avenue du Mont aux Malades, 761302009SARL
SAS Philippe de LanouvelleMont-Saint-Aignan 4 Place de l'Eglise, 761302021SAS
SAS R&L Architectes AssociesMont-Saint-Aignan 48 Avenue Gallieni, 761302022SAS
Stef Archicite Patrick Vatre ArchitecteMont-Saint-Aignan 85 Chemin de Cleres, 761301991
Stephane RousseauMont-Saint-Aignan 136 Chemin des Cottes, 761301984Sole trader
Sylvain Samy-Ropers (Samy)Mont-Saint-Aignan 44 Avenue du Mont aux Malades, 761302015Sole trader
UlyssesMont-Saint-Aignan 3 Rue de la Corderie, 761302009SARL
Valerie DemouilliezMont-Saint-Aignan Robinne Ropers Gourdin 26 Rue Raymond Aron, 761302002Sole trader
Valerie DubroeucqMont-Saint-Aignan 8 Rue de Crimee, 761302022Sole trader
Virginie Leca Architecte (Virginie Leca Architecte)Mont-Saint-Aignan 21 Rue Edouard Fortier, 761302014SARL
Yohann ChubertMont-Saint-Aignan 27 Rue Georges Clemenceau, 761302010Sole trader

Architects near Mont-Saint-Aignan

All architects – Seine-Maritime (76) →

Architects in Mont-Saint-Aignan: common questions

How many architects are there in Mont-Saint-Aignan?

The Sirene register lists 36 active architecture practices in Mont-Saint-Aignan: 17 companies and 19 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 Mont-Saint-Aignan?

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 Mont-Saint-Aignan (height, position, appearance) are set out in the local plan (PLU).

How much does an architect cost in Mont-Saint-Aignan?

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.