All architects in Lagny-sur-Marne
18 active architecture establishments in Lagny-sur-Marne (Seine-et-Marne, 77), according to INSEE's Sirene register (data of 26 October 2026).
- Practices
- 18
- Per 10,000 residents
- 8.4
- Companies
- 11
- Founded since 2025
- 0
Lagny-sur-Marne (population 21,461) has 18 architecture practices: 8.4 per 10,000 residents, against 2.9 on average in the department (Seine-et-Marne). 11 are companies and 7 are architects working as sole practitioners. One employs 10 people or more. The oldest company still active, Ateliers Bauve Architectes, was founded in 1990.
Planning rules in Lagny-sur-Marne: see the local plan (PLU) on the Géoportail de l'urbanisme ↗
18 results
| Firm | Town | Phone | Founded | Type |
|---|---|---|---|---|
| 34 Architectes | Lagny-sur-Marne 34 Chemin de Gouvernes, 77400 | 2015 | SARL | |
| 3A2U (3A2U) (3A2U) | Lagny-sur-Marne 11 Rue du Docteur Naudier, 77400 | 2013 | SARL | |
| Agence Laurent Fournet Architecte DPLG | Lagny-sur-Marne 26 Rue du Pont Hardy, 77400 | 2011 | SELARL | |
| Arw Architecte | Lagny-sur-Marne 28 Rue des Tanneurs, 77400 | 2013 | SAS | |
| Atelier Lachassagne Baclet Architectes (Ethik-A) (Alba) | Lagny-sur-Marne 27 Rue Marthe Aureau, 77400 | 2018 | SAS | |
| Ateliers Bauve Architectes | Lagny-sur-Marne 11 Rue du Docteur Naudier, 77400 | 1990 | SARL | |
| Christian Hauduroy | Lagny-sur-Marne 1 Rue Claude Chappe, 77400 | 1987 | Sole trader | |
| Clement Gay | Lagny-sur-Marne 18 Rue Berthelot, 77400 | 2015 | Sole trader | |
| Efi Studio | Lagny-sur-Marne 15 Allee des Catalpas, 77400 | 2015 | SAS | |
| Frederic Merat | Lagny-sur-Marne 38 Rue du Pont Hardy, 77400 | 2000 | Sole trader | |
| IMAGIN03 | Lagny-sur-Marne 30 Rue du Pont Hardy, 77400 | 2019 | SARL | |
| In Silico Architecture (Isa) | Lagny-sur-Marne 31 Rue Charles Michels, 77400 | 2018 | SAS | |
| Isabelle Poulain | Lagny-sur-Marne 2 Rue des Etuves, 77400 | 2002 | Sole trader | |
| Julien Brunner | Lagny-sur-Marne 37 Rue du Pont Hardy, 77400 | 2010 | Sole trader | |
| Lucas Barraco | Lagny-sur-Marne 76 Rue Saint-Denis, 77400 | 2023 | Sole trader | |
| Philippe Villien | Lagny-sur-Marne 31 Rue Charles Michels, 77400 | 1987 | Sole trader | |
| Pyz Architecture | Lagny-sur-Marne 11 Rue du Docteur Naudier, 77400 | 2013 | SAS | |
| Pyz Architecture | Lagny-sur-Marne 9 Rue Paul Bert, 77400 | 2013 | SAS |
Architects near Lagny-sur-Marne
All architects – Seine-et-Marne (77) →Architects in Lagny-sur-Marne: common questions
How many architects are there in Lagny-sur-Marne?
The Sirene register lists 18 active architecture practices in Lagny-sur-Marne: 11 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 Lagny-sur-Marne?
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 Lagny-sur-Marne (height, position, appearance) are set out in the local plan (PLU).
How much does an architect cost in Lagny-sur-Marne?
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.