As the capital of Morbihan and the economic hub of southern Brittany, Vannes is experiencing sustained demand for new homes, home extensions and the renovation of older buildings. The outlying towns of Arradon, Baden, Séné, Saint-Avé and Plescop are experiencing the same dynamism. Our editors have selected the 10 best builders in Vannes in 2026, with a special mention for Axxens Créhabitat, a leading name in the Gulf of Morbihan for over twenty years.
If you choose to work with a project manager in Vannes, you'll have a single point of contact who will oversee the entire project, from the design stage right through to acceptance of the work, including applying for planning permission and coordinating the work of the tradesmen. Unlike a house builder, the project manager does not sell a catalogue and does not take a margin on the services provided by the craftsmen - every euro spent goes directly to the contractor.
In the Pays vannetais, house extension projects in Vannes are subject to strict town planning regulations: Coastal PLU, AVAP in the historic centre, architectural constraints linked to the Gulf of Morbihan Regional Nature Park. Choosing a project manager with local roots, who is familiar with these rules and has experience of working within them, is a real advantage from the feasibility phase onwards.
When it comes to building a new house in Vannes or renovating a house in Vannes, the key criteria are local experience, the size and quality of the network of craftsmen, cost transparency and the ability to manage the administrative procedures from A to Z. Top of our ranking: Axxens Créhabitat.
📚 Also read
Are you working on a project in Morbihan? These guides will help you find the right professional.
| Rank | Name | Highlights |
|---|---|---|
| 1 | Axxens Créhabitat | 20+ years, 3 branches, energy audit, local craftsmen, 3D plans, RE 2020 |
| 2 | Design and traditional houses | Project management since 2001, custom new build, RE 2020, Séné & Auray offices |
| 3 | Concept and Creation | Founded 1989, longere renovation, seaside construction, local expertise |
| 4 | Arcom Habitat | Eco-construction, professional buildings, recognised responsiveness, La Vraie Croix |
| 5 | Créacor | Vannes & Pontivy design office, RT2012/RE2020, personalised follow-up |
| 6 | Building Tomorrow | Custom-built contemporary houses, 6 pros, Ploeren |
| 7 | A2l Project management | SAS vannetaise, construction & renovation, Ténénio business centre |
| 8 | Mastore West | Rigorous management, deadline & cost management, Vannes |
| 9 | Bati Confort | Extension, renovation, planning permission, Séné |
| 10 | Gwenan Expertise SARL | Building expertise, project management, technical consultancy, Vannes |
Established in Morbihan since 2002, Axxens Créhabitat has its Vannes branch in the heart of the town, covering the whole of the Vannes region and the communes of the Gulf of Morbihan: Vannes, Arradon, Baden, Séné, Theix-Noyalo, Saint-Avé, Plescop, La Trinité-sur-Mer, Sarzeau, etc. This local presence guarantees in-depth knowledge of local planning regulations and the specific architectural features of the area.
For the construction of a new house in Vannes or a house extension in Vannes, Axxens takes charge of the entire process: free feasibility study, preparation of technical plans, 3D visuals, application for planning permission, selection and coordination of qualified local tradesmen. Each cost is itemised by trade - only what is actually carried out is invoiced, with no mark-up on tradesmen's services.
When it comes to renovating houses in Vannes, Axxens Créhabitat is well versed in the constraints of old Breton buildings: stone longères, village houses and 1970s pavilions. As a certified energy auditor, the company systematically checks that each renovation project is eligible for government support (MaPrimeRénov’, prime Renov), to help reduce the cost to the homeowner.
For house extension projects in Vannes, Axxens manages both single-storey extensions and timber-frame extensions or conversions, in coordination with the Architectes des Bâtiments de France when the project is located in an AVAP area or near a listed building.
For your project in the Vannes region, a free study is available on request. Find all the information and projects on the page project manager in Vannes.
What the editors liked: Axxens is the partner of choice for any project in the Vannetais region, offering support from A to Z, financial transparency and expertise in the regulatory constraints of the Gulf of Morbihan.
📍 Axxens Créhabitat, 55 avenue du Président Édouard Herriot, 56000 Vannes, Tel: 02 97 29 47 72
Established since 2001 in Séné, just outside Vannes, Design and traditional houses specialises in the construction of custom-built single-family homes in Morbihan. The design office has two branches - in Séné and Auray - to guarantee local support. Each project meets RE 2020 standards, and is rigorously monitored, with regular reports and deadlines met.
The company supports its customers from drawing up the plans to applying for planning permission, including selecting the tradesmen and monitoring the site. Areas served: Vannes, Séné, Auray, Elven, Grandchamp, Questembert and surrounding municipalities.
What the editors liked: MDT's impeccable site supervision and ability to support customers remotely make it a trusted address for new-build projects in Morbihan.
📍 Maisons Design et Traditions, 66 route de Nantes, 56860 Séné
Founded in 1989, Concept and Creation is one of the oldest project management agencies in Vannes. For more than three decades, Jacky Jossé and his team have been helping private individuals with their construction, renovation and extension projects, with a resolutely artisanal approach.
The agency works on a wide range of projects, from rehabilitated Breton farmhouses to contemporary houses by the sea and extensions to detached houses. Its accumulated expertise in the specific features of Morbihan buildings - coastal humidity, PLU constraints, noble materials - is a rare asset.
What the editors liked: The longevity of the agency and the consistent quality of its work, from seaside projects to the renovation of long-established houses, bear witness to a level of craftsmanship that is hard to match.
📍 Concept et Création, 56000 Vannes
Directed by Denys Lavaud, Arcom Habitat is a small-scale project management company based in La Vraie Croix and operating throughout the Vannes area. The company works with private individuals and professionals from design to handover, specialising in eco-construction and renovation.
Responsiveness, attentiveness and a solid network of craftsmen are the qualities regularly cited in customer reviews. The company handles both new wooden buildings and complete renovations of business premises.
What the editors liked: Its human dimension and eco-construction specialisation make it particularly well suited to unique or demanding projects.
📍 Arcom Habitat, 56250 La Vraie Croix (Vannes sector)
Located on rue Anita Conti in Vannes, Créacor covers a vast area from the Vannes region to Pontivy. The firm supports its customers from the design stage through to site supervision, and is fully compliant with RT2012 and RE 2020 standards.
Personalised monitoring and rigorous management guarantee transparency and cost control at every stage. The Vannes-Pontivy coverage is an asset for projects in rural or peri-urban areas of inland Morbihan.
What the editors liked: Its dual location and expertise in energy standards make it an ideal partner for projects covering a wide geographical area.
📍 Créacor, 22 rue Anita Conti, 56000 Vannes
Created by Fabrice Perin and based in Ploeren, Building Tomorrow designs contemporary, made-to-measure houses - single-storey or two-storey - for individuals in the Vannes basin. The team of six professionals takes complete charge from design to delivery.
The agency's signature: aesthetic, ergonomic and timeless homes, with particular attention paid to design and the quality of finishes.
What the editors liked: The combination of an assertive design approach and meticulous technical execution positions Construire Demain as an interesting player in contemporary new-build construction.
📍 Construire Demain, 56880 Ploeren
Incorporated as a simplified joint stock company and based at the Ténénio business centre, A2l Project management supports its construction and renovation customers in strict compliance with current standards. The agency manages the design of plans, administrative procedures, coordination of trades and acceptance of work.
Its location at the heart of the Ténénio business park makes it easy to talk to the local institutions. Suitable for both residential and commercial projects.
What the editors liked: The SAS structure and its location in the main business centre of Vannes bear witness to a solid professional organisation.
📍 A2l Maîtrise d'œuvre, 10 rue du Dr Joseph Audic, Centre d'affaires du Ténénio, 56000 Vannes
Located in allée François-Joseph Broussais in Vannes, Mastore West manages each stage of the project with rigour and clarity. The agency simultaneously manages deadlines and costs, from design to delivery.
Mastore Ouest positions itself as a trusted partner, listening carefully, providing personalised follow-up and a transparent approach to secure the client's investment at every stage of the project.
What the editors liked: Mastore Ouest is a solid address for construction and renovation in Vannes, thanks to its clear follow-up and optimised management of deadlines.
📍 Mastore Ouest, 15 allée François-Joseph Broussais, 56000 Vannes
Located in Séné, two kilometres from Vannes, Bati Confort specialises in building extensions and renovations for all building trades. The company is responsible for applying for planning permission and rigorously monitoring residential extension projects.
The ideal profile for homeowners in the Vannes-Séné area who want to extend their living space without the need for a large design office.
What the editors liked: Our specialisation in building extensions and our immediate proximity to Vannes make us an ideal partner for extension projects.
📍 Bati Confort, 2 route de Nantes, 56860 Séné
Established on avenue de la Marne in Vannes, Gwenan Expertise SARL offers project management services focused on technical advice and assistance to project owners. Its position as an independent expert gives it an objective view of construction and renovation projects.
The agency also provides project management assistance and site supervision, with the capacity to handle complex projects requiring a neutral expert opinion.
What the editors liked: Gwenan's independent advice and technical expertise make it a useful address, particularly for complex projects or disputes.
📍 Gwenan Expertise SARL, 81 avenue de la Marne, 56000 Vannes
French French
English
