From Corporate Headquarters to a Coliving Project

Renovation of an Office Building in Bagneux

Location:

Bagneux, Île-de-France

Client:

SCCV Bagel, Territoire & Développement

Architecture:

Architecture et Territoire Design

Contractor:

Rubner Construction Bois

A former office building in the heart of Bagneux, south of Paris, underwent a remarkable transformation between 2025 and 2026. The former Sanofi headquarters, dating from the 1990s, has been converted to include coliving spaces and other facilities dedicated to communal well-being.

Rubner Construction Bois was commissioned to develop a complete solution for the manufacture and installation of the timber façades.

The six-storey building, with a floor area of 5,300 m², has been converted for mixed use: a medical centre occupies the ground floor, while the upper floors are dedicated to coliving units. The project team deliberately chose not to demolish the existing concrete structure, but to retain and renovate it. This bold decision brought complex technical challenges, but also delivered lasting benefits.  

To create timber façades that would fit the existing structure precisely, we supplied 1,970 m² of timber-frame elements and installed the composite façade panels.

The city-centre site required particular care, especially during the planning phase: the adjacent street had to be temporarily closed to allow a mobile crane to be set up, and there was virtually no space for storing materials. Precise scheduling was therefore essential. Thanks to off-site prefabrication at our factory in Rosny-sur-Seine and just-in-time deliveries, we were able to manage the complex logistics smoothly, carry out our work efficiently and safely, and complete our scope of work on schedule.  

For us, the Bagneux project is another example of how timber construction can help shape considered, adaptable and future-oriented urban design. By integrating contemporary timber architecture into existing buildings and improving their energy efficiency, we are making an important contribution to the development of sustainable, enduring cities. 

  

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