Tour Bretagne reconversion is a mixed-use redevelopment of the 144-metre office tower in central Nantes, France. The building, which was completed in 1976, closed in 2020 after asbestos was discovered and its occupants left; the project aims to bring the landmark back into use through a full rehabilitation and extension. 139
The principal developer is Groupe Giboire, the building’s main owner. The architectural team is PCA-STREAM and MAGNUM Architectes et Urbanistes, selected in October 2023 after a consultation launched by Giboire in January of that year. The scheme was presented on 21 November 2024 by Michel and François Giboire, alongside project representatives and the architects, in the presence of Nantes mayor Johanna Rolland. 1211
The plans replace the tower’s former offices with about 200 homes across 30 floors, most with loggias. The lower levels are to include a four-star hotel with around 100 rooms, a restaurant, shops, coworking space and areas for social-purpose activities. A panoramic public viewpoint is planned at the top, alongside spaces for cultural and social use; the project also includes a free public terrace. 124
The design retains the tower’s recognisable form while giving it a lighter exterior. Work was planned to begin with building clearance and asbestos removal, followed by rehabilitation and extension; the developer’s published schedule gives a target completion in 2028–2029. 129