BPM Architecture Agency by BPM Architectes

Sustainable Office Rehabilitation and Vertical Extension in Bordeaux, France

Located in Bordeaux, the new headquarters of BPM Architectes is a thoughtful architectural intervention that combines rehabilitation, vertical densification, and sustainable construction. Designed by the agency for its own use, the project reflects BPM Architectes’ architectural philosophy, technical expertise, and commitment to frugal, low-carbon design.

Rather than expanding outward, the architects chose to densify the existing urban fabric by elevating an existing building. This strategy responds directly to contemporary challenges of urban land scarcity, ecological responsibility, and adaptive reuse. The project transforms the original structure into a multifunctional space that accommodates workspaces, research areas, and zones for reflection, reinforcing the idea of the office as both a productive and intellectual environment.

The architectural approach integrates structure, interior design, and construction oversight into a single coherent process. The original stone and concrete base of the building was preserved, providing structural inertia and thermal mass, while a new lightweight extension was introduced above. From the second floor upward, the building transitions to a predominantly timber-framed structure, with more than 70% of the added elevation constructed in wood. This choice significantly reduces the load on the existing foundations while ensuring efficient construction within a dense urban context.

Timber construction plays a key role in the project’s positive carbon footprint. Beyond its environmental benefits, wood contributes to improved thermal comfort, indoor air quality, and occupant well-being. Facade insulation using wood wool further enhances energy performance, aligning the building with the goals of energy transition and sustainable architecture.

Environmental performance is reinforced through passive design strategies. The original stone facade and concrete structure provide thermal inertia, while the curtain wall facade minimizes heat loss thanks to its favorable north, northeast, and northwest orientation. At the top level, natural ventilation is optimized through skylights and provisions for ceiling fans, reducing reliance on mechanical systems.

The project also embraces a reuse-driven design philosophy. Existing materials and equipment were carefully reintegrated wherever possible, minimizing waste and reinforcing a circular approach to construction. This strategy reflects BPM Architectes’ commitment to resource efficiency and architectural sobriety, demonstrating how adaptive reuse can coexist with contemporary workspace requirements.

All photographs are works of 11H45