The Racine Tower in Paris’s 12th arrondissement has undergone a significant transformation led by Maud Caubet Architectes. Originally built in the 1970s as the headquarters of the Office National des Forêts (ONF), the 35-meter-high brutalist structure has been repurposed into a multi-use space for the Local Business Skills Operator (OPCO EP). The renovation focuses on sustainability, adaptability, and biophilic design, reflecting a broader shift towards the regeneration of existing buildings rather than demolition and reconstruction.

Adaptive Reuse and Future Flexibility
A key aspect of the project is the retention of the building’s original concrete framework, ensuring minimal material waste while allowing for future adaptability. The structural modifications support a flexible interior layout, making it possible to accommodate various functions, including offices, housing, student residences, and hospitality spaces. The integration of new elements has been designed to minimize environmental impact while enhancing the building’s usability and connection to its surroundings.

Green Infrastructure and Urban Biodiversity
Landscape reintegration has played a central role in the renovation. The former artificial ground level has been replaced with terraced gardens, introducing greenery to the urban setting and promoting biodiversity. A productive green roof covering 175 square meters contributes to urban cooling and air quality improvement, aligning with ecological urban planning principles. The uppermost level of the tower has been reconstructed using a timber frame, replacing the former attic with a glass-enclosed greenhouse. This space serves as an educational urban agriculture hub and includes a café, offering building users access to a shared green environment with views over the city. The greenhouse contributes to the building’s biophilic strategy while also functioning as a visual landmark at night.

Sustainable Materials and Environmental Performance
The project incorporates sustainable material choices, including timber for the new structural elements, glass façades to maximise natural light, and extensive vegetation to support biodiversity. The environmental approach has been recognized through multiple certifications, including HQE Excellent, Effinergie+, and BiodiverCity. The repurposing of underground parking areas into naturally lit workspaces demonstrates an effort to optimize existing resources while reducing reliance on artificial lighting.

A Model for Urban Transformation
Racine Tower represents a model for contemporary urban transformation, demonstrating how existing structures can be adapted to meet modern sustainability standards. By integrating material efficiency, biophilic design, and circular principles, the project highlights an alternative approach to urban development that prioritizes renovation over reconstruction. Delivered in 2024 for Alderan (SCI EWOK), the project reflects a commitment to creating a dynamic, environmentally responsible, and adaptable space within the evolving fabric of the city.

Source: Maud Caubet Architectes / Alderan
Photos: Fabrice Fouillet / Laurent Kronenta / Giaime Meloni