The original building, constructed in the 1970s, sits set back from the street within a residential fabric in Neuilly-sur-Seine. The current brief emerged from a dual ambition: to reclaim this underutilized setback, to reconcile the building with its residential surroundings, and to elevate it to contemporary standards of performance and comfort. The project is part of a broader reflection on the obsolescence of 20th-century office real estate. Facing the climate emergency and the urgent need to limit demolition-and-reconstruction, it proposes an alternative: architectural resilience through densification and transformation.