Bassac SA engages in the provision of real estate development services. It operates through the following segments: Les Nouveaux Constructeurs, Marignan, Main Street, Kwerk, Concept Bau, ZAPF, and Premier. The Les Nouveaux Constructeurs segment refers to development activity for individual or collective housing and office buildings whose construction is entrusted to third parties in France. The Marignan segment includes development activity for individual or collective housing and office buildings whose construction is entrusted to third parties in France held at 100%. The Main Street segment involves retail properties in France. The Kwerk segment offers co-working spaces in and around Paris. The Concept Bau segment promotes individual or collective housing in Germany, the construction of which is entrusted to third parties. The ZAPF segment is involved in industrial prefabrication of garages. The Premier segment develops individual or collective housing in Spain whose construction is entrusted to third parties. The company was founded by Olivier Mitterrand on April 20, 1972 and is headquartered in Boulogne-Billancourt, France.