Lot B1 is located within the ZAC La Haute Maison in the town of Champ-sur-Marne, near the future multimodal hub of the Grand Paris Noisy/Champ. The project of approximately 30,000 sq.m includes family housing, offices, shops and a day nursery. It is designed to forge new links between the Descartes cluster and the neighbouring residential districts, which are currently disconnected and isolated on both sides of the railway infrastructure. This ambition is driven by a logic of mutualisation of spaces. (Conciergerie in the Lot, Coworking, shared gardens, company restaurant open to residents, guest room, rooftop, 5 senses walk, work of art, recycling collection service ...) and relayed as part of a consultation process. An architectural, urban and landscaped project, lot B1 is also the support of an applied research approach, enabling the implementation of proven environmental solutions through simulations (sunshine, aeraulics and venturi effect, access to view, urban microclimate, vibrations...). To develop these innovations, partners such as Elithis and Urban Practices, Linkcity, Bouygues Bâtiment IDF, RATP and CSTB are involved alongside EPA Marne.