BNP Paribas Real Estate and Eiffage Immobilier are developing a new mixed-use eco-district on block D5 of the ZAC Seguin-Rives de Seine, on the last available land in the Trapèze district of Boulogne-Billancourt. A four-building project comprising 12,800 m² of housing, including 3,900 m² of social housing, and above all 40,000 m² of new office space.