In Nantes, the consortium led by Bouygues Bâtiment Grand Ouest and including the specialist company CMB Bois have joined forces to design and deliver the 30 BEPOS Grand Carcouët housing units. The keywords in this project: less energy expenditure! The technical design of the housing was extremely advanced so as to obtain energy performance that allowed tenants to significantly reduce their heating and hot water bills: photovoltaic panels, energy recovery system for grey water, Heliopac system for producing hot water, etc. This exemplary project won the EDF Low Carbon contest in 2012 and won a prize at the 2015 National Wood Construction Awards in the Collective and group housing category.