The operation is part of the rehabilitation of a mansion and the demolition — reconstruction of its annex in order to accommodate, in decent premises with all comforts, a shelter and social reintegration centre (CHRS), an emergency reception centre (CAU) and a family pension. In addition, COALLIA wanted to combine human solidarity with eco-construction by carrying out an ambitious project using environmentally responsible local resources (wood Picard and Metisse, bio-based insulation, from the Relay Research and Development Centre, an integration company) for a project serving the most vulnerable.