City 12 is made up of 492 dwellings. City 14 West is made up of 294 dwellings. The city 12/14 in Lens is registered in the NPNRU - ANRU 2. This is the third rehabilitation programme to be launched. For the record, the two previous programmes are: - Rehabilitation of 28 logts - City 14 West - Rue Colbert (delivery phase 01: 17 logts at the end of 2021 / delivery phase 02: 11 logts 1st quarter 2022), - Rehabilitation of 49 logts - Cité 12 - Rue Pierre Brossolette, rue Auguste Lefebvre, Grand Chemin de Loos, Avenue de la Fosse (work in progress / delivery of the 49 logts scheduled for May 2024). This operation is the subject of another ERDF grant application. Specific features of the site: - Unesco - Exceptional city (city 12) - Remarkable buffer zone (city 14 west) - Perimeter of historical monuments This operation concerns 39 dilapidated and poorly isolated dwellings classified on G label before works. The rehabilitation works will make it possible to achieve label C of the DPE 3CL 2021: Energy rehabilitation works: - insulation of the upper cellar floor, and installation of an insulating door, - peripheral thermal insulating overlay, - thermal insulation of the stairwell, the ceilings of the ground floor of the secondary part and the floor, - insulating partitions between shed and future kitchen (plan version 01), - insulation of the floors on the ground floor, - replacement of joinery (double glazing), - installation of the VMC, - central heating installation.