The 12/14 City of Lens has a total of 482 individual dwellings built between 1921 and 1930. She is registered in the NPNRU – ANRU 2. This is the second programme to be launched after the one on rue Colbert (28 housing units). Specific features of the site: - Operation in zone ABF (Perimeter of historical monuments) - UNESCO classification - Exceptional city This operation concerns 49 dilapidated and poorly isolated housing classified in label G before works. The rehabilitation works will make it possible to achieve label C of the DPE 3CL 2021: - Plumbing, plumbing, gas heating, ventilation (installation of a CMV): 100% refurbishment; - Installation of double-glazed PVC exterior joinery and roller shutters on the ground floor and floor; - Replacement of the wooden front door with imposter; - Insulation of the facades from the inside, insulation of the roofs/attic, insulation under the floor of the cellars, insulation of the floors on the ground floor, insulation of the underside of the stairs towards the floor.