The operation concerns the rehabilitation of 130 housing units in Longuyon and Villerupt. The aim of the works is to reduce the building's consumption (reach the level of the BBC Effinergie Rénovation label) and improve the safety, comfort of residents and green spaces. The renovations concern the following items: - work aimed at a certain energy performance (insulation, technical equipment, replacement of joinery, etc.); - work related to the fire safety of buildings (smoke extraction, fire-resistant rooms, etc.); - rehabilitation works inside dwellings and in common areas (sanitary equipment, renovation of entrance halls, etc.). - architectural improvements and improvements to the layout of outdoor areas: Treatment of facades, upgrading of entrances, fitting-out of outdoor areas in order to enhance the image of buildings and the neighbourhood by working on the overall aesthetics - Electrical safety: it concerns the electrical safety of housing and common areas