The aim of the project is to improve the energy efficiency of 3 residential buildings of the Housing Cooperative in Łańcut, at ul. Wyszyńskiego 45, 47, 49 with a total area of 3167.1 m². The project will result in: 1. Thermal modernisation of 3 buildings. 2. Reduction of the annual primary energy consumption in residential buildings, 3. Reduction of greenhouse gas emissions. The subject of the project includes the carrying out of thermal modernisation works in 3 residential buildings administered by SM in Łańcut. The project’s material scope was prepared on the basis of the Energy Audit and Technical Documentation. The scope of thermal retrofitting works is the same for all 3 buildings and includes the following tasks: 1. Warming of the outer walls; 2. Warming of the ceiling above the cellar; 3. Replacement of windows in dwellings; 4. Replacement of windows in cellars; 5. Modernisation of the central heating system and c.w.u.