The subject of the project is the implementation of energy-saving measures on the apartment building Norská 4224/3 in Prostějov. It is a five-storey underglazed brick building that is owned by the city and is used for housing. Insulation of the perimeter casing, replacement of filling holes, insulation of cellar and soil, repair of balconies and loggias, new roofing and heat source replacement. The implementation of the project will reduce the energy performance of the building — class B will be achieved, the energy supply savings will reach at least 40 %.