The object of the project is the Municipal Department of the Police of the Czech Republic Domažlice, Cosmonauts 165, building no. SO 07 p. 1650/11 and 5372/1, which will be repaired to the outer shell, partial replacement of window and door fillings that do not meet the required thermally technical properties. The project is oriented towards reducing the energy performance of the building. Its implementation will have a positive impact on the environment.