The project includes the implementation of energy efficiency (EE) measures of a multi-family residential building on the territory of the city of Nova Zagora - 5 "Alexander Stamboliyski" Street. The main goal of the project is to provide better living conditions for the citizens, thermal comfort and a higher quality of the living environment, by renewing the housing infrastructure. The activities include installation of thermal insulation and replacement of the windows of the site, waterproofing of the roof, repair of chimneys and lighting installations, construction of an accessible environment for people with reduced mobility and people with disabilities, i.e. all activities prescribed by the consultant who performed the energy survey of the building. The implementation of the construction and repair activities will contribute to raising the energy efficiency class of the dwellings to class "A" and improving the operational characteristics and extending the life cycle of the building itself. The introduced EE measures will improve the standard of living of 11 no. households. The modernization of residential buildings through the introduction of EE measures will lead to an improvement of the microclimate and, accordingly, living conditions, and as a result, the quality of life will increase in the entire city. After carrying out the planned activities, a decrease in harmful carbon dioxide emissions in the environment is expected, which in the long term will have a positive impact on the general ecological condition.