The implementation of the energy renovation project for the Police Station Zlastar Bistrica, at Stjepan Radića 1, 49247 Zlab Bistrica, will result in a reduction of annual primary energy consumption in the building by 177 385.05 kWh/a and 70.61 % by reducing heating energy consumption for building heating by 95.288 kWh/a and by 74 % after the implementation of the project. The result will also be a reduction of CO2 discharges by 18.38 kWh/a and by 74.44 % that will certainly have a positive impact on the conservation of the environment.