The project focuses on the energy renovation of a prison building in a city that would save 69.02 % of the budget for heating, in primary energy of 49.79 %, modernise the building’s design and improve the quality of life and work in the building with a positive impact on the environment. The target group of this project is made up of prisoners, judges, prosecutors and deputy prosecutors, officials and employees at judicial and penal authorities of the Ministry of Justice and citizens.