The paper examines the reasons for carrying out the facsimile reconstruction of Villa Boži? in Banja Luka, with the application of energy efficiency measures. The villa was built in 1912 by the prominent Croatian architect Rudolf Lubynski. It was heavily damaged by an earthquake in 1969 and completely demolished in 2002. The proposal to reconstruct the entire villa in its original form takes into account its historical value, the possibility to change its use and use modern materials to reduce its energy consumption. The methods proposed concern the installation of thermal insulation, LED lighting and geothermal heat pumps. Relevant computer software was used to simulate the results of the proposed energy consumption scheme. The results obtained taking into account the proposed energy efficiency measures are compared with those obtained without their application.