In the thesis different possible scenarios of pre-earthquake strengthening of the resident buildings, constructed between years 1945 and 1962. They are located in the center of Ljubljana. For this purpose two models were considered. The first one is based upon the cost-benefit analysis of the preearthquake rehabilitation. The analysis is performed in generalized way, because of the hypothetically distant possibility of different earthquake scenarios and difficulties in forecasting the exact probabilities of the earthquake intensity and probability and its effects on the structure. This model includes three possible scenarios for building rehabilitation: no action scenario, pre-earthquake strengthening and improvement of energy efficiency scenario and re-building scenario with equal ground plan characteristics. This model is very weak in its analytical power, as it on one hand gives clear indicators that the owners are not economically interested in the pre-earthquake rehabilitation, while on the other hands it has the strong impact of uncertain inputs. The second model is based on the owner's perception of seismic vulnerability and interest of investing in any pre-earthquake strengthening. We were also interested in how to include earthquake vulnerability in real estate value.