In this study, the authors are analysing activities of energy efficiency improvement, regulatory framework and possibilities to attract financing for energy efficiency improvement of a residential house. The aim of the study is to prove the necessity of increasing the energy efficiency of residential houses and economic benefits for apartment owners. Several methods used in the study: general scientific methods (analysis of theoretical sources and statistics, descriptive method), mathematical statistical methods (comparison of economic benefits of financing models) and empirical research methods (survey, expert interviews, discussions with industry experts). The authors in the study calculates the heat energy savings and repayment of the invested money for the residential house and owners of apartments. Authors are comparing different financing methods to find the most economically advantageous financing model. In the study, there is the process of technical inspection and energy efficiency improvement process described, and apartment house resident`s survey about energy efficiency improvement activities analysed. Laws and regulations of the European Union legislation, Republic of Latvia, municipal regulations, Internet resources and scientific literature used in this study. Main conclusions and suggestions for reduction of investments of energy efficiency improvement activities project of residential house apartment are made.