At the present stage, a significant pool of financial instruments can stimulate the growth of energy efficiency indicators by industry. In the process of the research, solutions and measures of optimal conditions that can contribute to improving the energy efficiency of buildings were studied. A residential building located in Almaty for research was chosen, for which the costs of energy efficiency projects were calculated. Based on the modeling of the measures, we can conclude that the proposed system can objectively evaluate not only the available data for specific objects, but also offer specific recommendations for improving the energy efficiency class of buildings according modern standards. For economic and financial evaluation of energy efficiency projects in buildings, several methods and indicators were used: simple payback period; net present value and internal rate of return, cost of energy savings. Key elements of the methodology are: selection of a reference building; determination of measures to ensure target levels of energy efficiency and thermal protection parameters and assessment of cost; conducting financial and economic analysis of projects. An important conclusion on the use of financial instruments is that government bodies need to rethink the concept of energy efficiency, that must are used as independent energy source, the value of which is equal to the cost of energy resources saved.