The mathematical model and algorithms developed for the energy optimization of the building areas without connection to centralized electricity and gas networks. The model takes into account particular climate conditions characteristic of sharply continental climate: big seasonal and daily changes in temperature, extremely low temperatures in winter.On the basis of the calculations and optimization of the model of joint use of a number of power supply system based on renewable energy sources (wind turbines, solar collectors, photovoltaic cells, heat pump) with a diesel generator cogenerationsource of electricity and heat. It is shown that this model reduces the energy consumption of diesel fuel and the environmentalburden on the territory of more than 1.5 times.The calculation results are the basis for energy efficiency projects farmhouse, which was implemented in the Sverdlovsk region (the village Rising). In 2009, the project received the National Environmental Award Vernadsky.