In this study, the complex of buildings built in Turkey's eastern and western regions (Kirklareli-Pehlivankoy, and Gaziantep-Oguzeli) energy performance levels was investigated according to European specification. To determine these levels were used Building Energy Performance (BEP) program. It is a software that has been in force the protection of the environment and limitation of greenhouse gas emissions regarding primary energy and carbon dioxide (CO2) emissions of buildings, according to "Energy Performance Regulations at Buildings" of the Ministry of Environment and Urban Plannings since 2010. Building geometry, heating, lighting, ventilation, mechanical and technical values project data is entered into the program. It has been identified what the amount of energy required by the building through the program, daylighting needs for areas where the effectiveness of energy utilization daylight time from light and carbon emissions is. After all, under EU norms, evaluation of energy certification of buildings built in different regions of all energy, fuel costs, climate and regional differences revealed that changes were explained. A result, energy data of Gaziantep reception center which was built in Turkey's southeastern is lower than 8% energy data of Kirklareli reception center which was made in Turkey's region of Thrace. However, when looking at the results obtained carbon emissions, lighting, ventilation and hot water systems has been shown to occur in the near value for the two centers. It has been observed that there are differences in heating and cooling systems.