It is vital to note that energy consumption is one of particular relevance across a broad spectrum of the three sector concepts, including, but not limited to, the industrial, service and agricultural sectors. Consequently, the issue of energy consumption in the building sector has become a matter of significant global concern and energy consumption in the construction sector has emerged as one of the most important issues. With the growth of the rate of world population, the energy demand of buildings, especially the rate of energy consumption in the public buildings have been increasing rapidly. A variety of methodologies have been applied to regulate the energy consumption in public buildings. The application of these methods in the correct manner has been demonstrated to facilitate the expeditious detection of energy consumption in public buildings and the acquisition of more detailed information. As demonstrated by the findings of this study, the BIN Method which has been based on meteorological data, has been utilized to determine energy consumption values in buildings with a level of accuracy that has been comparable to real values. In this study, the energy consumption of a building belonging to Istanbul/Beykoz Municipality has been determined by means of the BIN method. In order to apply the BIN method, Dry Air Thermometer (DAT) temperature data in Typical Meteorological Year (TMY) values was used, which has been created from 25 years of meteorological data at Istanbul Göztepe station. The amount of required energy consumption for heating and cooling of the municipal administrative building has been calculated by using BIN method. A comparison has been achieved between the values obtained from the utilization of the BIN method and the actual invoice values. The result of the present study indicates that energy consumption in public buildings can be estimated realistically with the BIN method and that annual energy demand can be determined quickly and easily.