The potential impact of Energy Conservation Building Code (ECBC) of India, that is applicable on commercial buildings having more than 100 kW connected load or 120 kVA contract demand, has been analysed on six different type of buildings in Jaipur. Calibrated simulation models of these buildings have been created using their existing specifications to estimate the energy saving potential through ECBC. It has been found that the specific energy consumption of these buildings lie in the range of 137 kWh/m(2)/y for the case of government building to 386 kWh/m(2)/y for the private office. The energy saving potential with ECBC is in the range of 44 kWh/m(2)/y in Government buildings as lowest effect, whereas in case of the private office, it is estimated to be 128 kWh/m(2)/y. Percentage energy savings with ECBC compliance in these buildings vary from 17% in the case of institutional building to 42% in the case of Hospital building. Using these estimates and the trend of increase in commercial building energy consumption, the potential of energy saving in the city of Jaipur has been identified as 12,475 MWh/y in the next five years. (C) 2012 Elsevier B.V. All rights reserved.