In accordance to the EU directive 2002/91/ES on the Energy performance of Buildings, Swedish commercial real estate owners are obliged to undergo an energy performance certification (EPC) of their building stock. But does a good EPC rating have an impact on the commercial buildingsí market value? In this article we are using a unique Swedish panel data set, in which Swedish commercial buildings economic performance (such as vacancy rates, rents, location etc.) have been linked together with the public EPC:s. As such, we have been able to investigated the EPC:s impact on the buildings assessed market value.