Every Commercial building is different, some more complex than others with different heating, cooling and ventilation systems, different construction methods and of course vastly varying in size. For this reason it will be necessary to provide you with a quote before the assessment. 

Each building will need to be fully surveyed in accordance with the information required to produce the EPC and therefore the size and complexity of the building, and the availability or otherwise of information about the building from the owner, will determine how long it takes to produce the EPC.