This is going to need clarifying, because it seems to be bad news for people in historic buildings who are unable to bring the buildings up to grade C, or those who have to erect panels in the orchard, garage or uninsulated outbuildings because the house is historic, listed or is encrusted with chimneys and dormers. You need EPCs in order to sell a house, so there is now a small industry of EPC assessors. Google "EPC" and you will find loads, including some companies based in West Bridgford/ Rushcliffe. If your house does not yet meet grade C, then you will get advice from the assessor on how far it can be taken.
How do you get an EPC?
• EPCs are explained further on the DECC website,
• It costs between £30 and £70 to get an EPC evaluation, there are many companies offering to do one. See this page:
• Here's an example of a EPC for a house in 'AnyTown'
Does the Peveril Solar house have one? No, not yet, it wasn't required when we built it, but perhaps we should do so, if its only £30-£40 to get one. Although the PV makes the house Carbon Zero, the requirement is for the house itself without the PV. Our insulation is very good and the annual heating requirement is low, being about 100 kWh/Sqm/annum base requirement, but because we use an efficient heat pump, it is only requiring only 26 kWh/Sqm/annum to space-heat and provide hot water. On heating alone, it is only requires 20 kWh/Sqm/annum, which is better than the Passivhaus requirement for existing houses. So it should be A rated, but I will get it rated independently anyway.
I've made a phone call to arrange to have one done in the next couple of weeks. The assessor says that PV is taken into account, and their rating includes recommendations for the 'potential' grading providing the basic house underneath gets improvements in insulation.