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Can I get another EPC done if I think my first one is incorrect?

Posted by Tasha Kosviner on 14 August 2014 at 6:41 am

Q. I am considering installing a biomass boiler. I have had a green deal assessment done including the energy performance certificate in preparation for claiming domestic renewable heat incentive. I'm not quite sure that the assessment of my annual energy needs (kWH) is as high as it could be. Is there anything to stop me paying for a second EPC opinion?

A. EPCs are valid for 10 years and people usually only get another one done before the old one expires, if they’ve made substantial changes to the property.

However when it comes to the renewable heat incentive, the amount you get paid will depend on the amount of renewable heat your system is generating. Therefore, the higher the heat demand as recorded on your EPC, the more heat your system will need to generate and the higher the RHI payments you get.

In answer to your question then: no there's nothing to stop you having a new EPC done. You should be aware though that once your new EPC has been lodged, it will override the old one which will then no longer be valid. 

Before you go to the hassle and expense of having a a new one done, it might be worth talking to your assessor about their findings. They are obliged to put right any errors that might exist and if they fail to do this, you can take it up with their acreditation body, the details of which will appear on your EPC.

Whichever route you decide to go down, I'd be very interested to hear how you get on! 

More information

YouGen guide to the renewable heat incentive

What can I do if I think my EPC is wrong?

Photo credit: London Permaculture via Flikr cc

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2 comments - read them below or add one

Cathy Debenham

Cathy DebenhamComment left on: 3 November 2014 at 2:43 pm

Hi Graham

The EPC assesses the fuel cost per meter squared of a property, based on a number of assumptions some of which are not ideal. One of these is how renewable heating systems, especially biomass are rated in the EPC. They tend to score lower than oil or LPG even though they are much more efficient (see this blog and the comments beneath for more info).

Another thing I'm strongly against is its tendency to recommend building mounted wind turbines which have been shown to be pretty ineffective in most cases. 

I don't have the expertise to tell you if your house has the potential to achieve D or above. However, I do know that for old leaky houses, the cost of doing so is often prohibitive.

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Graham Marshall

Graham MarshallComment left on: 17 October 2014 at 7:53 am

I understand that the EPC is based on averages and ignores actual occupancy and usage. The rating it produces is, therefore and average. The recommendations are, presumably, intended to raise the energy efficiency but do they achieve this if the best rating they can produce is still below the average of all houses?

My EPC has rated our uninsulated, partially LPG heated solid walled Victorian villa as G1/G18. It tells me that of I complete all of the energy performance measures recommended I can achieve E47/E52. Since this is below average I lose out on FIT payments fro solar PV.

What is worse the measures recommended include one which would be impossible in our conservation area and potentially harmful to the house, wind power. Another recommends upgrading our boiler but not changing our fuel, this ismentioned as an afterthought at the end of the report.

Is the methodology at fault or the assessor? Surely if I move to renewables instead of installing the upgraded LPG boiler my rating could be higher than that stated. If I add internal wall insulation which achieves the .3 rating , double glaze every window, stop every draught install recommended levels of floor and loft insulation it must be possible to achieve at least an average rating?

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