Improve Your EPC Rating

At the time of writing this paragraph (29th June 2025), the methodology for EPC assessments of existing dwellings in England & Wales is RDSAP 10, and a significant methodology overhaul from RDSAP to the Home Energy Model (HEM) is proposed for 2026 onwards. Government consultation was launched in December 2024 which included suggested changes to the format of EPCs. Also, changes to the MEES requirements of properties in the Private Rental Sector (PRS) have also been suggested for 2028 and 2030 in further government consultation launched on 7th February 2025. Therefore, approaches for improving EPC ratings in the near future will change.

I'd like the EPC rating of your property to be the best it can reasonably be.

In this section you'll find a number of areas to consider where it might be possible to improve the EPC rating of your property.

We'll cover things that range in both cost and ease, from low cost to high cost, and from easy to implement up to more involved. I hope though you can work through the list and pick out things that are suitable and accessible for your property.

Some of these things will actually improve the energy performance of your property, and some will help you around intricacies of how the assessment methodology works.

In particular, I recommend you take a look at the 'Heating Systems' page first, which covers two particular intricacies around 'Secondary Heating' and the count of 'Heated Habitable Rooms'. That one page might help you significantly.

Please note your property will produce different levels of improvement to any indications provided in these pages due to differences between my property and yours. Various factors contribute together in the calculation of an EPC rating.

The best approach to improve your EPC rating is to engage with a local Domestic Energy Assessor (DEA). They can model changes to your property and advise on what you would need to do to increase the rating, or model changes you have in mind and advise accordingly.

It's important to do this before making decisions, as you will be working from a position of certainty when you do finally proceed with any work.

Just a couple more caveats and we'll get going:

We're looking here at the assessment of existing domestic properties, where the RdSAP methodology is used, ie not domestic new builds (SAP) or commercial properties (SBEM).

The government have launched two recent consulations with proposals that will alter approaches to EPC rating improvement, and will change what needs to be achieved by a property to comply with future MEES legislation.

So, work through each of the pages in this section, and see what you might be able to do with your property:

If you're still reading, I'd be really interested to hear from you. Please let me know if anything in this section of the website has been helpful. Is there anything that has been a surprise? Is there anything that has really helped you? Do you have anything you would add? Please click on the Contact page and send me an email. Many thanks.

Piers