EPC Rating Explained: A, B, C, D, E, F, G, H

What does EPC rating mean or what is EPC rating? An Energy Assessor will need to visit your property to work out your EPC Rating. Once an assessment has been carried out – it takes about 30 minutes – the data is input into software which works out your Energy Rating – also known as an Energy Efficiency Rating.

It is measured on a scale from A (most efficient) to G (least efficient) and is valid for 10 years. The EPC comprises of two main charts which I go into more detail below.

Energy Efficiency Rating

This is a rating of the overall efficiency of a home. A higher rating means the home is more efficient which in turn means lower energy bills.

Environmental Impact CO2 Rating

This is a measure of the properties impact on the environment in terms of carbon dioxide (CO2) emissions. The higher the rating, the less negative impact it has on the environment.

SAP Standard Assessment Procedure Rating

An EPC shows the current Standard Assessment Procedure (SAP) Rating for a property. This procedure is the recommended governments procedure for producing an energy efficiency rating.

What's A Good EPC Rating?

I get asked this a lot. As I will discuss below, most properties have EPC Ratings of either C or D. Sometimes it is not possible to get higher ratings, or indeed not practical due to the type of property you own.

EPC Rating A

For a property to achieve an A rating it must score 92-100 SAP points.

0.09% of properties lodged on to the UK Government's EPC Register are A rated.

EPC Rating B

For a property to achieve a B rating it must score 81-91 SAP points.

8.39% of properties lodged on to the UK Government's EPC Register are B rated.

EPC Rating C

For a property to achieve a C rating it must score 69-80 SAP points.

27.68% of properties lodged on to the UK Government's EPC Register are C rated.

EPC Rating D

For a property to achieve a D rating it must score 55-68 SAP points.

38.70% of properties lodged on to the UK Government's EPC Register are D rated.

EPC Rating E

For a property to achieve an E rating it must score 39-54 SAP points.

18.43% of properties lodged on to the UK Government's EPC Register are E rated.

EPC Rating F

For a property to achieve an F rating it must score 21-38 SAP points.

5.20% of properties lodged on to the UK Government's EPC Register are F rated.

EPC Rating G

For a property to achieve a G rating it must score 1-20 SAP points.

1.51% of properties lodged on to the UK Government's EPC Register are G rated.

How To Improve My EPC Rating?

There are some ways to improve your EPC Rating. I have listed some of the improvements you can make below and also indicative rating increases and also estimated yearly savings. Note, these are my estimations because each property is unique and this improvement is only one data point that being input into the system.

For information purposes only.

ImprovementRating IncreaseYearly Saving
Condensing boiler47£225
Cavity insulation13£100
Roof insulation10£100
Cylinder insulation6£50
Cylinder stat5£50
Double glazing5£100
Low energy Lighting3£20



Note, implementing all of these improvements will see a lower cumulative improvement in the score. Rating increases shown above are estimated increases and not to be relied on for any individual property.


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