• With 64% of all homes being between D – G on their EPC rating, Yorkshire and the Humber has the least energy-efficient homes in the country.
  • London has the best average EPC rating per home, with just under half (47%) of all residential properties in the capital having between C – A.
  • The average cost to bring a home from an energy efficiency rating of G up to a C – A would cost around £31,000 (property size dependent).

According to Government data, 2022’s winter energy bills averaged 96% higher than the previous year. As such, it has never been more expensive to heat a home, regardless of if the property uses gas or electric heating methods.

Last week Rishi Sunak scrapped some of his ‘green initiatives’ that would have forced landlords to upgrade the Energy Performance Certificates (EPC) of their homes. This means some residents will be paying the price of heating a home that does not contain the warmth effectively. 

As the policy was scrapped, JF Heating decided to conduct research to see which of England’s regions has the highest percentage of homes with a poor EPC energy efficiency rating (from grade D to G). They did this by analysing the UK Government’s home EPC database, taking the quantity of homes per region and their listed EPC ratings. Then, they calculated the percentage difference in figures. 

The regions in England with the worst-to-best EPC ratings

RegionNumber of Lodgements (homes)Percentage of properties (D – G rating)
Yorkshire and The Humber2,336,85364%
West Midlands2,324,92762%
East Midlands2,015,50860%
North West3,177,71860%
South West2,427,62059%
North East1,221,29458%
East of England2,525,56156%
South East3,777,35456%

The data revealed that those living in Yorkshire and the Humber have, on average, the worst homes for energy efficiency in all of England. Just over a third (36%) of the homes are EPC rated A – C, meaning 64% of homes are energy inefficient.

In the West Midlands, of the 2.3 million homes, 62% do not meet Government targets for energy efficiency, the second worst result in the country. Closely following behind is the neighbouring East Midlands, with 60% of homes not hitting EPC targets. This result is shared with those in the North West, also at 60%.

London has by far the highest quantity of homes with an EPC rating of A – C at 47%, with just over half (53%) falling into the D – G category. The high volume of new flats in London, built to the Government’s EPC recommendations, helps boost the region’s standings.

How much does it cost to improve a home’s EPC energy efficiency ratings?

Just because a home gets a poor EPC rating, it doesn’t mean that can’t be changed. Improvements such as home insulation, double/triple glazing and investing in renewable energy sources for the property can drive down your winter bills cost.

Home improvement actionCosts per sectorAverage combined costs
Upgrade lighting to LED light bulbs£100£100
Insulate roof   Insulate walls£500£555
Installing double or triple-glazed windows2-bed house: £2500 – £3500£3,000
3-bed house: £3500 – £5000£4,250
4-bed house: £6000 – £7500£6,570
Upgrade the boiler£1,800 – £3,200£2,500
Install underfloor heating£4,000 – £4,500£4,250
Invest in renewable energy£2,000 – £18,000£10,000
Overall average combined cost:£31,225

To take a home with an EPC rating of G to a C could cost homeowners up to £31,225. However, this is dependent on the size of the property and the cost of raw materials.

Notable upgrade costs include investing in renewable energy projects on the property, such as installing solar panels, at an average cost of £10,000. Underfloor heating installation comes in at just over £4,000, whilst changing from incandescent light bulbs to LEDs costs just £100. 

James Farquharson, Director at JF Heating, said:

“Families up and down the country have been feeling the pinch in 2023, with budgets tighter than ever. Exorbitant energy bills will cause undue stress to those struggling with heating their homes, but it doesn’t have to be this way. Improving the EPC rating of a property can save you money on each and every energy bill going forwards.

“Alongside the basics of keeping doors and windows closed during winter, consider fitting something like a smart meter, to help with monitoring your energy usage. Couple that with some small home improvements, such as insulation or double glazing, and you’ll start to reap the rewards during the winter months. Not only will your house feel warmer, but you’ll be saving money too.”