Research, undertaken by BOXT, has revealed how much a home’s value can increase when more energy efficient.
If a house has 20%-29% of EPCs at grade C and above, then improving it to between 30%-39% can increase your house’s value by almost 30%.
| EPC Percentage | Range | Average House Price | Percentage Increase |
| 20%-29% | £110,890 – £373,425 | £208,373 | 28.02% |
| 30%-39% | £131,036 – £770,509 | £289,503 | 17.04% |
| 40%-49% | £122,818 – £1,451,567 | £348,987 | 11.32% |
| 50%-59% | £165,940 – £1,030,679 | £393,531 | 36.34% |
Below 40% is still under the average across England and Wales. By increasing the percentage of EPCs at grade C and above, homeowners could potentially add the equivalent of just over £60,000 to your house’s value.
11% might not sound like much, but with the house price value increasing, it could potentially equate to an additional £45,000 on top of a house’s value.
The biggest increase in house value is from 50%-59% to above 60%. However, it’s important to note that there are only two places in England and Wales that have 60% of EPCs at grade C and above.
Overall, by increasing the percentage of EPCs at Grade C and above by around 10%, homeowners could potentially add 23% to a house’s value. It will take some investment to improve this though, however, in the long run, it could be hugely beneficial.
| Rank | Local Authority | Region | Percentage of EPCs at Band C and Above | Average House Price | Energy Value Score /10 |
| 1 | Knowsley | North West | 52% | £165,940 | 9.31 |
| 2 | Salford | North West | 58% | £205,603 | 8.79 |
| 3 | Halton | North West | 46% | £178,034 | 8.53 |
| 4 | Telford and Wrekin | West Midlands | 52% | £212,946 | 8.48 |
| 5 | Torfaen | Wales | 45% | £185,046 | 8.26 |
| 6 | Peterborough | East of England | 53% | £231,752 | 8.15 |
| 7 | Stockton-on-Tees | North East | 43% | £157,356 | 8.08 |
| 8 | Manchester | North West | 48% | £216,663 | 8.06 |
| 9 | Sunderland | North East | 42% | £142,041 | 8.04 |
| 10 | North Tyneside | North East | 45% | £193,554 | 8.03 |
Knowsley in Liverpool region tops the list with a percentage of EPCs at grade C and above 12% higher than the average. This coupled with a reasonable house price of £165k, makes for a perfect balance.
Despite having a higher percentage of EPCs at band C and above, Salford has a higher house price which places it second on the list. Salford has the highest number of grade C and above EPCs in the North West region, with Knowsley second in that list.
Continuing with the North West theme is Halton which takes third place with an energy efficiency score of 8.53.
The Cheshire local authority has a low house price with the percentage of EPCs at grade C and above 6% higher than the average.
