CM15 is around the national average for energy efficiency.
Data from 6,887 property assessments shows CM15 averaging 65 out of 100, placing it around the national average. For reference, the England and Wales average is 67 — so CM15 is around that benchmark. The most common rating band is D, with 8.6% of homes rated A or B and 74.6% in the C or D bands. Meanwhile, 2.3% of homes sit in the F or G bands — the least efficient categories. In practical terms, a rating of D means many homes here lose more heat than average — potentially adding £200-400 per year to energy bills compared to a C-rated home.
Walk through CM15 and you will mostly see houses. Flats make up a notable 21% of homes here. Around 75% of properties are owner-occupied . Gas central heating is the main fuel source for 89% of homes, which is typical for urban areas across England.
There is genuine room for improvement here. If every recommended upgrade were carried out, the average score could climb from 65 to 80 — a 15-point jump that would lift the typical rating to C. That is a substantial gain, suggesting many homes are missing basic efficiency measures. If you live in CM15 and want to reduce your energy bills, start with our guide to loft insulation — it is one of the most cost-effective upgrades you can make.
EPC Rating Distribution
Energy Efficiency Score
Potential score if all improvements made: 80 (rating C)
Recommended Improvements
Government funding may be available for some of these improvements. Check grants →
More data — property types, tenure & fuel
Property Types
Tenure
Main Fuel Types
Frequently asked questions
What is the average EPC rating in CM15?
Homes in CM15 have an average EPC rating of D, scoring 65 out of 100 for energy efficiency. That figure comes from 6,887 certificates issued across the district.
This is broadly in line with the national average of 67 — neither particularly efficient nor particularly wasteful. A D rating typically means higher-than-necessary heating bills, especially in older properties without adequate insulation.
What percentage of homes in CM15 are rated F or G?
2.3% of homes in CM15 fall into the F or G bands — the lowest energy efficiency ratings. Nationally, the figure is 2.9%.
This is actually better than the national picture, suggesting the housing stock in CM15 is in relatively good shape — though any home rated F or G would still benefit enormously from basic upgrades. Landlords should note that F and G rated properties cannot legally be rented out under current MEES rules.