SE23 is around the national average for energy efficiency.
The 12,023 EPC certificates on record for SE23 paint a clear picture — the area averages 66 out of 100, placing it around the national average. The national average is 67, which means SE23 performs roughly in line with the rest of the country. The most common rating band is D, with 5.9% of homes rated A or B and 80.7% in the C or D bands. Meanwhile, 1.9% 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.
Flats make up the bulk of the housing in this district. Flats alone account for 60% of all certificated properties — a distinctly urban profile. Around 50% of properties are owner-occupied , while 25% are privately rented and 25% are social housing. Gas central heating is the main fuel source for 93% 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 66 to 77 — a 11-point jump that would lift the typical rating to C. If you live in SE23 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: 77 (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 SE23?
Homes in SE23 have an average EPC rating of D, scoring 66 out of 100 for energy efficiency. That figure comes from 12,023 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 SE23 are rated F or G?
1.9% of homes in SE23 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 SE23 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.