For the 7,801 homes assessed in SE27, the average energy score comes in at 65 out of 100, placing it around the national average. The national average is 67, which means SE27 performs roughly in line with the rest of the country. The most common rating band is D, with 7.1% of homes rated A or B and 78.8% 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.

Flats make up the bulk of the housing in this district. Flats alone account for 57% of all certificated properties — a distinctly urban profile. Around 43% of properties are owner-occupied , while 25% are privately rented and 33% 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 65 to 77 — a 12-point jump that would lift the typical rating to C. If you live in SE27 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.