Energy efficiency in SE13 (Lewisham) sits at an average score of 70 out of 100, placing it around the national average. To put this in context, the national average sits at 67. The most common rating band is C, with 23.0% of homes rated A or B and 68.2% in the C or D bands. Meanwhile, 1.1% of homes sit in the F or G bands — the least efficient categories. In practical terms, a C rating suggests reasonably efficient homes, though there is still room for improvement on heating and insulation.

Most of the housing stock here consists of flats. Flats alone account for 70% of all certificated properties — a distinctly urban profile. Around 44% of properties are owner-occupied , while 30% are privately rented and 26% are social housing. Gas central heating is the main fuel source for 73% 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 70 to 79 — a 9-point jump that would lift the typical rating to C. If you live in SE13 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.