When it comes to energy performance, SW9 in Lambeth manages an average of 71 out of 100, placing it around the national average. Compared to the national average of 67, that puts SW9 around the norm for England and Wales. The most common rating band is C, with 18.5% of homes rated A or B and 74.8% in the C or D bands. Meanwhile, 0.7% 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.

The area is characterised by flats. Flats alone account for 72% of all certificated properties — a distinctly urban profile. Around 28% of properties are owner-occupied , while 29% are privately rented and 42% are social housing. Gas central heating is the main fuel source for 81% 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 71 to 78 — a 7-point jump that would lift the typical rating to C. If you live in SW9 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.