Data from 8,283 property assessments shows B15 averaging 73 out of 100, placing it above the national average. For reference, the England and Wales average is 67 — so B15 is above that benchmark. The most common rating band is C, with 28.6% of homes rated A or B and 63.9% in the C or D bands. Meanwhile, 1.5% 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.

Walk through B15 and you will mostly see flats. Flats alone account for 74% of all certificated properties — a distinctly urban profile. Around 41% of properties are owner-occupied , while 34% are privately rented and 25% are social housing. Gas central heating is the main fuel source for 60% 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 73 to 79 — a 6-point jump that would lift the typical rating to C. If you live in B15 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.