When it comes to energy performance, W1W in Westminster manages an average of 70 out of 100, placing it around the national average. Compared to the national average of 67, that puts W1W around the norm for England and Wales. The most common rating band is C, with 16.7% of homes rated A or B and 74.8% 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.

The area is characterised by flats. Flats alone account for 94% of all certificated properties — a distinctly urban profile. Around 33% of properties are owner-occupied , while 49% are privately rented and 18% are social housing. That high proportion of rental homes matters — landlords in W1W must comply with the Minimum Energy Efficiency Standards (MEES), which currently require at least an EPC E rating. Properties rated F or G cannot legally be let. Gas central heating is the main fuel source for 71% 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 78 — a 8-point jump that would lift the typical rating to C. If you live in W1W 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.