SW1A is around the national average for energy efficiency.
3% of homes are rated F or G — above the national average of 2.9%.
Energy efficiency in SW1A (Westminster) 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 24.3% of homes rated A or B and 63.2% in the C or D bands. Meanwhile, 3% 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 92% of all certificated properties — a distinctly urban profile. Around 64% of properties are owner-occupied , while 36% are privately rented . That high proportion of rental homes matters — landlords in SW1A 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.
There is genuine room for improvement here. If every recommended upgrade were carried out, the average score could climb from 70 to 76 — a 6-point jump that would lift the typical rating to C. If you live in SW1A 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.
EPC Rating Distribution
Energy Efficiency Score
Potential score if all improvements made: 76 (rating C)
Recommended Improvements
Government funding may be available for some of these improvements. Check grants →
More data — property types, tenure & fuel
Property Types
Tenure
Main Fuel Types
Frequently asked questions
What is the average EPC rating in SW1A?
Homes in SW1A have an average EPC rating of C, scoring 70 out of 100 for energy efficiency. That figure comes from 400 certificates issued across the district.
This is broadly in line with the national average of 67 — neither particularly efficient nor particularly wasteful.
What percentage of homes in SW1A are rated F or G?
3% of homes in SW1A fall into the F or G bands — the lowest energy efficiency ratings. Nationally, the figure is 2.9%.
That means SW1A has a higher-than-average proportion of poorly insulated homes. On the positive side, many of these properties may qualify for free improvements through government schemes like ECO4 or the Great British Insulation Scheme. Landlords should note that F and G rated properties cannot legally be rented out under current MEES rules.