Postcode district
EPC ratings in SW1Y
SW1Y in Westminster has 479 properties with EPC certificates. The average rating is C, matching the Westminster average. Browse sectors below or search for a specific address to view detailed property data. The area is predominantly flat (91%). The most frequently recommended improvement is internal or external wall insulation.
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Percentage of properties in each EPC band across SW1Y.
Property type mix
Distribution of property types (houses, flats, bungalows) within SW1Y.
In SW1Y, the most common EPC-rated properties are flat (around 91%) and house (around 5%). This mix shapes how easy it is for local homes to improve their EPC ratings.
Top recommendations
Improvements most often recommended in this district.
- 1
Internal or external wall insulation
294 occurrences
- 2
Low energy lighting for all fixed outlets
280 occurrences
- 3
Replace single glazed windows with low-E double glazed windows
194 occurrences
- 4
Draught proofing
113 occurrences
- 5
Heat recovery system for mixer showers
80 occurrences
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Use these statistics
Free to reuse with a link to this page. Figures cover homes with an EPC on the official register, counted by their latest certificate. Homes that have never had an EPC are not included, so the figures describe certified homes, not every home in SW1Y, Westminster.
Summary
In postcode district SW1Y (Westminster), 52.4% of homes with an EPC are rated band C or above, based on the latest certificate for 479 homes on the official register (statistics updated June 2026). That is 4.7 percentage points above the England and Wales figure of 47.7%.
Citation
EPC Advisor (2026). EPC ratings in SW1Y, Westminster. Statistics updated June 2026. Analysis of the MHCLG Get Energy Performance Data register (Open Government Licence v3.0). https://epcadvisor.co.uk/browse/westminster/SW1Y
- Band C or above:
- a current rating of A, B or C.
- Homes counted:
- 479
- Statistics updated:
- June 2026
- Source:
- The MHCLG Get Energy Performance Data register, published under the Open Government Licence v3.0. How we calculate these figures · All EPC data downloads