Postcode district
EPC ratings in LL40
LL40 in Gwynedd has 1,445 properties with EPC certificates. The average rating is D, matching the Gwynedd average. Browse sectors below or search for a specific address to view detailed property data. The area is predominantly house (69%). The most frequently recommended improvement is solar photovoltaic panels, 2.5 kwp.
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Percentage of properties in each EPC band across LL40.
Property type mix
Distribution of property types (houses, flats, bungalows) within LL40.
In LL40, the most common EPC-rated properties are house (around 69%) and bungalow (around 15%). 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
Solar photovoltaic panels, 2.5 kWp
1427 occurrences
- 2
Solar water heating
1317 occurrences
- 3
Internal or external wall insulation
799 occurrences
- 4
Low energy lighting for all fixed outlets
769 occurrences
- 5
Floor insulation (solid floor)
699 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 LL40, Gwynedd.
Summary
In postcode district LL40 (Gwynedd), 25.7% of homes with an EPC are rated band C or above, based on the latest certificate for 1,445 homes on the official register (statistics updated June 2026). That is 22.0 percentage points below the England and Wales figure of 47.7%.
Citation
EPC Advisor (2026). EPC ratings in LL40, Gwynedd. Statistics updated June 2026. Analysis of the MHCLG Get Energy Performance Data register (Open Government Licence v3.0). https://epcadvisor.co.uk/browse/gwynedd/LL40
- Band C or above:
- a current rating of A, B or C.
- Homes counted:
- 1,445
- 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