Postcode district
EPC ratings in LL42
LL42 in Gwynedd has 985 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 (48%). The most frequently recommended improvement is internal or external wall insulation.
Use these statistics: copy a summary, citation, chart or CSVEPC distribution
Percentage of properties in each EPC band across LL42.
Property type mix
Distribution of property types (houses, flats, bungalows) within LL42.
In LL42, the most common EPC-rated properties are house (around 48%) and flat (around 38%). 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
681 occurrences
- 2
Solar photovoltaic panels, 2.5 kWp
642 occurrences
- 3
Low energy lighting for all fixed outlets
543 occurrences
- 4
Solar water heating
456 occurrences
- 5
Floor insulation (solid floor)
344 occurrences
Sector breakdown
1 postcode sectors in LL42.
Check a specific property
Enter your postcode to view an EPC report
Pick your address to see live EPC data and improvement recommendations.
Check first. Book only if needed.
Book an EPC assessment in Gwynedd (LL42)
Check whether your property already has a valid EPC, then arrange an accredited domestic assessment only if you need one.
For journalists, researchers and local groups
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 LL42, Gwynedd.
Summary
In postcode district LL42 (Gwynedd), 28.7% of homes with an EPC are rated band C or above, based on the latest certificate for 985 homes on the official register (statistics updated June 2026). That is 19.0 percentage points below the England and Wales figure of 47.7%.
Citation
EPC Advisor (2026). EPC ratings in LL42, 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/LL42
- Band C or above:
- a current rating of A, B or C.
- Homes counted:
- 985
- 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