Gwynedd EPC ratings

Over the last 4 quarters, 3,684 domestic Energy Performance Certificates were lodged in Gwynedd. 44.3% were rated C or better, 20.2 points below the England and Wales average of 64.5%. That puts Gwynedd at 317 of 320 local authorities. The most common recent band is C. These figures cover certificates lodged when homes were built, sold or let, so they lean towards housing that recently changed hands rather than the whole stock.

44.3%rated C or better, last 4 quarters

317of 320 local authorities

58,824certificates since 2008

94.6 m²average floor area per certificate

Band distribution

Last 4 quarters

A 6.0%B 7.3%C 31.0%D 30.3%E 17.3%F 5.3%G 2.8%

All certificates since 2008

A 1.2%B 4.7%C 20.2%D 30.9%E 22.2%F 13.7%G 7.0%

Certificates lodged by quarter

Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026

Similar-ranked areas

Erewash (48.1%) · Carmarthenshire (46.2%) · North Norfolk (45.3%) · Westmorland and Furness (41.9%) · Tandridge (38.7%) · Isles of Scilly (4.9%)

Want the certificate for a specific address in Gwynedd? Use the official lookup: find an energy certificate on gov.uk. If your home is rated D or below, start with how to improve your EPC rating.

Source: MHCLG, Live tables on Energy Performance of Buildings Certificates, Table D1 (by local authority), published under the Open Government Licence v3.0. Data covers domestic certificates lodged up to 2026 Q2. Retrieved and last checked on 2026-09-06. Read more on how we handle the data.