EPC Ratings in Gwynedd
D
Avg Rating
56
Avg Score
38,638
Total Certs
17.1%
F/G Rated
67
National Avg
Gwynedd is below average for energy efficiency — most homes here have room to improve.
Average score: 56 vs national average of 67. 17.1% of homes are rated F or G — above the national average of 2.9%.
Best-Performing Districts
Worst-Performing Districts
All Postcode Districts
| Code | Area | Avg Rating | Avg Score | % F/G | Certificates |
|---|---|---|---|---|---|
| LL57 | LL57 | D | 63 | 7% | 7,926 |
| LL56 | LL56 | D | 63 | 7.2% | 881 |
| LL55 | LL55 | D | 58 | 13.7% | 6,648 |
| LL42 | LL42 | D | 58 | 12.9% | 979 |
| LL36 | LL36 | D | 57 | 16.4% | 1,767 |
| LL52 | LL52 | D | 57 | 14.4% | 942 |
| LL49 | LL49 | D | 57 | 14% | 1,584 |
| LL48 | LL48 | D | 55 | 18.6% | 748 |
| LL23 | LL23 | E | 54 | 20.5% | 1,212 |
| LL35 | LL35 | E | 54 | 17.5% | 589 |
| LL40 | LL40 | E | 53 | 21.8% | 1,423 |
| LL41 | LL41 | E | 53 | 19.7% | 2,094 |
| LL53 | LL53 | E | 51 | 25% | 5,890 |
| LL54 | LL54 | E | 51 | 24% | 3,454 |
| LL46 | LL46 | E | 49 | 24.8% | 737 |
| LL43 | LL43 | E | 46 | 25.6% | 156 |
| LL37 | LL37 | E | 46 | 35.1% | 211 |
| LL45 | LL45 | E | 45 | 34.6% | 217 |
| LL44 | LL44 | E | 45 | 36.2% | 365 |
| LL51 | LL51 | E | 45 | 35.9% | 220 |
| LL38 | LL38 | E | 45 | 31% | 313 |
| LL47 | LL47 | E | 42 | 34.5% | 206 |
| LL39 | LL39 | F | 38 | 50% | 76 |