EPC.Report
E
LL54 Dwyfor Meirionnydd
Gwynedd Rating E Score: 51 / 100

LL54 is below average for energy efficiency — most homes here have room to improve.

24% of homes are rated F or G — above the national average of 2.9%.

For the 3,454 homes assessed in LL54, the average energy score comes in at 51 out of 100, placing it below the national average. The national average is 67, which means LL54 performs below most areas. The most common rating band is D, with 4.7% of homes rated A or B and 45.9% in the C or D bands. Meanwhile, 24% of homes sit in the F or G bands — the least efficient categories. In practical terms, a rating of D means many homes here lose more heat than average — potentially adding £200-400 per year to energy bills compared to a C-rated home.

Houses make up the bulk of the housing in this district. Around 69% of properties are owner-occupied and 20% are social housing.

There is genuine room for improvement here. If every recommended upgrade were carried out, the average score could climb from 51 to 79 — a 28-point jump that would lift the typical rating to C. That is a substantial gain, suggesting many homes are missing basic efficiency measures. If you live in LL54 and want to reduce your energy bills, start with our guide to loft insulation — it is one of the most cost-effective upgrades you can make.

EPC Rating Distribution

A
33 (1.0%)
B
130 (3.8%)
C
540 (15.6%)
D
1,045 (30.3%)
E
878 (25.4%)
F
533 (15.4%)
G
295 (8.5%)

Energy Efficiency Score

51
LL54 avg
67
National avg
-16 points vs national average

Potential score if all improvements made: 79 (rating C)

Recommended Improvements

Government funding may be available for some of these improvements. Check grants →

More data — property types, tenure & fuel

Property Types

2,648
House
692
Bungalow
102
Flat
1
Park home
11
Maisonette

Tenure

2,260
Owner-occupied
365
Private rented
658
Social rented

Main Fuel Types

1,538
gas
689
electric
903
oil
324
other

Frequently asked questions

What is the average EPC rating in LL54?

Homes in LL54 have an average EPC rating of E, scoring 51 out of 100 for energy efficiency. That figure comes from 3,454 certificates issued across the district.

That is below the national average of 67, which means there is real scope to improve energy efficiency here. An E rating suggests many homes here are losing significant amounts of heat — and money — through poor insulation or outdated heating systems.

What percentage of homes in LL54 are rated F or G?

24% of homes in LL54 fall into the F or G bands — the lowest energy efficiency ratings. Nationally, the figure is 2.9%.

That means LL54 has a higher-than-average proportion of poorly insulated homes. On the positive side, many of these properties may qualify for free improvements through government schemes like ECO4 or the Great British Insulation Scheme. Landlords should note that F and G rated properties cannot legally be rented out under current MEES rules.

See all EPC data for Gwynedd →