What is the typical EPC rating in Gwynedd?

The median domestic EPC band in Gwynedd is D (SAP 55-68). The single most common band is D at 31.0% of rated certificates. Based on 57,789 EPCs lodged cumulatively to 2026-03-31 (MHCLG EPB live tables, Table D1).

How many homes in Gwynedd are rated EPC C or better?

25.7% of rated domestic EPCs in Gwynedd are band C or better (A+B+C), the threshold the UK government uses for its "EPC C by 2035" ambition. That compares with 44.9% across England. 43.3% are rated E or worse (E, F or G).

What does each EPC band mean?

EPC bands run A to G by SAP energy-efficiency score: A = 92-100, B = 81-91, C = 69-80, D = 55-68, E = 39-54, F = 21-38, G = 1-20. A is the most energy-efficient (lowest running costs and carbon); G is the least. Privately rented homes in England and Wales must currently be at least band E to be let lawfully.

Where does this EPC data for Gwynedd come from?

From the Ministry of Housing, Communities & Local Government (MHCLG) "Live tables on Energy Performance of Buildings Certificates", Table D1 (domestic properties by energy efficiency rating), cumulative to 2026-03-31. These are counts of certificates lodged on the EPB Register, not unique dwellings — a home re-sold or re-let since 2008 can hold several EPCs. Open Government Licence v3.0, (c) Crown copyright.

EPC energy-efficiency ratings in Gwynedd

local authority · ONS code W06000002

How energy-efficient are homes in Gwynedd by EPC rating?

Across 57,789 domestic Energy Performance Certificates lodged in Gwynedd (cumulative to 2026-03-31), 25.7% are rated EPC C or better (rank 347 of 348 local authorities by share rated C or better) and 43.3% are rated E or worse. The median domestic EPC band is D (SAP 55-68). Source: MHCLG EPB live tables (Table D1), Open Government Licence v3.0.

Official statistics · MHCLG EPB live tables (Table D1)·As of 2026-03-31 · updated quarterly (each new MHCLG EPB release) (last: 2026-03-31)

25.7%C or better

Homes rated EPC C or better — Gwynedd

Rank 347 of 348 local authorities · 19.2 points below the England average of 44.9%

Median band D (SAP 55-68)

EPC band distribution — Gwynedd

Domestic EPC band distribution for Gwynedd
Band	SAP	Share	Certificates
A	92-100	1.2%	670
B	81-91	4.6%	2,670
C	69-80	19.9%	11,524
Dmedian	55-68	31.0%	17,907
E	39-54	22.4%	12,919
F	21-38	13.8%	7,982
G	1-20	7.1%	4,117
Total rated certificates			57,789

Percentages are of rated (A-G) certificates; “Not Recorded” certificates (0) are excluded from the percentage denominator. Counts are of certificates lodged, not unique dwellings. Source: MHCLG EPB live tables (Table D1), cumulative to 2026-03-31.

Key figures — Gwynedd

Key EPC figures for Gwynedd
Metric	Value	Source
Median EPC band	D	MHCLG (derived from counts)
Rated EPC C or better (A+B+C)	25.7%	GeraRent (from band %)
Rated EPC E or worse (E+F+G)	43.3%	GeraRent (from band %)
Total domestic EPCs lodged	57,789	MHCLG EPB live tables
National rank (C or better)	347 of 348	GeraRent (ranking)

EPC running-cost comparison

Model the indicative running-cost gap between EPC bands for a Gwynedd home, and save areas to compare side by side.

Pick two EPC bands to see the indicative annual running-cost gap for a mid-size home, and save areas to your personal comparison list. Cost figures are illustrative, derived from SAP band running-cost ranges — not a bill estimate.

From bandTo band

−£420/yr

Indicative running-cost saving moving an EPC band D home to band C

Gwynedd EPC ratings — questions and answers

What is the typical EPC rating in Gwynedd?: The median domestic EPC band in Gwynedd is D (SAP 55-68). The single most common band is D at 31.0% of rated certificates. Based on 57,789 EPCs lodged cumulatively to 2026-03-31 (MHCLG EPB live tables, Table D1).
How many homes in Gwynedd are rated EPC C or better?: 25.7% of rated domestic EPCs in Gwynedd are band C or better (A+B+C), the threshold the UK government uses for its "EPC C by 2035" ambition. That compares with 44.9% across England. 43.3% are rated E or worse (E, F or G).
What does each EPC band mean?: EPC bands run A to G by SAP energy-efficiency score: A = 92-100, B = 81-91, C = 69-80, D = 55-68, E = 39-54, F = 21-38, G = 1-20. A is the most energy-efficient (lowest running costs and carbon); G is the least. Privately rented homes in England and Wales must currently be at least band E to be let lawfully.
Where does this EPC data for Gwynedd come from?: From the Ministry of Housing, Communities & Local Government (MHCLG) "Live tables on Energy Performance of Buildings Certificates", Table D1 (domestic properties by energy efficiency rating), cumulative to 2026-03-31. These are counts of certificates lodged on the EPB Register, not unique dwellings — a home re-sold or re-let since 2008 can hold several EPCs. Open Government Licence v3.0, (c) Crown copyright.

Local authorities with similar EPC profiles

See the full EPC energy-efficiency ranking by area, or explore council tax by area and house prices by area.

Find energy-efficient rentals in Gwynedd

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Source: Energy Performance of Buildings Certificates — Live tables (Table D1, Domestic properties by energy efficiency rating), Ministry of Housing, Communities & Local Government (MHCLG). Contains public sector information licensed under the Open Government Licence v3.0. (c) Crown copyright. Open Government Licence v3.0. Cumulative to 2026-03-31 (Cumulative, all domestic EPCs lodged Q4 2008 to 2026 Q1 (to 31 March 2026)). Figures are counts of certificates lodged, not unique dwellings; a home re-sold or re-let since 2008 can hold several EPCs. The “share rated C or better” and the national ranking are derived by GeraRent from the official band percentages.