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Local authority data · Wales

Commercial EPC & MEES data for Gwynedd

84.5% of commercial property in Gwynedd sits below EPC B. Analysis of 2,439 unique commercial properties on the Energy Performance of Buildings Register.

84.5%
of commercial stock below EPC B
145
over 1,000 m² and below B – the 2031 cohort
189
rated F or G – unlettable without an exemption
9 / 319
national rank by share below EPC B

The position in Gwynedd

There are 2,439 unique commercial properties in Gwynedd with a certificate on the Energy Performance of Buildings Register. Of those, 2,062 – 84.5% – are rated below EPC B, which is 8.4 percentage points worse than the England and Wales average of 76.1%.

The largest category locally is retail & financial services, and the postal towns and districts most represented are Bangor, Caernarfon, Pwllheli, Porthmadog, Tywyn. Average floor area is 450 m² and the average asset rating is 82.

668 certificates in the district have expired (27.4% of the total), of which 110 were rated F or G when issued – the least comfortable position on the register, and the one owners are least likely to know about.

Key figures

Properties analysed2,439
Below EPC B2,062 (84.5%)
Below EPC E – unlettable189 (7.7%)
Over 1,000 m² and below B145
Expired certificates668 (27.4%)
Expired and below E110
Average floor area450 m²
Average asset rating82
National rank9 of 319

Band distribution

Commercial EPC band distribution – Gwynedd
BandPropertiesShareShare, shown as a barvs England & Wales
A+30.1%
-0.2
A622.5%
-1.6
B31212.8%
-6.7
C85335.0%
+1.8
D66427.2%
+1.5
E35614.6%
+1.7
F763.1%
+1.2
G1134.6%
+2.1

Commercial stock by sector

Commercial stock by sector
SectorPropertiesShareShare, shown as a bar
Retail & financial services92638.0%
Offices & workshops45418.6%
Restaurants, cafes & pubs37215.3%
Hotels1787.3%
Storage & distribution873.6%
Education793.2%
General & special industrial783.2%
Hospitals & care homes542.2%

Floor area – who the 2031 standard catches

The 2031 EPC B standard is expected to apply only to buildings over 1,000 m². In Gwynedd that line falls here:

Floor area distribution – the 1,000 m² line decides who is caught by the 2031 standard
Floor areaPropertiesShareShare, shown as a bar
Under 250 m²1,43258.7%
250–500 m²50220.6%
500–1,000 m²27111.1%
1,000–2,500 m²1707.0%
2,500–10,000 m²602.5%
Over 10,000 m²40.2%

Find your building in Gwynedd

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For editors and journalists

Quote – attributable to evenEco

Analysis of the Energy Performance of Buildings Register by evenEco shows that 84.5% of commercial property in Gwynedd is rated below EPC B – the standard expected to apply to buildings over 1,000 m² from 2031. 145 buildings in the district are both over 1,000 m² and below that standard, and 189 are rated F or G, which has been below the legal minimum for letting since April 2023. Gwynedd ranks 9 of 319 local authorities in England and Wales.

Please attribute to evenEco and link to evenhub.uk/commercial/areas/gwynedd/. Figures derived from the GOV.UK Energy Performance of Buildings Register, deduplicated to the most recent certificate per property. Media enquiries: contact us.

Shareable summary – Gwynedd

Commercial EPC summary – Gwynedd, September 2026
MeasureFigure
Commercial properties analysed2,439
Below EPC B2,062 (84.5%)
Below EPC E – unlettable without exemption189 (7.7%)
Over 1,000 m² and below EPC B145
Expired certificates668 (27.4%)
Average floor area450 m²
National rank (share below EPC B)9 of 319

Common questions

How many commercial properties in Gwynedd are below EPC B?

2,062 of 2,439 – 84.5% of the commercial stock on the register. That is 8.4 percentage points worse than the England and Wales average of 76.1%.

How many buildings in Gwynedd are caught by the 2031 EPC B standard?

145 commercial buildings in Gwynedd are over 1,000 m² and currently rated below EPC B, which is the cohort the 2031 standard is aimed at.

How many commercial buildings in Gwynedd are already unlettable?

189 are rated F or G. Letting those without a registered exemption has been unlawful since 1 April 2023. A further 110 have an expired certificate that was rated F or G.

Where does Gwynedd rank nationally?

9 of 319 local authorities, ranked by the share of commercial stock below EPC B, with rank 1 being the highest share.

Local authorities with a similar profile

All 319 local authorities →

Source: GOV.UK Energy Performance of Buildings Register, deduplicated by evenEco to the most recent certificate per propertyAnalysis updated 11 September 2026 Methodology