Gwynedd home energy efficiency comparision

Residential buildings are energetically very inefficient. The average home energy rating in Gwynedd county is 56.6, D rating. This is by 9.4 worse score than the average home energy rating in England and Wales. The average potential rating is 77.5, C rating.

Gwynedd homes by energy rating

Energy rating	Gwynedd	England & Wales
█ A	0.9%	0.2%
█ B	6.0%	11.5%
█ C	43.0%	60.8%
█ D	11.8%	11.8%
█ E	21.4%	12.2%
█ F	11.6%	2.6%
█ G	5.3%	0.8%

Gwynedd map of energy efficiency of properties

Gwynedd homes by potential energy rating

Potential energy rating	Gwynedd	England & Wales
█ A	5.4%	3.6%
█ B	40.3%	47.8%
█ C	39.8%	44.6%
█ D	2.8%	1.5%
█ E	3.5%	1.3%
█ F	1.6%	0.3%
█ G	6.5%	0.7%

Gwynedd homes by main heating control energy efficiency

Main heating control	Gwynedd	England & Wales
█ very poor	3.4%	4.5%
█ poor	14.5%	8.2%
█ average	26.3%	25.3%
█ good	50.6%	56.4%
█ very good	5.2%	5.7%

Gwynedd homes by main heating energy efficiency

Main heat efficiency	Gwynedd	England & Wales
█ very poor	10.4%	6.4%
█ poor	10.5%	3.0%
█ average	27.9%	9.8%
█ good	49.6%	76.7%
█ very good	1.7%	4.0%

Gwynedd homes by walls energy efficiency

Walls efficiency	Gwynedd	England & Wales
█ very poor	31.0%	22.3%
█ poor	16.1%	15.9%
█ average	8.4%	12.9%
█ good	36.2%	38.0%
█ very good	8.4%	10.9%

Gwynedd homes by windows energy efficiency

Windows efficiency	Gwynedd	England & Wales
█ very poor	5.3%	5.4%
█ poor	5.9%	4.7%
█ average	48.5%	50.4%
█ good	34.5%	30.1%
█ very good	5.8%	9.3%

Gwynedd homes by hot water heating energy efficiency

Hot water heating energy efficiency	Gwynedd	England & Wales
█ very poor	17.4%	7.5%
█ poor	14.0%	6.3%
█ average	21.3%	12.9%
█ good	44.1%	68.1%
█ very good	3.1%	5.2%

Gwynedd homes by lighting energy efficiency

Lightning energy efficiency	Gwynedd	England & Wales
█ very poor	8.5%	10.5%
█ poor	6.5%	7.0%
█ average	11.5%	12.0%
█ good	16.1%	15.9%
█ very good	57.4%	54.6%

Gwynedd home energy efficiency

January 2026