Cornwall home energy efficiency

June 2023

Residential buildings are energetically very inefficient. The average home energy rating in Cornwall county is 59.7, D rating. This is by 5.4 worse score than the average home energy rating in England and Wales. The average potential rating is 78.3, C rating.

Cornwall homes by energy rating

Energy rating	Cornwall	England & Wales
█ A	0.3%	0.1%
█ B	11.4%	11.5%
█ C	43.5%	57.6%
█ D	11.9%	12.9%
█ E	20.0%	14.0%
█ F	9.4%	3.0%
█ G	3.6%	0.8%

Cornwall homes by potential energy rating

Potential energy rating	Cornwall	England & Wales
█ A	7.8%	3.9%
█ B	42.4%	47.2%
█ C	38.7%	44.4%
█ D	2.9%	1.8%
█ E	3.7%	1.6%
█ F	1.4%	0.4%
█ G	3.2%	0.7%

Cornwall homes by main heating control energy efficiency

Main heating control	Cornwall	England & Wales
█ very poor	3.2%	5.2%
█ poor	17.2%	8.9%
█ average	23.0%	27.5%
█ good	46.0%	52.5%
█ very good	10.7%	5.9%

Cornwall homes by main heating energy efficiency

Main heat efficiency	Cornwall	England & Wales
█ very poor	11.2%	6.0%
█ poor	9.8%	3.2%
█ average	27.5%	10.1%
█ good	46.9%	76.2%
█ very good	4.5%	4.6%

Cornwall homes by walls energy efficiency

Walls efficiency	Cornwall	England & Wales
█ very poor	23.5%	23.5%
█ poor	11.8%	15.9%
█ average	9.6%	10.8%
█ good	40.7%	39.0%
█ very good	14.4%	10.9%

Cornwall homes by windows energy efficiency

Windows efficiency	Cornwall	England & Wales
█ very poor	6.8%	5.9%
█ poor	4.6%	3.8%
█ average	44.2%	51.1%
█ good	32.3%	29.4%
█ very good	12.1%	9.8%

Cornwall homes by hot water heating energy efficiency

Hot water heating energy efficiency	Cornwall	England & Wales
█ very poor	18.9%	7.4%
█ poor	13.0%	6.6%
█ average	22.9%	13.6%
█ good	40.8%	66.3%
█ very good	4.4%	6.0%

Cornwall homes by lighting energy efficiency

Lightning energy efficiency	Cornwall	England & Wales
█ very poor	10.1%	12.6%
█ poor	7.3%	8.0%
█ average	12.6%	13.8%
█ good	15.5%	16.2%
█ very good	54.5%	49.4%