Cornwall house energy efficiency

June 2023

Houses are energetically very inefficient. The average house energy rating in Cornwall county is 58.1, D rating. This is by 4.8 worse score than the average house energy rating in England and Wales. The average potential rating is 79.2, C rating.

Cornwall houses by energy rating

Energy rating	Cornwall	England & Wales
█ A	0.4%	0.2%
█ B	9.9%	8.6%
█ C	41.0%	54.9%
█ D	12.9%	15.3%
█ E	21.4%	16.5%
█ F	10.5%	3.7%
█ G	3.9%	1.0%

Cornwall houses by potential energy rating

Potential energy rating	Cornwall	England & Wales
█ A	9.7%	5.8%
█ B	46.7%	57.4%
█ C	31.6%	32.2%
█ D	2.9%	1.6%
█ E	3.8%	1.5%
█ F	1.5%	0.4%
█ G	3.9%	1.1%

Cornwall houses by main heating control energy efficiency

Main heating control	Cornwall	England & Wales
█ very poor	3.2%	5.2%
█ poor	15.5%	5.6%
█ average	23.9%	28.7%
█ good	46.0%	53.3%
█ very good	11.4%	7.2%

Cornwall houses by main heating energy efficiency

Main heat efficiency	Cornwall	England & Wales
█ very poor	9.7%	1.8%
█ poor	10.0%	2.4%
█ average	28.7%	9.0%
█ good	47.4%	83.3%
█ very good	4.3%	3.5%

Cornwall houses by walls energy efficiency

Walls efficiency	Cornwall	England & Wales
█ very poor	24.3%	23.8%
█ poor	12.0%	16.6%
█ average	10.1%	12.3%
█ good	39.6%	38.5%
█ very good	14.0%	8.8%

Cornwall houses by windows energy efficiency

Windows efficiency	Cornwall	England & Wales
█ very poor	6.3%	3.9%
█ poor	4.7%	3.9%
█ average	45.6%	55.8%
█ good	31.4%	28.2%
█ very good	12.1%	8.1%

Cornwall houses by hot water heating energy efficiency

Hot water heating energy efficiency	Cornwall	England & Wales
█ very poor	17.2%	4.0%
█ poor	14.0%	6.6%
█ average	24.3%	13.6%
█ good	40.6%	71.0%
█ very good	3.9%	4.9%

Cornwall houses by lighting energy efficiency

Lightning energy efficiency	Cornwall	England & Wales
█ very poor	10.1%	12.6%
█ poor	7.7%	9.0%
█ average	12.9%	15.1%
█ good	15.8%	17.4%
█ very good	53.5%	45.9%