Welsh Housing Conditions Survey (energy efficiency of dwellings): April 2017 to March 2018

This report provides statistics on Energy Performance Certificate (EPC) and Environmental Impact (EI) ratings. It also includes:

• details of energy saving measures installed in dwellings and breakdowns of construction types
• the number of dwellings making use of renewable energy
• heating systems, main fuel type and type of boilers used
• comparisons between tenures, dwelling types and urban/rural areas
• comparisons with other UK nations and changes over time.

Main points

• Homes in Wales have become significantly more energy efficient over the last decade, with social housing having the highest percentage of dwellings in EPC bands C or above.
• Flats were more energy efficient than houses; 55% of flats had an EPC band C and above compared with 25% of houses.
• Dwellings in rural areas tend to be less energy efficient than dwellings in urban areas.
• 7% of dwellings in Wales used at least one type of renewable energy in 2017-18 compared with less than 1% in 2008.
• 65% of dwellings in Wales are constructed of cavity masonry and 26% are constructed of solid masonry.
• Most dwellings in Wales (82%) used gas to heat their homes.
• Condensing-combi boilers were the most common boiler type (66%).