"Figure 2:  Flats and maisonettes were the most energy-efficient property type for all dwellings in both England and Wales","" "Median energy efficiency score by property type, England and Wales, up to March 2022","" "","" "Notes","" "Unit","Median energy efficiency score" "","" "Country or region name","Wales","England" "Flats and maisonettes","73","72" "Semi-detached","65","64" "Terraced","63","65" "Detached","63","65"