Only one of the 20 projects longlisted for the RIBA House of the Year 2021 achieved an A-rated energy performance certificate according to research by British studio Hawkes Architecture.
The research revealed that nine of 20 longlisted projects received a B-rated energy performance certificate (EPC), while the remaining projects were C, D and E-rated.
An EPC is a measure of the overall efficiency of a home, for which the best rating is A and the worst is E. Hawkes Architecture used the latest available EPC data available for the projects to conduct the research.
Findings described as "profound"
The only longlisted project to receive an A-rated EPC was the Devon Passivhaus, a low-lying brick home in Devon by McLean Quinlan that performs to the highly energy-efficient Passivhaus standard. Four of the longlisted projects, Grain House by Hayhurst & Co Architects, Kyle House by GRAS, Simple House by Haysom Ward Miller Architects and The Old School by ArkleBoyce Architects did not have publicly accessible EPC data.
Hawkes Architecture has revealed the EPC ratings of the RIBA House of the Year 2021
"The findings arising from the research have been more profound than even we thought," said the studio's founder ??Richard Hawkes.
"My hope is that it might help shift the focus onto sustainability in a more meaningful and substantial way than has been the case thus far," he told Dezeen.
RIBA House of the Year 2021 is an annual award bestowed by the Ro...