Heat pumps present in 84% of post-2020 builds
The highest rating category of A0 was received by 3,006 dwellings since it was introduced on 24 May 2026, CSO data shows.
All dwellings with A0 ratings used electricity as the main space heating fuel due to the requirement of zero emissions from fossil fuels.
The most common main space heating fuel among BER rated dwellings was:
- Mains gas (34%),
- Heating oil (34%) and
- Electricity (26%).
Over one-third (36%) of dwellings with a BER received an A0, A, or B rating in Q2.
Photovoltaic
Solar energy installations, either thermal or photovoltaic, were present in 16% of rated dwellings at the time of assessment.
Statistician Kevin Hunt said “Of the 1.37 million unique dwellings receiving a BER rating since 2009, 18% were rated A0 or A, 18% were rated B, and 31% were rated C.
“Energy from solar electric panels or solar thermal collectors was present in 16% of rated dwellings.
“This proportion was highest in detached houses (26%) and lowest in apartments (5%).”
A heat pump was present in 15% of rated dwellings where the main space heating fuel was identified.
This proportion was highest in newer builds, with heat pumps present in 84% of dwellings built since 2020.
More than 99% of audited dwellings built since 2020 received a rating of A or A0, the CSO data shows.
A or A0 ratings were received by 93% of dwellings built from 2015-2019, 39% of those built from 2010 to 2014 and 6% built between 2005 and 2009.