New data shows that Leitrim has the lowest amount of A-rated homes nationwide.
More than 80 per cent of homes built since 2020 are heated using electricity.
The figures from the CSO also show the highest proportion of A-rated homes are in Kildare, county Dublin and Meath.
84 percent of homes built in the last two years use electricity for heating.
That compares to just 19 percent which were built between the year 2000 and 2004.
The CSO say that no home with a BER constructed since 2020 installed an oil boiler for the house – that compares with more than a third built 20 years ago.
The SEAI says a “BER makes the energy performance of a home visible to prospective buyers and tenants allowing them to take energy performance into consideration in their purchase or rental decision.”
The lowest proportion of A-rated homes are in Leitrim – just 2 percent have the highest possible rating from the Sustainable Energy Authority, while the highest are in the east – Kildare, county Dublin and Meath.
Just one percent of apartments nationally had the highest marks possible, while 43 percent were given a BER of D or less.
