LAST UPDATE | 21 Jan 2025

THE LOWEST PERCENTAGE of A-rated homes in the country is found in Leitrim, where only 5% of dwellings have the highest level of energy rating.

New figures from the Central Statistics Office show the counties with the highest and lowest number of A-rated homes, as well as the performance of new dwellings built in recent years.

The highest proportions of A-ratings across all dwellings are in Kildare (27%) and Meath (25%), while the lowest was in Leitrim at just 5%.

The highest proportion of G-ratings – the lowest level – was found in Roscommon, where 12% of dwellings have a G energy rating, followed closely by Leitrim at 11% and Tipperary at 10%.

The lowest proportion of G-ratings was in Co Dublin at just 2%, though the figure was higher for homes in Dublin 1 through Dublin 24 at 5%. 

Newer dwellings are being built with better energy efficiency, the CSO figures show. A ratings were awarded to 99% of audited dwellings built between 2020 and 2024.

In comparison, 95% of dwellings built between 2015-2019 receiving an A rating and only 15% of dwellings from all periods.

Electricity is the main space heating fuel for 92% of audited dwellings that were constructed between 2020 and 2024, compared with 24% of all dwellings.

This is the percentage of homes in each county that are A-rated (2009 to 2024):Carlow – 12

• Dublin 1 to 24 – 17
• Co Dublin – 25
• Kildare – 27
• Kilkenny – 13
• Laois – 15
• Longford – 7
• Louth – 17
• Meath – 25
• Offaly – 12
• Westmeath – 10
• Wexford – 13
• Wicklow – 23
• Clare – 9
• Cork City – 5
• Cork County – 16
• Kerry – 10
• Limerick City – 9
• Limerick County – 11
• Tipperary – 7
• Waterford City – 10
• Waterford County – 15
• Galway City – 11
• Galway County – 12
• Leitrim – 5
• Mayo – 9
• Roscommon – 7
• Sligo – 9
• Cavan – 7
• Donegal – 9
• Monaghan – 13