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CSO statistical release, 18 April 2018, 11am

Domestic Building Energy Ratings

Quarter 1 2018

Table A: BER Ratings by Period of Construction
% of row
Period of constructionEnergy rating 
ABCDEF-GTotal
1700-19770418252033229,544
1978-1999054036136222,206
2000-200409592372136,384
2005-2009135501031131,397
2010-20143755610010,598
2015-2018964000019,130

Almost 20,000 Domestic Building Energy Rating audits conducted from January to March 2018

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There were 18,594 domestic Building Energy Rating (BER) audits conducted from January to March 2018 which was a decrease of 8% on the first quarter of 2017 (see Table 1). The dwellings built in 2015-2018 were considerably more energy efficient than in previous periods with 96% given an “A” rating (see Table A and Figure 1).

Dublin County had the highest combined “A” and “B” rating, at 24% (see Table 4). Offaly and Roscommon had the lowest proportion of combined “A” and “B” rating at 7%.

Dublin 18, with an average dwelling age of 17 years, had the highest proportion of combined “A” and “B” rating at 40% (see Table 5). The average age of dwellings in Dublin 15 that have had a BER audit done was also 17 years, but the combined "A" and "B" rating was only 25%. The highest proportion of combined “F” and “G” rating was 27% for Dublin 7.

Heating Oil (39%) and Mains Gas (39%) were the main heating fuels used (see Table 9). Electricity was next at 15%, Solid Fuel at 5% and Liquid Petroleum Gas (LPG) at 2%. 39% of dwellings using Wood Pellets & Chips as their main heating system had an "A" or "B" rating (see Table 6).

The period of construction with the highest proportion of dwellings with Mains Gas was 2015-2018 with a rate of 58%. The same period was the highest for dwellings using Electricity as their main space heating fuel (35%). In contrast, 52% of dwellings constructed in 1978-1982 that have had a BER audit used Heating Oil as their main heating fuel (see Table 9).