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CSO statistical release, , 11am

Domestic Building Energy Ratings

Quarter 3 2018

Table A: BER Ratings by Period of Construction
% of row
Period of constructionEnergy rating 
ABCDEF-GTotal
1700-19770418252033240,652
1978-1999054036136229,977
2000-200409602372143,009
2005-2009135511031136,216
2010-20143655710010,734
2015-2018963000025,072

96% of Dwellings built in 2015-2018 were given an "A" rating

Figure 1: BER Ratings by Period of Construction
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Dwellings built in 2015-2018 were considerably more energy efficient than in earlier periods with 96% given an “A” rating compared with 36% in 2010-2014 and 1% in 2005-2009 (see Table A and Figure 1).

There was a decrease of 2.5% in the number of dwellings receiving a BER audit in the first three quarters of 2018 compared with the same period in 2017 (see Table 1).

Dublin County had the highest combined “A” and “B” rating at 25% (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 much lower at 27% than in Dublin 18. The highest proportion of combined “F” and “G” rating was 27% for Dublin 7.

Mains gas was the main space heating fuel used in 57% of the 23,465 dwellings completed during 2015-2018 and with a Building Energy Rating (BER) audit. This was a substantial increase from 2000-2004 when 40% of dwellings with a BER audit used mains gas. There were contrasting trends for heating oil and electricity with 36% of 2000-2004 built dwellings using heating oil compared with 6% for dwellings built in 2015-2018. In contrast usage of electricity increased from 19% in 2000-2004 to 36% in 2015-2018 (see Table 9).

The average floor area of all dwellings with a BER audit was 111 square metres (see Table 11). This average size varied from 156 square metres for detached houses to 59 square metres for basement dwellings.