Back to Top

Central Statistics Office

Search currently unavailable

 Skip navigation

CSO statistical release, , 11am

Domestic Building Energy Ratings

Quarter 4 2018

Table A: BER Ratings by Period of Construction
% of row
Period of constructionEnergy rating 
ABCDEF-GTotal
1700-19770418252033245,143
1978-1999054036136233,323
2000-200409602262145,725
2005-2009135511031138,375
2010-20143655710010,793
2015-2018973000029,214

97% of Dwellings built in 2015-2018 were given an "A" rating

Figure 1: BER Ratings by Period of Construction
go to full release

Dwellings built in 2015-2018 were considerably more energy efficient than in earlier periods with 97% 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 2018 compared with 2017 (see Table 1).

Dublin County had the highest combined “A” and “B” rating at 27% (see Table 4). 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 41% (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 28% 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 27,304 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 37% 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 58 square metres for basement dwellings.