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CSO statistical release, , 11am

Domestic Building Energy Ratings

Quarter 2 2021

Table A: Number of Domestic BER certificates 
Period20172018201920202021% change 2021/2020
Quarter 223,00523,03823,14810,24022,336118%

118% increase in Domestic BER audits in April-June 2021

Figure 1: Number of Domestic BER Certificates published in 2019-2021
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There were 22,336 Building Energy Rating (BER) audits reported in quarter two 2021 compared with 10,240 in quarter two 2020 (see Table A, Table 1 and Figure 1). This is an increase of 118% (see Information Note). April 2021 was 223% higher than April 2020. May 2021 was a similar 226% above May 2020. There was an increase in June 2021 when the number of completed BER audits was 36% above the number in June 2020. In the period 2009 to June 2021 just over 1.1 million BER audits have been undertaken (see Table 1).

Dwellings built in 2015-2021 were considerably more energy efficient than those built in earlier periods with 97% given an “A” rating compared with 34% in 2010-2014 and 1% in 2005-2009 (see Table 2 and Figure 4).

Dublin County had the highest combined “A” and “B” rating at 32% (see Table 4). Roscommon had the lowest proportion of combined “A” and “B” rating at 10%.

Dublin 18, with an average dwelling age of 18 years, had the highest proportion of combined “A” and “B” rating at 45% (see Table 5). The average age of dwellings in Dublin 15 that have had a BER audit done was 17 years, but the combined "A" and "B" rating was much lower at 32% than in Dublin 18. The highest proportion of combined “F” and “G” rating was 25% for Dublin 7.

Electricity was the main space heating fuel used in 52% of the dwellings completed during 2015-2021 and with a BER audit. This was an increase from 2000-2004 when 19% of dwellings with a BER audit used electricity. There was a contrasting trend for heating oil with 35% of 2000-2004 built dwellings using heating oil compared with 4% for dwellings built in 2015-2021 (see Table 9).

The average floor area of all dwellings with a BER audit was 112 square metres (see Table 11). This average size varied from 159 square metres for detached houses to 60 square metres for basement dwellings.

Table 14 examines dwellings that have had more than one BER audit carried out. In their earliest assessment only 8% of dwellings received either an “A” or “B” rating compared with 24% in their most recent assessment. In contrast, 18% of dwellings were rated “F” or "G" in their first BER assessment compared with only 4% in their latest BER assessment (see Table 14 and Figure 2).