Back to Top

 Skip navigation

CSO statistical release, , 11am

Domestic Building Energy Ratings

Quarter 3 2020

Table A: Number of Domestic BER certificates
Period20162017201820192020% change 2020/2019
Quarter 119,66920,13018,19019,62020,8866%
Quarter 222,79723,00423,03523,14510,367-55%
Quarter 321,26122,34921,89324,98923,353-7%
Quarter 423,01922,13222,32123,252  

Domestic BER audits in September 2% higher

Figure 1: Number of Domestic BER Certificates published in 2018-2020
go to full release

There was an increase in the number of Building Energy Rating (BER) audits reported in September 2020 when the number of completed BER audits was 2% above the number in September 2019 (see Table 1 and Figure 1). There were 23,353 Building Energy Rating (BER) audits reported in quarter three 2020 compared with 24,989 in quarter three 2019. This is a decrease of 7% (see Table A and Information Note). In the period 2009 to September 2020 just over one million BER audits have been undertaken (see Table 1). 

Dwellings built in 2015-2020 were considerably more energy efficient than those built in earlier periods with 97% given an “A” rating compared with 35% in 2010-2014 and 1% in 2005-2009 (see Figure 4).

Dublin County had the highest combined “A” and “B” rating at 31% (see Table 4). Roscommon had the lowest proportion of combined “A” and “B” rating at 9%.

Dublin 18, with an average dwelling age of 18 years, had the highest proportion of combined “A” and “B” rating at 44% (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 30% than in Dublin 18. The highest proportion of combined “F” and “G” rating was 26% for Dublin 7.

Mains gas was the main space heating fuel used in 49% of the dwellings completed during 2015-2020 and with a BER audit. This was an increase from 2000-2004 when 41% of dwellings with a BER audit used mains gas. There were contrasting trends for heating oil and electricity with 35% of 2000-2004 built dwellings using heating oil compared with 4% for dwellings built in 2015-2020. In contrast usage of electricity increased from 19% in 2000-2004 to 47% in 2015-2020 (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 158 square metres for detached houses to 61 square metres for basement dwellings.

Table 14 examines dwellings that have had more than one BER audit carried out. In their earliest assessment only 7% of dwellings received either an “A” or “B” rating compared with 21% in their most recent assessment. In contrast, 19% 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).