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CSO statistical release, , 11am

Non-Domestic Building Energy Ratings

Quarter 3 2018

Table A: Building Energy Ratings by Period of Construction (Non-Domestic)
% of row
Period of constructionEnergy rating 

24% of non-domestic construction between 2015 and 2018 was rated "A"

Figure 1: Building Energy Ratings by Period of Construction (Non-Domestic) 1900-2018
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Building Energy Ratings (BER) audits were conducted for 1,022 non-domestic buildings constructed between 2015 and 2018 (see Table A). Just under one quarter (24%) of these buildings received an “A” rating compared with 8% of non-domestic buildings constructed during 2010 to 2014 (see Figure 1). In contrast, 96% of domestic dwellings constructed between 2015-2018 received an "A" rating (separate CSO release). 

There were 53,874 non-domestic BER audits conducted in the period 2009 to 2018 (see Table 1). The profile of non-domestic BER audits conducted since 2009 was 1% awarded an "A" rating, 14% a "B" rating, and 35% with a “C” rating (see Table 3).

The most energy efficient building types audited during 2009-2018 were Schools and colleges with 24% awarded an “A” rating (see Table 3). The second most energy efficient buildings were Nursing residential homes and hostels with 7% rated “A”. The least energy efficient building types, defined by a “G” rating, were Workshops and maintenance depots (22%) followed by Warehouses (13%) and Office buildings (13%) (see Figure 3).

The highest proportion of combined “A” and “B” ratings were in County Carlow, County Kildare, County Offaly and County Wicklow at 20% each (see Table 4). Kilkenny had the highest proportion of “G” rated buildings at 17% (see Table 4).

Dublin 15 had the highest proportion of combined “A” and “B” ratings at 25% followed by 19% for Dublin 18 (see Table 5). The highest proportion of “G” ratings was 17% in Dublin 8 (see Table 5).

The average floor area of all audited non-domestic dwellings was 671 square metres (see Table 10). This average size varied from 3,391 square metres for hotels to 297 square metres for Restaurants and public houses.