The number of audits reported in January to March (Q1) 2024 was 10% higher than in Q1 2023 (See Table A and Table 1).
Dwellings built between 2015-2019 and 2020-2024 were substantially more energy efficient than those from earlier periods, with 95% and 99% respectively receiving an A rating (See Figure 4 and Table 2).
Electricity was the main space heating fuel for 90% of audited dwellings constructed between 2020-2024 (See Figure 1 and Table 9).
The highest proportions of A rated dwellings were in Kildare (26%), Meath (24%), and Dublin County (23%), while the lowest was in Leitrim (3%) (See Table 4).
In the Dublin postal districts, the highest proportions of A ratings were in Dublin 18 (37%), Dublin 20 (28%), and Dublin 13 (26%) (See Table 5).
| Table A: Number of Domestic BER certificates | ||||||
| number | ||||||
| Period | 2020 | 2021 | 2022 | 2023 | 2024 | % change 2024/2023 |
| January | 5,893 | 3,772 | 5,942 | 8,836 | 10,680 | 21% |
| February | 7,625 | 4,796 | 7,372 | 11,077 | 12,619 | 14% |
| March | 7,176 | 6,044 | 8,386 | 12,293 | 12,209 | -1% |
| Quarter 1 | 20,694 | 14,612 | 21,700 | 32,206 | 35,508 | 10% |
| Mains Gas | Heating Oil | Electricity | |
| 2000-2004 | 40 | 36 | 20 |
| 2005-2009 | 44 | 32 | 19 |
| 2010-2014 | 44 | 33 | 20 |
| 2015-2019 | 45 | 5 | 49 |
| 2020-2024 | 9 | 0 | 90 |
| Earliest | Latest | |
| A | 2 | 7 |
| B1 | 1 | 5 |
| B2 | 3 | 8 |
| B3 | 6 | 15 |
| C1 | 9 | 15 |
| C2 | 11 | 13 |
| C3 | 12 | 11 |
| D1 | 13 | 9 |
| D2 | 12 | 7 |
| E1 | 8 | 4 |
| E2 | 7 | 2 |
| F | 7 | 2 |
| G | 9 | 2 |
| National Data | BER Database | |
| A | 10 | 14 |
| B1 | 2 | 2 |
| B2 | 4 | 4 |
| B3 | 8 | 8 |
| C1 | 10 | 11 |
| C2 | 11 | 12 |
| C3 | 11 | 11 |
| D1 | 11 | 10 |
| D2 | 10 | 9 |
| E1 | 6 | 5 |
| E2 | 5 | 4 |
| F | 5 | 4 |
| G | 8 | 6 |
1Dwellings with BERs have been weighted using 2016 Census of Population data to estimate a BER profile for All Dwellings at National level (See Background Notes).
| A | B | C | D | E | F-G | |
| 1700-1977 | 2 | 7 | 20 | 23 | 18 | 30 |
| 1978-1999 | 2 | 11 | 41 | 31 | 10 | 5 |
| 2000-2004 | 1 | 17 | 58 | 18 | 4 | 1 |
| 2005-2009 | 3 | 39 | 47 | 8 | 2 | 0 |
| 2010-2014 | 35 | 56 | 7 | 1 | 0 | 0 |
| 2015-2019 | 95 | 4 | 0 | 0 | 0 | 0 |
| 2020-2024 | 99 | 1 | 0 | 0 | 0 | 0 |
Statistician's Comment
The Central Statistics Office (CSO) has today (18 April 2024) released Domestic Building Energy Ratings for Quarter 1 (Q1) 2024.
Commenting on the release, Kevin Hunt, Statistician in the Climate and Energy Division, said: "The number of domestic Building Energy Rating (BER) audits reported in January to March (Q1) 2024 was 35,508. This was 10% higher than the 32,206 audits reported in Q1 2023. In total, 1.4 million BER audits were published from 2009-2024 (See Table A and Table 1).
Of the 1.2 million unique dwellings to receive an audit since 2009, 14% received an A rating in their most recent audit, 14% a B rating, and 34% a C rating (See Table 2).
Period of Construction
A ratings were given to 99% of audited dwellings built between 2020-2024 and 95% of those built between 2015-2019. In comparison, 35% of audited dwellings built between 2010-2014 received an A rating, and just 3% of those from 2005-2009 (See Figure 4 and Table 2).
Main Space Heating Fuel
Electricity was the main space heating fuel for 90% of audited dwellings constructed between 2020-2024. This is substantially higher than the proportion among dwellings constructed between 2015-2019 (49%) and 2010-2014 (20%). Mains gas was the main space heating fuel for 9% of audited dwellings built between 2020-2024, compared with 45% of those built between 2015-2019. Heating oil was the main space heating fuel for 5% of dwellings built between 2015-2019 and 0% of dwellings built between 2020-2024 (See Figure 1 and Table 9).
Local Area Analysis
By county, the highest proportions of A rated dwellings were in Kildare (26%), Meath (24%), and Dublin County (23%). Leitrim had the lowest proportion of A ratings, at 3%, followed by Cork City (4%). Cork City also had the highest average dwelling age, at 46 years (See Table 4).
The highest proportions of G rated dwellings were in counties Roscommon (12%), Leitrim (11%), and Tipperary (10%) (See Table 4).
Among Dublin postal districts, the highest proportions of A ratings were in Dublin 18 (37%), Dublin 20 (28%), and Dublin 13 (26%). The highest proportions of G ratings were in Dublin 06 (14%) and Dublin 07 (13%). The highest average dwelling age was 62 years in Dublin 06, and the lowest was 15 years in Dublin 18 (See Table 5).
Floor Area
The average floor area for all dwellings with a BER audit was 115 square metres. The dwelling type with the largest average floor area was detached houses (165 square metres), and the smallest was basement dwellings (60 square metres) (See Table 12).
Dwellings with Multiple BER Audits
Some dwellings have had more than one BER audit conducted. Of these, 12% received an A or B rating in their earliest assessment, while 35% received an A or B rating in their most recent assessment. In contrast, 16% of dwellings with multiple audits were rated F or G in their first assessment, compared with 4% of the final ratings (See Table 15)."