The number of domestic Building Energy Rating (BER) audits reported in July to September (Q3) 2024 was 4% higher than in Q3 2023 (See Table A and Table 1).
A ratings were given to 99% of all audited dwellings built between 2020-2024 and 95% of those built between 2015-2019 (See Figure 4 and Table 2).
Electricity was the main space heating fuel for 92% of all audited dwellings constructed between 2020-2024 (See Figure 1 and Table 9).
The highest total proportions of A rated dwellings were in Kildare (27%), Meath (25%), and Dublin County (24%), while the lowest were in Leitrim and Cork City (both 4%) (See Table 4).
In the Dublin postal districts, the highest total proportions of A ratings were in Dublin 18 (39%), Dublin 20 (29%), and Dublin 13 (27%) (See Table 5).
| Table A: Number of Domestic BER certificates | ||||||
| number | ||||||
| Period | 2020 | 2021 | 2022 | 2023 | 2024 | % change 2024/2023 |
| July | 7,606 | 8,100 | 10,461 | 12,418 | 13,662 | 10% |
| August | 6,886 | 6,779 | 10,919 | 12,466 | 12,991 | 4% |
| September | 8,769 | 8,165 | 12,421 | 13,562 | 13,257 | -2% |
| Quarter 3 | 23,261 | 23,044 | 33,801 | 38,446 | 39,910 | 4% |
| Mains Gas | Heating Oil | Electricity | |
| 2000-2004 | 40 | 36 | 20 |
| 2005-2009 | 43 | 32 | 19 |
| 2010-2014 | 43 | 33 | 20 |
| 2015-2019 | 44 | 5 | 50 |
| 2020-2024 | 8 | 0 | 92 |
| Earliest | Latest | |
| A | 2 | 9 |
| B1 | 1 | 5 |
| B2 | 3 | 8 |
| B3 | 6 | 15 |
| C1 | 9 | 15 |
| C2 | 11 | 13 |
| C3 | 12 | 10 |
| D1 | 13 | 9 |
| D2 | 12 | 7 |
| E1 | 8 | 3 |
| E2 | 7 | 2 |
| F | 7 | 2 |
| G | 9 | 2 |
| National Data | BER Database | |
| A | 10 | 15 |
| B1 | 2 | 2 |
| B2 | 4 | 4 |
| B3 | 8 | 9 |
| C1 | 10 | 11 |
| C2 | 11 | 11 |
| C3 | 11 | 11 |
| D1 | 11 | 10 |
| D2 | 10 | 8 |
| 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 | 8 | 20 | 23 | 18 | 28 |
| 1978-1999 | 2 | 12 | 41 | 30 | 10 | 5 |
| 2000-2004 | 2 | 18 | 57 | 17 | 4 | 1 |
| 2005-2009 | 4 | 40 | 46 | 8 | 2 | 0 |
| 2010-2014 | 36 | 55 | 7 | 1 | 0 | 0 |
| 2015-2019 | 95 | 4 | 0 | 0 | 0 | 0 |
| 2020-2024 | 99 | 1 | 1 | 0 | 0 | 0 |
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Statistician's Comment
The Central Statistics Office (CSO) has today (17 October 2024) released Domestic Building Energy Ratings for Quarter 3 (Q3) 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 July to September (Q3) 2024 was 39,910. This was 4% higher than the 38,446 audits reported in Q3 2023. In total, over 1.5 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, 15% received an A rating in their most recent audit, 15% a B rating, and 33% a C rating (See Table 2).
Period of Construction
A ratings were given to 99% of all audited dwellings built between 2020-2024 and 95% of those built between 2015-2019. These were substantially more energy efficient than buildings from earlier periods, with 36% of audited dwellings built between 2010-2014 receiving an A rating, and 4% of those from 2005-2009 (See Figure 4 and Table 2).
Main Space Heating Fuel
Electricity was the main space heating fuel for 92% of audited dwellings constructed between 2020-2024. This is substantially higher than the proportion among dwellings constructed between 2015-2019 (50%) and 2010-2014 (20%) (See Figure 1 and Table 9).
Mains gas was the main space heating fuel for 8% of audited dwellings built between 2020-2024, compared with 44% of those built between 2015-2019. Heating oil was the main space heating fuel for 0% (rounded) of dwellings built between 2020-2024, and 5% of dwellings built between 2015-2019. The overall proportion of dwellings using heating oil as the main space heating fuel was 35% (See Figure 1 and Table 9).
Local Area Analysis
By county, the highest proportions of A rated dwellings were in Kildare (27%), Meath (25%), and Dublin County (24%). Leitrim and Cork City had the lowest proportion of A ratings at 4% each. Cork City had the highest average dwelling age, at 46 years (See Table 4).
The highest proportions of G rated dwellings were in counties Roscommon (11%), Leitrim (11%), and Tipperary (10%) (See Table 4).
Among Dublin postal districts, the highest proportions of A ratings were in Dublin 18 (39%), Dublin 20 (29%), and Dublin 13 (27%). The highest proportions of G ratings were in Dublin 06 (13%) and Dublin 07 (13%). The highest average dwelling age was 63 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 116 square metres. The dwelling type with the largest average floor area was detached houses (166 square metres), and the smallest was basement dwellings (61 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 37% 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% receiving F or G ratings in their final assessment (See Table 15)."