The number of non-domestic Building Energy Rating (BER) audits reported between January and March (Q1) 2025 was 13% lower than Q1 2024 (See Figure 1 and Table 1).
For the years 2009-2025, 4% of assessed non-domestic buildings received an A rating, 15% a B rating, and 32% a C rating (See Figure 2 and Table 3).
Newer builds were more energy efficient than the older stock, with A ratings awarded to more than 40% of those constructed since 2020 (See Figure 4 and Table 13).
By type of building, Schools and Colleges were the most energy efficient, with 49% receiving an A rating (See Figure 3 and Table 3).
For 60% of audited buildings the main space heating fuel was electricity, compared with 26% using mains gas and 10% using heating oil (See Table 6).
By county, the highest proportion of A ratings was in County Kildare (7%). County Kilkenny, County Sligo, and Limerick City had the highest proportions of G rated buildings at 16% each (See Table 4).
In the Dublin postal districts, the highest proportion of A ratings was in Dublin 20 (8%), while the highest proportion of G ratings was 17% in Dublin 8 and Dublin 6W (See Table 5).
More detailed data on Non-Domestic Building Energy Ratings, by type of premises, main space heating fuel and location, can now be found on our PxStat tables: NDBER01, NDBER02 and NDBER03.
BER certificates expire after 10 years unless a new audit has been undertaken. This means that certificates from more than 10 years ago have expired if they were not updated. The CSO has included these expired certificates in this release in order to have a more representative analysis of energy efficiency in the non-domestic sector.
Provisional BER certificates for buildings that are incomplete or not yet constructed have been excluded from this release. This exclusion also applies to new Shell and Core Buildings, which are rated and sold as bare structures before being fully fitted.
The number of non-domestic Building Energy Rating (BER) audits reported in January to March (Q1) 2025 was 1,119. This was 13% lower than the 1,284 audits reported in Q1 2024. In total, there were 80,774 non-domestic BER audits reported for the period 2009 to 2025 (See Figure 1 and Table 1).
| 2022 | 2023 | 2024 | 2025 | |
| January | 247 | 300 | 416 | 334 |
| February | 386 | 310 | 450 | 367 |
| March | 365 | 490 | 418 | 418 |
| April | 385 | 371 | 482 | |
| May | 357 | 400 | 620 | |
| June | 316 | 420 | 486 | |
| July | 395 | 471 | 443 | |
| August | 394 | 351 | 409 | |
| September | 416 | 437 | 552 | |
| October | 288 | 437 | 431 | |
| November | 394 | 420 | 487 | |
| December | 293 | 353 | 387 |
| Table A Number of Non-Domestic BER certificates | |||||||
| Number | % change | ||||||
| Period | 2021 | 2022 | 2023 | 2024 | 2025 | 2025/2024 | |
| January | 280 | 247 | 300 | 416 | 334 | -20% | |
| February | 262 | 386 | 310 | 450 | 367 | -18% | |
| March | 268 | 365 | 490 | 418 | 418 | 0% | |
| Year | 810 | 998 | 1,100 | 1,284 | 1,119 | -13% | |
Including only the most recent audit for each building, 4% of buildings were awards an A rating, 15% a B rating, and 32% a C rating (See Figure 2 and Table 3).
| BER Ratings | |
| A | 2.82 |
| B | 11.508 |
| C | 25.657 |
| D | 16.318 |
| E | 8.61 |
| F | 5.066 |
| G | 9.18 |
| BER Ratings | |
| A | 2.694 |
| B | 11.271 |
| C | 25.347 |
| D | 16.102 |
| E | 8.535 |
| F | 5.019 |
| G | 9.097 |
Schools and Colleges were the most energy efficient non-domestic building type audited, with 49% receiving an A rating. The second most energy efficient building type were Nursing Residential Homes and Hostels, with 16% rated A. The highest proportion of G ratings were in Workshops and Maintenance Depots (23%) (See Figure 3 and Table 3).
| A | B | C | D | E | F | G | |
| Retail | 1 | 16 | 38 | 18 | 10 | 6 | 12 |
| Office | 2 | 10 | 29 | 24 | 13 | 8 | 14 |
| Restaurant/public house | 0 | 9 | 33 | 33 | 15 | 5 | 4 |
| Hotel | 4 | 27 | 39 | 19 | 6 | 3 | 2 |
| Warehouses | 2 | 16 | 33 | 20 | 10 | 6 | 14 |
| Workshops/maintenance depot | 0 | 9 | 23 | 22 | 14 | 10 | 23 |
| Industrial process building | 3 | 31 | 27 | 16 | 11 | 4 | 9 |
| Hospitals and primary health care | 9 | 14 | 25 | 21 | 12 | 8 | 10 |
| Community/day centre | 10 | 24 | 29 | 17 | 8 | 5 | 7 |
| Nursing residential homes and hostels | 16 | 41 | 26 | 12 | 3 | 1 | 2 |
| Schools and colleges | 49 | 18 | 16 | 10 | 3 | 2 | 3 |
| Sports facilities | 3 | 30 | 29 | 17 | 8 | 6 | 8 |
| Other | 16 | 18 | 21 | 14 | 9 | 6 | 15 |
The highest proportion of A ratings by county was in County Kildare (7%). County Kilkenny, County Sligo and Limerick City had the highest proportions of G rated buildings at 16% each (See Table 4). In the Dublin postal districts, the highest proportion of A ratings was in Dublin 20 (9%), while the highest proportion of G ratings was 17% in Dublin 8 and Dublin 6W (See Table 5).
For 60% of audited buildings the main space heating fuel was electricity, compared with 26% using mains gas and 10% using heating oil (See Table 6). Mains gas was the most common fuel source for space heating in Hotels (46%) (See Table 8).
The average floor area for all audited non-domestic buildings was 721m2. The building type with the largest average floor area was Hotels (3,272m2 ) while the smallest was Restaurants and Public Houses (285m2) (See Table 10).
A ratings were given to over two fifths of BERs for non-domestic buildings built between 2020-2024 (44%) and in 2025 to-date (42%). In comparison, 21% of BERs were A ratings for buildings built between 2015-2019, and 4% of the overall audited stock (See Table 13).
| A | B | C | D | E | F | G | |
| 1900-1977 | 0 | 7 | 29 | 26 | 15 | 9 | 13 |
| 1978-1999 | 0 | 13 | 36 | 23 | 12 | 7 | 10 |
| 2000-2004 | 0 | 18 | 43 | 19 | 8 | 4 | 7 |
| 2005-2009 | 2 | 17 | 34 | 18 | 9 | 6 | 14 |
| 2010-2014 | 6 | 22 | 28 | 19 | 10 | 5 | 10 |
| 2015-2019 | 21 | 35 | 19 | 10 | 4 | 2 | 9 |
| 2020-2024 | 44 | 20 | 16 | 9 | 4 | 3 | 4 |
| 2025-2029 | 42 | 29 | 16 | 8 | 2 | 1 | 3 |
| A | B | C | D | E | F | G | |
| 1900-1977 | 0 | 7 | 29 | 26 | 16 | 9 | 13 |
| 1978-1999 | 0 | 13 | 36 | 23 | 12 | 7 | 10 |
| 2000-2004 | 0 | 18 | 43 | 19 | 8 | 4 | 7 |
| 2005-2009 | 2 | 17 | 34 | 18 | 9 | 6 | 14 |
| 2010-2014 | 6 | 22 | 28 | 19 | 10 | 5 | 10 |
| 2015-2019 | 21 | 35 | 19 | 10 | 4 | 2 | 9 |
| 2020-2024 | 44 | 20 | 17 | 9 | 4 | 3 | 4 |
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Statistician's Comment
The Central Statistics Office (CSO) has today (16 April 2025) published Non-Domestic Building Energy Ratings for Quarter 1 (Q1) 2025.
Commenting on the release, Kevin Hunt, Statistician in the Climate and Energy Division, said: "The number of non-domestic Building Energy Rating (BER) audits reported in January to March (Q1) 2024 was 1,119. This was 13% lower than the 1,284 audits reported in Q1 2024 (See Figure 1 and Table A). In total, there were 80,774 non-domestic BER audits reported for the period 2009 to 2025 (see Table 1). This figure includes multiple audits for some buildings. Including only the most recent audit for each building, 4% of buildings were awarded an A rating, 15% a B rating, and 32% a C rating (See Figure 2 and Table 3).
Energy Efficiency by Period of Construction
A ratings were given to over two fifths of BERs for non-domestic buildings built between 2020-2024 (44%) and in 2025 to-date (42%). In comparison, 21% of BERs were A ratings for buildings built between 2015-2019, and 4% of the overall audited stock (See Table 13).
Energy Efficiency by Building Type
Schools and Colleges were the most energy efficient non-domestic building type audited, with 49% receiving an A rating. The second most energy efficient building type were Nursing Residential Homes and Hostels, with 16% rated A. The highest proportion of G ratings were in Workshops and Maintenance Depots (23%) (See Figure 3 and Table 3).
Main Space Heating Fuel
For 60% of audited buildings the main space heating fuel was electricity, compared with 26% using mains gas and 10% using heating oil (See Table 6). Mains gas was the most common fuel source for space heating in Hotels (46%) (See Table 8).
Local Area Analysis
The highest proportion of A ratings by county was in County Kildare (7%). County Kilkenny, County Sligo and Limerick City had the highest proportions of G rated buildings at 16% each (See Table 4). In the Dublin postal districts, the highest proportion of A ratings was in Dublin 20 (9%), while the highest proportion of G ratings was 17% in Dublin 8 and Dublin 6W (See Table 5).
Floor Area
The average floor area for all audited non-domestic buildings was 721m2. The building type with the largest average floor area was Hotels (3,272m2) while the smallest was Restaurants and Public Houses (285m2) (See Table 10).”