The number of non-domestic Building Energy Rating (BER) audits reported between April and June (Q2) 2025 was 12% lower than Q2 2024 (See Figure 1 and Table 1).
For all years 2009-2025, 4% of assessed buildings received an A rating, 15% a B rating and 32% a C rating (See Figure 2 and Table 3).
Schools and colleges were the most energy efficient type of building assessed, with 49% receiving an A rating (See Figure 3 and Table 3).
More than 40% of assessed buildings constructed since 2020 were A rated, compared with 4% of the overall stock (See Figure 4 and Table 13).
Kildare had the highest proportion of A ratings by county, at 7%. Limerick City had the highest proportion of G ratings (17%) (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% each in Dublin 8 and Dublin 6W (See Table 5).
Electricity was the most common main space heating fuel for 60% of assessed buildings, compared with 26% using gas and 10% using heating oil (See Table 7).
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 April to June (Q2) 2025 was 1,395. This was 12% lower than the 1,588 audits reported in Q2 2024 (See Figure 1 and Table A). In total, there were 82,175 non-domestic BER audits reported for the period 2009 to 2025 (See Table 1).
| 2022 | 2023 | 2024 | 2025 | |
| January | 247 | 300 | 416 | 335 |
| February | 386 | 310 | 450 | 367 |
| March | 365 | 490 | 418 | 423 |
| April | 385 | 371 | 482 | 444 |
| May | 357 | 400 | 620 | 508 |
| June | 316 | 420 | 486 | 443 |
| 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 | |
| April | 284 | 385 | 371 | 482 | 444 | -8% | |
| May | 305 | 357 | 400 | 620 | 508 | -18% | |
| June | 259 | 316 | 420 | 486 | 443 | -9% | |
| Year | 848 | 1,058 | 1,191 | 1,588 | 1,395 | -12% | |
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).
| BER Ratings | |
| A | 2.974 |
| B | 11.808 |
| C | 26.066 |
| D | 16.514 |
| E | 8.733 |
| F | 5.133 |
| G | 9.298 |
| 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%). Limerick City had the highest proportions of G rated buildings at 17% (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).
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). In Hotels, mains gas was the most common fuel source for space heating (46%), and heating oil the second most common (29%) (See Table 8). Mains gas (41%) and heating oil (28%) were also the most common main space heating fuel for Nursing Residential Homes and Hostels.
The average floor area for all audited non-domestic buildings was 726 m2. The building type with the largest average floor area was Hotels (3,322 m2) while the smallest was Restaurants and Public Houses (285 m2) (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 | 26 | 18 | 7 | 3 | 2 | 2 |
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Statistician's Comment
The Central Statistics Office (CSO) has today (24 July 2025) published Non-Domestic Building Energy Ratings for Quarter 2 (Q2) 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 April to June (Q2) 2025 was 1,395. This was 12% lower than the 1,588 audits reported in Q2 2024 (See Figure 1 and Table A). In total, there were 82,175 non-domestic BER audits reported for the period 2009 to 2025 (See Table 1). This figure includes multiple audits for some buildings. When reviewing only the most recent audit for each building during this 16-year period, 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 more than two fifths of BERs for non-domestic buildings built between 2020-2024 (44%) and from January to the end of June 2025 (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). In Hotels, mains gas was the most common fuel source for space heating (46%), and heating oil the second most common (29%) (See Table 8).
Local Area Analysis
The highest proportion of A ratings by county was in County Kildare (7%). Limerick City had the highest proportions of G rated buildings at 17% (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% each in Dublin 8 and Dublin 6W (See Table 5).
Floor Area
The average floor area for all audited non-domestic buildings was 726 m2. The building type with the largest average floor area was Hotels (3,322 m2) while the smallest was Restaurants and Public Houses (285 m2) (See Table 10).”