Building Energy Ratings in Dublin 1
12,031 certificates · median 192 kWh/m²/yr · rank 27 of 52 counties on the share rated B3 or better
Half of the dwellings rated in Dublin 1 use more than 192 kWh/m²/yr.
The national median is 178 kWh/m²/yr. 35.5% of the certificates on the 2009 scale are B3 or better; 22.1% are E, F or G.
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Ratings
2009 scale, A1 to E2 — 10,074 certificates
| Rating | Certificates | Share |
|---|---|---|
| A1 | 23 | 0.2% |
| A2 | 1,127 | 11.2% |
| A3 | 834 | 8.3% |
| B1 | 249 | 2.5% |
| B2 | 490 | 4.9% |
| B3 | 858 | 8.5% |
| C1 | 991 | 9.8% |
| C2 | 1,091 | 10.8% |
| C3 | 1,108 | 11.0% |
| D1 | 1,133 | 11.2% |
| D2 | 1,080 | 10.7% |
| E1 | 657 | 6.5% |
| E2 | 433 | 4.3% |
2026 scale, A0 to E — 844 certificates
| Rating | Certificates | Share |
|---|---|---|
| A0 | 379 | 44.9% |
| A | 125 | 14.8% |
| B | 131 | 15.5% |
| C | 125 | 14.8% |
| D | 59 | 7.0% |
| E | 25 | 3.0% |
F and G — the same on both scales
| Rating | Certificates | Share of all certificates |
|---|---|---|
| F | 436 | 3.6% |
| G | 677 | 5.6% |
⚠️ The two scales are shown apart on purpose: adding a « B » from the 2026 scale to « B1+B2+B3 » from the 2009 scale would produce a number that exists nowhere. F and G belong to both, so they are counted in neither distribution and shown on their own. How the two scales compare.
What the certificates measure
| Certificates | 12,031 |
| Median energy use | 192 kWh/m²/yr |
| Median CO₂ | 34.5 kg CO₂/m²/yr |
| Median floor area | 57 m² |
| Median wall U-value | 0.55 W/m²K |
| Median roof U-value | 0.00 W/m²K |
| Median floor U-value | 0.00 W/m²K |
| Median window U-value | 2.70 W/m²K |
| Median heating system efficiency | 100% |
| Certificates with solar PV | 3 (0.0%) |
| Median renewable energy ratio | 0.00 |
| National median energy use | 178 kWh/m²/yr |
By period of construction
| Built | Certificates | Median kWh/m²/yr | Median wall U-value |
|---|---|---|---|
| before 1900 | 602 | 339 | 1.55 |
| 1900–1944 | 1,200 | 358 | 1.51 |
| 1945–1969 | 566 | 198 | 0.62 |
| 1970–1979 | 100 | 256 | 1.12 |
| 1980–1990 | 866 | 202 | 0.38 |
| 1991–1999 | 2,621 | 235 | 0.68 |
| 2000–2004 | 1,572 | 209 | 0.57 |
| 2005–2009 | 2,048 | 166 | 0.37 |
| 2010–2018 | 234 | 82 | 0.20 |
| 2019 or later | 2,222 | 44 | 0.19 |
Periods with fewer than 11 certificates are not shown separately.
By dwelling type
| Type | Certificates | Median kWh/m²/yr | Median floor area (m²) |
|---|---|---|---|
| Mid-floor apartment | 6,859 | — | — |
| Top-floor apartment | 2,130 | — | — |
| Ground-floor apartment | 1,519 | — | — |
| Mid-terrace house | 849 | — | — |
| End of terrace house | 288 | — | — |
| Maisonette | 135 | — | — |
| Apartment | 97 | — | — |
| Semi-detached house | 74 | — | — |
| Basement Dwelling | 53 | — | — |
| Detached house | 22 | — | — |
Main space heating fuel
| Fuel | Certificates | Share | Median kWh/m²/yr |
|---|---|---|---|
| Electricity | 6,909 | 57.4% | — |
| Mains Gas | 2,654 | 22.1% | — |
| Heating Oil | 25 | 0.2% | — |
| Manufactured Smokeless Fuel | 21 | 0.2% | — |
One certificate is one assessment of one dwelling, not one dwelling: a home rated twice appears twice. How this is counted.