Building Energy Ratings in Dublin 2
6,715 certificates · median 189 kWh/m²/yr · rank 22 of 52 counties on the share rated B3 or better
Half of the dwellings rated in Dublin 2 use more than 189 kWh/m²/yr.
The national median is 178 kWh/m²/yr. 38.3% of the certificates on the 2009 scale are B3 or better; 18.7% are E, F or G.
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Ratings
2009 scale, A1 to E2 — 6,040 certificates
| Rating | Certificates | Share |
|---|---|---|
| A1 | 10 | 0.2% |
| A2 | 874 | 14.5% |
| A3 | 373 | 6.2% |
| B1 | 132 | 2.2% |
| B2 | 364 | 6.0% |
| B3 | 559 | 9.3% |
| C1 | 589 | 9.8% |
| C2 | 650 | 10.8% |
| C3 | 673 | 11.1% |
| D1 | 689 | 11.4% |
| D2 | 536 | 8.9% |
| E1 | 342 | 5.7% |
| E2 | 249 | 4.1% |
2026 scale, A0 to E — 145 certificates
| Rating | Certificates | Share |
|---|---|---|
| A | 9 | 6.2% |
| B | 51 | 35.2% |
| C | 64 | 44.1% |
| D | 14 | 9.7% |
| E | 7 | 4.8% |
F and G — the same on both scales
| Rating | Certificates | Share of all certificates |
|---|---|---|
| F | 233 | 3.5% |
| G | 297 | 4.4% |
⚠️ 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 | 6,715 |
| Median energy use | 189 kWh/m²/yr |
| Median CO₂ | 34.3 kg CO₂/m²/yr |
| Median floor area | 61 m² |
| Median wall U-value | 0.58 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 | 6 (0.1%) |
| 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 | 297 | 344 | 1.53 |
| 1900–1944 | 905 | 236 | 1.22 |
| 1945–1969 | 337 | 220 | 0.89 |
| 1970–1979 | 221 | 235 | 0.96 |
| 1980–1990 | 426 | 232 | 0.60 |
| 1991–1999 | 1,454 | 235 | 0.65 |
| 2000–2004 | 665 | 188 | 0.55 |
| 2005–2009 | 1,123 | 153 | 0.52 |
| 2010–2018 | 503 | 48 | 0.20 |
| 2019 or later | 784 | 43 | 0.20 |
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 | 3,689 | — | — |
| Top-floor apartment | 1,381 | — | — |
| Ground-floor apartment | 880 | — | — |
| Mid-terrace house | 370 | — | — |
| Maisonette | 147 | — | — |
| End of terrace house | 127 | — | — |
| Semi-detached house | 63 | — | — |
| Apartment | 21 | — | — |
| Detached house | 17 | — | — |
| Basement Dwelling | 15 | — | — |
Main space heating fuel
| Fuel | Certificates | Share | Median kWh/m²/yr |
|---|---|---|---|
| Electricity | 3,025 | 45.0% | — |
| Mains Gas | 2,460 | 36.6% | — |
| Manufactured Smokeless Fuel | 12 | 0.2% | — |
One certificate is one assessment of one dwelling, not one dwelling: a home rated twice appears twice. How this is counted.