Building Energy Ratings in Co. Wicklow
46,933 certificates · median 158 kWh/m²/yr · rank 6 of 52 counties on the share rated B3 or better
Half of the dwellings rated in Co. Wicklow use more than 158 kWh/m²/yr.
The national median is 178 kWh/m²/yr. 50.5% of the certificates on the 2009 scale are B3 or better; 15.2% are E, F or G.
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Ratings
2009 scale, A1 to E2 — 41,626 certificates
| Rating | Certificates | Share |
|---|---|---|
| A1 | 782 | 1.9% |
| A2 | 9,616 | 23.1% |
| A3 | 3,325 | 8.0% |
| B1 | 1,451 | 3.5% |
| B2 | 2,114 | 5.1% |
| B3 | 3,719 | 8.9% |
| C1 | 3,979 | 9.6% |
| C2 | 3,944 | 9.5% |
| C3 | 3,634 | 8.7% |
| D1 | 3,320 | 8.0% |
| D2 | 2,855 | 6.9% |
| E1 | 1,651 | 4.0% |
| E2 | 1,236 | 3.0% |
2026 scale, A0 to E — 1,962 certificates
| Rating | Certificates | Share |
|---|---|---|
| A0 | 290 | 14.8% |
| A | 317 | 16.2% |
| B | 660 | 33.6% |
| C | 477 | 24.3% |
| D | 141 | 7.2% |
| E | 77 | 3.9% |
F and G — the same on both scales
| Rating | Certificates | Share of all certificates |
|---|---|---|
| F | 1,348 | 2.9% |
| G | 1,997 | 4.3% |
⚠️ 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 | 46,933 |
| Median energy use | 158 kWh/m²/yr |
| Median CO₂ | 33.2 kg CO₂/m²/yr |
| Median floor area | 108 m² |
| Median wall U-value | 0.37 W/m²K |
| Median roof U-value | 0.20 W/m²K |
| Median floor U-value | 0.41 W/m²K |
| Median window U-value | 2.20 W/m²K |
| Median heating system efficiency | 91% |
| Certificates with solar PV | 547 (1.2%) |
| Median renewable energy ratio | 0.23 |
| National median energy use | 178 kWh/m²/yr |
By period of construction
| Built | Certificates | Median kWh/m²/yr | Median wall U-value |
|---|---|---|---|
| before 1900 | 1,468 | 336 | 1.65 |
| 1900–1944 | 3,685 | 304 | 1.37 |
| 1945–1969 | 2,586 | 269 | 1.25 |
| 1970–1979 | 4,987 | 220 | 0.88 |
| 1980–1990 | 5,064 | 208 | 0.60 |
| 1991–1999 | 5,237 | 193 | 0.55 |
| 2000–2004 | 5,419 | 179 | 0.55 |
| 2005–2009 | 4,953 | 148 | 0.37 |
| 2010–2018 | 2,887 | 57 | 0.18 |
| 2019 or later | 10,647 | 39 | 0.18 |
Periods with fewer than 11 certificates are not shown separately.
By dwelling type
| Type | Certificates | Median kWh/m²/yr | Median floor area (m²) |
|---|---|---|---|
| Detached house | 15,351 | — | — |
| Semi-detached house | 14,574 | — | — |
| Mid-terrace house | 5,967 | — | — |
| End of terrace house | 3,722 | — | — |
| Ground-floor apartment | 2,230 | — | — |
| Top-floor apartment | 1,880 | — | — |
| Mid-floor apartment | 1,572 | — | — |
| Maisonette | 983 | — | — |
| House | 587 | — | — |
| Apartment | 50 | — | — |
Main space heating fuel
| Fuel | Certificates | Share | Median kWh/m²/yr |
|---|---|---|---|
| Electricity | 15,477 | 33.0% | — |
| Mains Gas | 15,260 | 32.5% | — |
| Heating Oil | 14,313 | 30.5% | — |
| Solid Multi-Fuel | 668 | 1.4% | — |
| Manufactured Smokeless Fuel | 382 | 0.8% | — |
| Bulk LPG (propane or butane) | 250 | 0.5% | — |
| House Coal | 63 | 0.1% | — |
| Wood Pellets (bulk supply for | 55 | 0.1% | — |
| Bottled LPG | 53 | 0.1% | — |
| Wood Logs | 38 | 0.1% | — |
One certificate is one assessment of one dwelling, not one dwelling: a home rated twice appears twice. How this is counted.