Building Energy Ratings in Co. Cavan
20,181 certificates · median 187 kWh/m²/yr · rank 36 of 52 counties on the share rated B3 or better
Half of the dwellings rated in Co. Cavan use more than 187 kWh/m²/yr.
The national median is 178 kWh/m²/yr. 33.2% of the certificates on the 2009 scale are B3 or better; 22.8% are E, F or G.
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Ratings
2009 scale, A1 to E2 — 16,924 certificates
| Rating | Certificates | Share |
|---|---|---|
| A1 | 113 | 0.7% |
| A2 | 959 | 5.7% |
| A3 | 775 | 4.6% |
| B1 | 705 | 4.2% |
| B2 | 1,010 | 6.0% |
| B3 | 2,057 | 12.2% |
| C1 | 2,541 | 15.0% |
| C2 | 2,433 | 14.4% |
| C3 | 1,841 | 10.9% |
| D1 | 1,666 | 9.8% |
| D2 | 1,308 | 7.7% |
| E1 | 838 | 5.0% |
| E2 | 678 | 4.0% |
2026 scale, A0 to E — 948 certificates
| Rating | Certificates | Share |
|---|---|---|
| A0 | 166 | 17.5% |
| A | 148 | 15.6% |
| B | 340 | 35.9% |
| C | 187 | 19.7% |
| D | 66 | 7.0% |
| E | 41 | 4.3% |
F and G — the same on both scales
| Rating | Certificates | Share of all certificates |
|---|---|---|
| F | 776 | 3.8% |
| G | 1,533 | 7.6% |
⚠️ 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 | 20,181 |
| Median energy use | 187 kWh/m²/yr |
| Median CO₂ | 44.2 kg CO₂/m²/yr |
| Median floor area | 118 m² |
| Median wall U-value | 0.37 W/m²K |
| Median roof U-value | 0.21 W/m²K |
| Median floor U-value | 0.41 W/m²K |
| Median window U-value | 2.50 W/m²K |
| Median heating system efficiency | 86% |
| Certificates with solar PV | 289 (1.4%) |
| 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 | 672 | 426 | 1.69 |
| 1900–1944 | 1,715 | 380 | 1.44 |
| 1945–1969 | 1,360 | 316 | 1.01 |
| 1970–1979 | 1,425 | 266 | 0.58 |
| 1980–1990 | 1,626 | 231 | 0.40 |
| 1991–1999 | 2,062 | 205 | 0.39 |
| 2000–2004 | 4,302 | 184 | 0.54 |
| 2005–2009 | 5,262 | 155 | 0.37 |
| 2010–2018 | 537 | 67 | 0.21 |
| 2019 or later | 1,220 | 40 | 0.17 |
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 | 10,424 | — | — |
| Semi-detached house | 5,090 | — | — |
| Mid-terrace house | 1,497 | — | — |
| End of terrace house | 922 | — | — |
| Top-floor apartment | 642 | — | — |
| House | 538 | — | — |
| Ground-floor apartment | 532 | — | — |
| Mid-floor apartment | 350 | — | — |
| Maisonette | 157 | — | — |
| Apartment | 18 | — | — |
Main space heating fuel
| Fuel | Certificates | Share | Median kWh/m²/yr |
|---|---|---|---|
| Heating Oil | 12,747 | 63.2% | — |
| Electricity | 3,848 | 19.1% | — |
| Mains Gas | 1,659 | 8.2% | — |
| Solid Multi-Fuel | 877 | 4.3% | — |
| Bulk LPG (propane or butane) | 792 | 3.9% | — |
| House Coal | 41 | 0.2% | — |
| Bottled LPG | 40 | 0.2% | — |
| Wood Pellets (bulk supply for | 36 | 0.2% | — |
| Manufactured Smokeless Fuel | 25 | 0.1% | — |
| Wood Logs | 12 | 0.1% | — |
One certificate is one assessment of one dwelling, not one dwelling: a home rated twice appears twice. How this is counted.