EPC rating G: what it means and what it costs
A G is the lowest band: usually old, solid-walled property with no central heating, often off the gas grid. Across 29,731 homes certified at band G since September 2022, the median modelled heating and hot water cost is £3,711 a year, about £309 a month.
What would a G-rated home your size cost to heat?
The same home at band C: about £710 a year, £2,780 less.
Scaled from the median modelled cost per square metre of G-rated homes certified since September 2022. These are the standardised running-cost estimates from EPC assessments, and never a prediction of your actual bill, which depends on your tariff and usage.
Band G by property type
| Property type | Median heating cost/yr | Median floor area | Median CO₂ (t/yr) | Certificates |
|---|---|---|---|---|
| House | £4,003 | 92 m² | 9.2 | 21,545 |
| Flat | £2,887 | 60 m² | 6.4 | 3,949 |
| Bungalow | £3,235 | 73 m² | 7.6 | 3,359 |
| Maisonette | £3,718 | 81 m² | 8 | 640 |
How band G compares
| Band | Median heating cost/yr | vs band G |
|---|---|---|
| A | £360 | £3,351 less |
| B | £301 | £3,410 less |
| C | £636 | £3,075 less |
| D | £1,043 | £2,668 less |
| E | £1,593 | £2,118 less |
| F | £2,348 | £1,363 less |
| G (this page) | £3,711 | — |
Moving up from G
Almost any measure helps, and support schemes usually apply. Get the certificate's recommendations costed first. The full rundown of measures, costs and sensible order is in how to improve your EPC rating, and if the property is rented, the legal position is in EPC rules for landlords.