| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Loft insulation | — | £100 – £350 | £239 | 0.9 yrs | +3.5 pts |
| Heating controls | — | £350 – £450 | £183 | 2.2 yrs | +2.7 pts |
| Cavity wall insulation | — | £500 – £1,500 | £375 | 2.7 yrs | +5.5 pts |
| Low energy lighting | — | £60 | £22 | 2.7 yrs | +0.3 pts |
| Room-in-roof insulation | — | £1,500 – £2,700 | £693 | 3.0 yrs | +10.1 pts · reaches F |
| Solar photovoltaic panels | — | £3,500 – £5,500 | £465 | 9.7 yrs | +6.8 pts |
| Floor insulation | — | £4,000 – £6,000 | £502 | 10.0 yrs | +7.4 pts |
| Solar water heating | — | £4,000 – £6,000 | £390 | 12.8 yrs | +5.7 pts · reaches E |
Grants verified 20 August 2026. Costs are the register’s indicative ranges. Savings are restated at the fuel prices assumed in July 2026. Points per measure are estimated from 19.9 million certificates and rescaled to this home’s own certificate delta; the total is the register’s figure.
Running costs
£5,368
per year at grade G
£2,499
per year at grade E
The full plan saves £2,869 a year — a 15.7% annual return on £18,285.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2024, states £5,507 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
3 December 2024£110,000
8 September 2006£75,000
23 September 2005£25,000
4 June 2004£20,000
2 August 2002£36,950
Estimated today: £110,738 HPI-indexed estimate, not a valuation
Schools nearby
The DfE register covers England. Welsh schools are held in a separate Welsh Government register, which we have not ingested yet.