| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Low energy lighting | — | £25 | £6 | 4.3 yrs | +0.3 pts |
| Cavity wall insulation | — | £1,500 – £500 | £100 | 10.0 yrs | +4.7 pts |
| Band A condensing boiler | — | £3,000 – £0 | £82 | 18.2 yrs | +3.8 pts |
| Double glazing | — | £1,400 – £400 | £48 | 18.6 yrs | +2.3 pts · reaches C |
| Floor insulation | — | £6,000 – £0 | £134 | 22.4 yrs | +6.3 pts |
| Solar water heating | — | £6,000 – £0 | £104 | 28.9 yrs | +4.9 pts · reaches B |
| Solar photovoltaic panels(optional, beyond B) | — | £8,000 – £0 | £124 | 32.3 yrs | +5.8 pts |
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
£1,327
per year at grade D
£729
per year at grade B
The full plan saves £474 a year — a 5.0% annual return on £9,425.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2015, states £938 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
12 January 2024£158,000
Estimated today: £172,408 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.