| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Hot water cylinder insulation | — | £23 – £300typical | £160 | 1.0 yrs | +6.9 pts |
| Loft insulation | — | £225typical | £89 | 2.5 yrs | +3.9 pts |
| Low energy lighting | — | £30 – £75typical | £8 | 6.4 yrs | +0.4 pts |
| Cavity wall insulation | — | £1,000typical | £140 | 7.2 yrs | +6.1 pts · reaches E |
| Band A condensing boiler | — | £2,600typical | £115 | 22.7 yrs | +5.0 pts |
| Solar water heating | — | £5,000typical | £145 | 34.5 yrs | +6.3 pts · reaches D |
| Solar photovoltaic panels(optional, beyond D) | — | £4,500 – £9,000typical | £173 | 39.0 yrs | +7.5 pts |
Grants verified 20 August 2026. Costs are the register’s indicative ranges, except where marked typical, which this certificate did not price and which are taken instead from comparable homes of the same type. 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
The full plan saves £656 a year — a 7.3% annual return on £9,039.
Energy costs as modelled on the certificate, not a bill. This fuel has too few recent certificates to restate at today's prices.
Sold prices
Estimated today: £407,267 HPI-indexed estimate, not a valuation
Castle Grove: 31 sales since 1995 · £288,708 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Holcombe Brook Primary School | Primary | under 0.1 mi | — |
| Greenmount Primary School | Primary | 0.4 mi | — |
| Hazlehurst Primary Academy | Primary | 0.6 mi | — |
| Woodhey High School | Secondary | 0.4 mi | Progress 8 +0.05 · average (2023/24) |
| Tottington High School | Secondary | 1.2 mi | Progress 8 -0.65 · well below average (2023/24) |
| The Elton High School | Secondary | 2.0 mi | Progress 8 -0.24 · below average (2023/24) |
Schools from the DfE register, performance from the KS4 performance tables. Progress 8 is a GCSE measure, so primaries have none. Distance is straight-line from the postcode, not a catchment: admission is decided by the school, not by us.
Castle Grove
How this home sits against its street.