| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Hot water cylinder insulation | — | £30 | £264 | 0.1 yrs | +9.1 pts |
| Floor insulation | — | £1,200 – £200 | £309 | 2.3 yrs | +10.6 pts · reaches F |
| Low energy lighting | — | £35 | £14 | 2.6 yrs | +0.5 pts |
| Change of heating system | — | £7,000 – £0 | £882 | 4.0 yrs | +30.3 pts · reaches E |
| Solar photovoltaic panels | — | £5,500 – £500 | £286 | 10.5 yrs | +9.8 pts · reaches D |
| Solar water heating | — | £6,000 – £0 | £240 | 12.5 yrs | +8.2 pts · reaches C |
| Solid wall insulation | — | £14,000 – £0 | £334 | 21.0 yrs | +11.5 pts · reaches B |
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
The full plan saves £2,328 a year — a 13.5% annual return on £17,265.
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: £561,838 HPI-indexed estimate, not a valuation
Black Boy Lane: 42 sales since 1995 · £544,048 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Chestnuts Primary School | Primary | 0.1 mi | — |
| West Green Primary School | Primary | 0.2 mi | — |
| Harris Primary Academy Philip Lane | Primary | 0.3 mi | — |
| Park View School | Secondary | 0.1 mi | Progress 8 +0.01 · average (2023/24) |
| Skinners' Academy | Secondary | 0.8 mi | Progress 8 +0.16 · average (2023/24) |
| All Saints Catholic High School | Secondary | 1.0 mi | Progress 8 +0.27 · above 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.
Black Boy Lane
How this home sits against its street.