| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Floor insulation | — | £800 – £1,200 | £68 | 14.7 yrs | +5.5 pts |
| Cavity wall insulation | — | £500 – £1,500 | £51 | 19.6 yrs | +4.1 pts |
| Solar photovoltaic panels | — | £3,500 – £5,500 | £63 | 50+ yrs | +5.1 pts · reaches B |
| Solar water heating(optional, beyond B) | — | £4,000 – £6,000 | £53 | 50+ yrs | +4.3 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
The full plan saves £182 a year — a 2.8% annual return on £6,500.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2023, states £1,298 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £154,308 HPI-indexed estimate, not a valuation
Cranbrook Street: 56 sales since 1995 · £108,300 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Radcliffe Hall Church of England Methodist Primary School | Primary | 0.3 mi | — |
| St Peter's Church of England Primary School | Primary | 0.7 mi | — |
| Gorsefield Primary School | Primary | 0.8 mi | — |
| Star Radcliffe Academy | Secondary | 0.6 mi | Not in the KS4 performance tables |
| The Derby High School | Secondary | 0.9 mi | Not in the KS4 performance tables |
| Bury Church of England High School | Secondary | 1.2 mi | Progress 8 -0.31 · 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.
Cranbrook Street
How this home sits against its street.