| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Heating controls | — | £220 – £250 | £37 | 6.4 yrs | +1.5 pts |
| Floor insulation | — | £5,000 – £10,000 | £101 | 50+ yrs | +4.2 pts |
| Solid wall insulation | — | £7,500 – £11,000 | £109 | 50+ yrs | +4.5 pts |
| Solar photovoltaic panels | — | £8,000 – £10,000 | £93 | 50+ yrs | +3.8 pts · reaches C |
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 £340 a year — a 1.3% annual return on £25,985.
Energy costs as modelled on the certificate, not a bill.
Sold prices
Estimated today: £336,170 HPI-indexed estimate, not a valuation
Charles Street: 334 sales since 1995 · £259,499 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Knockhall Primary School | Primary | 0.7 mi | — |
| Stone St Mary's CofE Primary School | Primary | 0.8 mi | — |
| The Craylands School | Primary | 1.3 mi | — |
| Stone Lodge School | Secondary | 1.1 mi | Progress 8 -0.15 · average (2023/24) |
| Leigh Academy Ebbsfleet | Secondary | 1.8 mi | Progress 8 -0.13 · average (2023/24) |
| Sir Geoffrey Leigh Academy | Secondary | 1.9 mi | Progress 8 +0.14 · 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.
Charles Street
How this home sits against its street.