| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Low energy lighting | — | £15 | £2 | 7.2 yrs | +0.3 pts |
| Floor insulation | — | £1,200 – £200 | £48 | 14.7 yrs | +5.8 pts |
| Solar photovoltaic panels | — | £5,500 – £500 | £44 | 50+ yrs | +5.4 pts · reaches B |
| Solar water heating(optional, beyond B) | — | £6,000 – £0 | £37 | 50+ yrs | +4.5 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 £94 a year — a 2.5% annual return on £3,715.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2020, states £581 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £552,727 HPI-indexed estimate, not a valuation
Twynersh Avenue: 104 sales since 1995 · £362,427 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Pyrcroft Grange Primary School | Primary | 0.2 mi | — |
| St Anne's Catholic Primary School | Primary | 0.6 mi | — |
| Stepgates Community School | Primary | 0.7 mi | — |
| Salesian School, Chertsey | Secondary | 0.9 mi | Progress 8 +0.96 · well above average (2023/24) |
| Chertsey High School | Secondary | 1.1 mi | Progress 8 -0.03 · average (2023/24) |
| Jubilee High School | Secondary | 1.7 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.
Twynersh Avenue
How this home sits against its street.