| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Draughtproofing | — | £80 – £120 | £104 | 1.0 yrs | +4.5 pts |
| Loft insulation | — | £100 – £350 | £59 | 3.8 yrs | +2.6 pts · reaches D |
| Low energy lighting | — | £30 | £5 | 5.6 yrs | +0.2 pts |
| Flue gas heat recovery | — | £900 | £120 | 7.5 yrs | +5.2 pts |
| Floor insulation | — | £800 – £1,200 | £123 | 8.1 yrs | +5.4 pts |
| Heating controls | — | £350 – £450 | £45 | 8.9 yrs | +2.0 pts · reaches C |
| Band A condensing boiler | — | £2,200 – £3,000 | £76 | 34.4 yrs | +3.3 pts |
| Solid wall insulation | — | £4,000 – £14,000 | £133 | 50+ yrs | +5.8 pts |
| Solar photovoltaic panels | — | £9,000 – £14,000 | £114 | 50+ yrs | +5.0 pts · reaches B |
| Double glazing(optional, beyond B) | — | £3,300 – £6,500 | £45 | 50+ yrs | +1.9 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 £777 a year — a 3.0% annual return on £25,755.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2012, states £969 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £698,685 HPI-indexed estimate, not a valuation
Thorkhill Road: 153 sales since 1995 · £804,396 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Long Ditton St Mary's CofE (Aided) Junior School | Primary | 0.4 mi | — |
| Thames Ditton Junior School | Primary | 0.4 mi | — |
| Long Ditton Infant and Nursery School | Primary | 0.5 mi | — |
| Hinchley Wood School | Secondary | 0.8 mi | Progress 8 +0.68 · well above average (2023/24) |
| The Hollyfield School and Sixth Form Centre | Secondary | 1.3 mi | Progress 8 +0.28 · above average (2023/24) |
| Southborough High School | Secondary | 1.4 mi | Progress 8 +0.29 · 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.
Area context
Police-recorded crime for the wider neighbourhood, not this address. We grade homes, never neighbourhoods — so this is reported as a count, not a rating.
Police.uk street-level data for LSOA E01030350, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.
Thorkhill Road
How this home sits against its street.