| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Draughtproofing | — | £120 | £99 | 1.2 yrs | +3.2 pts |
| High-performance doors | — | £1,000 – £0 | £94 | 5.3 yrs | +3.0 pts |
| Floor insulation | — | £6,000 – £0 | £117 | 25.6 yrs | +3.8 pts |
| Solar water heating | — | £6,000 – £0 | £91 | 33.0 yrs | +2.9 pts · reaches F |
| Solar photovoltaic panels(optional, beyond F) | — | £8,000 – £0 | £108 | 36.9 yrs | +3.5 pts |
| Solid wall insulation(optional, beyond F) | — | £14,000 – £0 | £127 | 50+ yrs | +4.1 pts |
| Double glazing(optional, beyond F) | — | £6,500 – £500 | £42 | 50+ yrs | +1.4 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 £400 a year — a 6.0% annual return on £6,620.
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: £680,455 HPI-indexed estimate, not a valuation
High Street: 292 sales since 1995 · £848,829 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| St Mary's CofE Primary School, Amersham | Primary | 0.2 mi | — |
| Coleshill Church of England Infant School | Primary | 1.3 mi | — |
| Woodside Junior School | Primary | 1.3 mi | — |
| Dr Challoner's Grammar School | Secondary | 0.7 mi | Progress 8 +1.18 · well above average (2023/24) |
| Amersham School | Secondary | 1.1 mi | Progress 8 +0.34 · above average (2023/24) |
| Dr Challoner's High School | Secondary | 2.2 mi | Progress 8 +1.11 · well 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 E01017745, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.
High Street
How this home sits against its street.