| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Hot water cylinder insulation | — | £23 – £300typical | £76 | 2.1 yrs | +1.8 pts |
| Loft insulation | — | £225typical | £42 | 5.3 yrs | +1.0 pts |
| Cavity wall insulation | — | £1,000typical | £67 | 15.0 yrs | +1.6 pts |
| Change of heating system | — | £5,000typical | £254 | 19.7 yrs | +6.1 pts |
| Solar water heating | — | £5,000typical | £69 | 50+ yrs | +1.7 pts · reaches F |
| Solar photovoltaic panels(optional, beyond F) | — | £4,500 – £9,000typical | £82 | 50+ yrs | +2.0 pts |
| Double glazing(optional, beyond F) | — | £1,200 – £4,900typical | £32 | 50+ yrs | +0.8 pts |
Grants verified 20 August 2026. Costs are the register’s indicative ranges, except where marked typical, which this certificate did not price and which are taken instead from comparable homes of the same type. 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 £508 a year — a 4.5% annual return on £11,387.
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: £491,164 HPI-indexed estimate, not a valuation
Lexden Drive: 66 sales since 1995 · £401,866 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Farnham Green Primary School | Primary | 0.3 mi | — |
| Grove Primary School | Primary | 0.3 mi | — |
| Barley Lane Primary School | Primary | 0.4 mi | — |
| Chadwell Heath Academy | Secondary | 0.3 mi | Progress 8 +0.37 · above average (2023/24) |
| Mayfield School | Secondary | 0.8 mi | Progress 8 0.00 · average (2023/24) |
| Oaks Park High School | Secondary | 1.0 mi | Progress 8 +0.63 · 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 E01033592, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.
Lexden Drive
How this home sits against its street.