| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Floor insulation | — | £5,000 – £10,000 | £212 | 35.4 yrs | +6.0 pts · reaches C |
| Solid wall insulation | — | £7,500 – £11,000 | £229 | 40.4 yrs | +6.5 pts |
| Solar photovoltaic panels | — | £8,000 – £10,000 | £196 | 45.9 yrs | +5.5 pts · reaches B |
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 £637 a year — a 2.5% annual return on £25,750.
Energy costs as modelled on the certificate, not a bill.
Sold prices
Estimated today: £1,594,254 HPI-indexed estimate, not a valuation
Defoe Avenue: 109 sales since 1995 · £1,340,984 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| The King's Church of England Primary School | Primary | 0.2 mi | — |
| Kew Riverside Primary School | Primary | 0.4 mi | — |
| Grove Park Primary School | Primary | 0.5 mi | — |
| Chiswick School | Secondary | 0.9 mi | Progress 8 +0.45 · above average (2023/24) |
| Brentford School for Girls | Secondary | 1.2 mi | Progress 8 +0.25 · above average (2023/24) |
| Christ's Church of England Comprehensive Secondary School | Secondary | 1.5 mi | Progress 8 +0.31 · 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 E01003846, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.
Defoe Avenue
How this home sits against its street.