Upgrade Plan
Get upgrade quotesThis certificate lists these measures but records the same score with and without them, so there is no saving or rating gain to attribute to any one of them. That usually means the assessment was incomplete — here the assessor recorded no heating system at all. The costs below are real; a fresh assessment would be the way to find the gain.
| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Change of heating system | — | £5,000typical | — | — | — |
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.
Running costs
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: £296,474 HPI-indexed estimate, not a valuation
Hartham Road: 193 sales since 1995 · £556,807 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Marlborough Primary School | Primary | under 0.1 mi | — |
| The Smallberry Green Primary School | Primary | 0.2 mi | — |
| Isleworth Town Primary School | Primary | 0.4 mi | — |
| The Green School for Girls | Secondary | 0.2 mi | Progress 8 +0.64 · well above average (2023/24) |
| The Green School for Boys | Secondary | 0.3 mi | Progress 8 +0.20 · average (2023/24) |
| Isleworth and Syon School for Boys | Secondary | 0.6 mi | Progress 8 +0.09 · 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 E01002682, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.
Hartham Road
How this home sits against its street.