| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Loft insulation | — | £100 – £350 | £161 | 1.4 yrs | +3.7 pts |
| Flue gas heat recovery | — | £400 – £900 | £329 | 2.0 yrs | +7.7 pts |
| Floor insulation | — | £800 – £1,200 | £338 | 3.0 yrs | +7.9 pts · reaches E |
| Cavity wall insulation | — | £500 – £1,500 | £252 | 4.0 yrs | +5.9 pts |
| Change of heating system | — | £3,000 – £7,000 | £964 | 5.2 yrs | +22.5 pts · reaches C |
| Solar photovoltaic panels | — | £3,500 – £5,500 | £313 | 14.4 yrs | +7.3 pts |
| Solar water heating | — | £4,000 – £6,000 | £262 | 19.1 yrs | +6.1 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 £2,618 a year — a 15.1% annual return on £17,375.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2021, states £2,226 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £237,788 HPI-indexed estimate, not a valuation
Derby Road: 111 sales since 1995 · £241,726 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Cherbourg Primary School | Primary | 0.1 mi | — |
| Norwood Primary & Pre-School | Primary | 0.4 mi | — |
| The Crescent Primary School | Primary | 0.6 mi | — |
| Crestwood Community School | Secondary | 1.0 mi | Progress 8 -0.73 · well below average (2023/24) |
| The Toynbee School | Secondary | 1.4 mi | Progress 8 +0.20 · average (2023/24) |
| Saint George Catholic Voluntary Aided College Southampton | Secondary | 1.8 mi | Progress 8 +0.82 · 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 E01022670, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.
Derby Road
How this home sits against its street.