| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| High-retention storage heaters | — | £800 – £1,200 | £475 | 2.1 yrs | +16.6 pts · reaches D |
| High-performance doors | — | £1,000 – £0 | £193 | 2.6 yrs | +6.7 pts |
| Cavity wall insulation | — | £500 – £1,500 | £180 | 5.6 yrs | +6.3 pts · reaches C |
| Floor insulation(optional, beyond C) | — | £4,000 – £6,000 | £241 | 20.7 yrs | +8.4 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 £848 a year — a 33.9% annual return on £2,500.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2021, states £1,131 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £144,461 HPI-indexed estimate, not a valuation
Woodmill Lane: 431 sales since 1995 · £239,903 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Bitterne Park Primary & Nursery School - Part of the Learning Federation Partnership of Schools | Primary | 0.4 mi | — |
| Townhill Infant School | Primary | 0.5 mi | — |
| Townhill Junior School | Primary | 0.5 mi | — |
| Bitterne Park School | Secondary | 0.1 mi | Progress 8 -0.19 · average (2023/24) |
| Saint George Catholic Voluntary Aided College Southampton | Secondary | 1.2 mi | Progress 8 +0.82 · well above average (2023/24) |
| Woodlands Community College | Secondary | 1.4 mi | Progress 8 -0.89 · well below 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 E01017176, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.
Woodmill Lane
How this home sits against its street.