| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Hot water cylinder insulation | — | £20 – £40 | £108 | 0.3 yrs | +4.2 pts · reaches D |
| Draughtproofing | — | £150 – £250 | £107 | 1.9 yrs | +4.1 pts |
| High-performance doors | — | £1,800 – £2,400 | £101 | 20.8 yrs | +3.9 pts |
| Air or ground source heat pump | −£7,500 Boiler Upgrade Scheme | £0 – £22,500 | £323 | 34.9 yrs | +12.4 pts · reaches C |
| Floor insulation | — | £5,000 – £10,000 | £126 | 50+ yrs | +4.9 pts |
| Solar photovoltaic panels | — | £8,000 – £10,000 | £117 | 50+ yrs | +4.5 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 £882 a year — a 2.9% annual return on £30,080.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2025, states £1,633 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £389,492 HPI-indexed estimate, not a valuation
Rabournmead Drive: 573 sales since 1995 · £264,784 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Willow Tree Primary School | Primary | 0.3 mi | — |
| Earlsmead Primary School | Primary | 0.4 mi | — |
| Deanesfield Primary School | Primary | 0.6 mi | — |
| Islip Manor High School | Secondary | 0.3 mi | Progress 8 -0.24 · below average (2023/24) |
| Queensmead School | Secondary | 0.4 mi | Progress 8 +0.68 · well above average (2023/24) |
| Rooks Heath School | Secondary | 0.7 mi | Progress 8 +0.32 · 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.
Rabournmead Drive
How this home sits against its street.