| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Hot water cylinder insulation | — | £15 – £30 | £125 | 0.2 yrs | +3.8 pts |
| Draughtproofing | — | £80 – £120 | £124 | 0.8 yrs | +3.8 pts |
| Low energy lighting | — | £20 | £6 | 3.1 yrs | +0.2 pts |
| High-retention storage heaters | — | £1,500 – £2,000 | £289 | 6.1 yrs | +8.8 pts · reaches D |
| Floor insulation | — | £800 – £1,200 | £147 | 6.8 yrs | +4.5 pts |
| High-performance doors | — | £1,500 – £500 | £117 | 8.5 yrs | +3.6 pts · reaches C |
| Solar water heating(optional, beyond C) | — | £4,000 – £6,000 | £114 | 44.0 yrs | +3.5 pts |
| Solar photovoltaic panels(optional, beyond C) | — | £9,000 – £14,000 | £136 | 50+ yrs | +4.2 pts |
| Double glazing(optional, beyond C) | — | £3,300 – £6,500 | £53 | 50+ yrs | +1.6 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 £808 a year — a 20.8% annual return on £3,893.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2014, states £1,371 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £308,327 HPI-indexed estimate, not a valuation
Castleway: 68 sales since 1995 · £202,511 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Holy Family VA RC Primary School | Primary | 0.4 mi | — |
| Summerville Primary School | Primary | 0.5 mi | — |
| St Luke's CofE Primary School | Primary | 0.6 mi | — |
| Buile Hill Academy | Secondary | 0.2 mi | Attainment 8 42.9 · no Progress 8 published |
| All Hallows RC High School | Secondary | 0.7 mi | Progress 8 +0.25 · above average (2023/24) |
| The Albion Academy | Secondary | 0.8 mi | Progress 8 -0.04 · 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.
Castleway
How this home sits against its street.