| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Loft insulation | — | £350 | £73 | 4.8 yrs | +2.5 pts |
| Heating controls | — | £450 | £56 | 8.1 yrs | +1.9 pts |
| Band A condensing boiler | — | £3,000 – £0 | £94 | 16.0 yrs | +3.2 pts · reaches C |
| Floor insulation | — | £6,000 – £0 | £153 | 19.6 yrs | +5.2 pts |
| Solar water heating | — | £6,000 – £0 | £119 | 25.3 yrs | +4.1 pts |
| Solar photovoltaic panels | — | £8,000 – £0 | £141 | 28.3 yrs | +4.8 pts · reaches B |
| Low energy lighting(optional, beyond B) | — | £265 | £7 | 39.6 yrs | +0.2 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 £635 a year — a 5.2% annual return on £12,300.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2015, states £1,171 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £559,286 HPI-indexed estimate, not a valuation
Challum Drive: 57 sales since 1995 · £335,121 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| St Herbert's RC Primary School, a Voluntary Academy | Primary | 0.3 mi | — |
| St Matthew's CofE Primary School | Primary | 0.4 mi | — |
| Bare Trees Primary School | Primary | 0.4 mi | — |
| The Radclyffe School | Secondary | 0.4 mi | Not in the KS4 performance tables |
| North Chadderton School | Secondary | 0.4 mi | Progress 8 -0.28 · below average (2023/24) |
| Saint John Henry Newman Roman Catholic College, A Voluntary Academy | Secondary | 0.8 mi | Not in the KS4 performance tables |
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.
Challum Drive
How this home sits against its street.