| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Draughtproofing | — | £80 – £120 | £93 | 1.1 yrs | +3.5 pts · reaches C |
| Loft insulation | — | £100 – £350 | £53 | 4.3 yrs | +2.0 pts |
| Heating controls | — | £350 – £450 | £40 | 9.9 yrs | +1.5 pts |
| Low energy lighting | — | £55 | £5 | 11.4 yrs | +0.2 pts |
| Cavity wall insulation | — | £500 – £1,500 | £83 | 12.1 yrs | +3.1 pts |
| Band A condensing boiler | — | £2,200 – £3,000 | £68 | 38.3 yrs | +2.6 pts |
| Solar water heating | — | £4,000 – £6,000 | £86 | 50+ yrs | +3.2 pts · reaches B |
| Solar photovoltaic panels(optional, beyond B) | — | £5,000 – £8,000 | £102 | 50+ yrs | +3.9 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 £427 a year — a 4.6% annual return on £9,380.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2015, states £1,043 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £319,752 HPI-indexed estimate, not a valuation
Topfields Grove: 15 sales since 1995 · £315,863 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Brentnall Academy | Primary | under 0.1 mi | — |
| Broughton Jewish Cassel Fox Primary School | Primary | 0.2 mi | — |
| St Thomas of Canterbury RC Primary School | Primary | 0.4 mi | — |
| Beis Yaakov High School | Secondary | 0.2 mi | Progress 8 +0.88 · well above average (2023/24) |
| The King David High School | Secondary | 0.8 mi | Progress 8 +0.50 · above average (2023/24) |
| The Albion Academy | Secondary | 1.2 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.
Topfields Grove
How this home sits against its street.