| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Heating controls | — | £350 – £450 | £62 | 6.5 yrs | +2.8 pts |
| Cavity wall insulation | — | £500 – £1,500 | £127 | 7.9 yrs | +5.7 pts |
| Room-in-roof insulation | — | £1,500 – £2,700 | £234 | 9.0 yrs | +10.6 pts · reaches D |
| Low energy lighting | — | £115 | £7 | 15.5 yrs | +0.3 pts |
| Double glazing | — | £1,000 – £1,400 | £61 | 19.6 yrs | +2.8 pts |
| Floor insulation | — | £4,000 – £6,000 | £169 | 29.5 yrs | +7.7 pts · reaches C |
| Solar water heating | — | £4,000 – £6,000 | £131 | 38.1 yrs | +6.0 pts |
| Solar photovoltaic panels | — | £5,000 – £8,000 | £157 | 41.5 yrs | +7.1 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 £948 a year — a 4.4% annual return on £21,315.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2016, states £1,209 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £398,038 HPI-indexed estimate, not a valuation
Thornhill: 57 sales since 1995 · £347,885 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Chacombe CEVA Primary Academy | Primary | under 0.1 mi | — |
| Middleton Cheney Primary Academy | Primary | 1.3 mi | — |
| Cropredy Church of England Primary School | Primary | 2.3 mi | — |
| Chenderit School | Secondary | 1.0 mi | Progress 8 +0.18 · average (2023/24) |
| Blessed George Napier Catholic School and Sixth Form | Secondary | 3.9 mi | Progress 8 +0.24 · above average (2023/24) |
| Futures Institute Banbury | Secondary | 3.9 mi | Progress 8 -0.56 · 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.
Thornhill
How this home sits against its street.