| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Floor insulation | — | £1,200 – £200 | £291 | 2.4 yrs | +6.0 pts |
| Loft insulation | — | £350 | £138 | 2.5 yrs | +2.8 pts |
| Room-in-roof insulation | — | £2,700 – £700 | £401 | 4.2 yrs | +8.2 pts · reaches D |
| Heating controls | — | £450 | £106 | 4.2 yrs | +2.2 pts |
| Band A condensing boiler | — | £3,000 – £0 | £179 | 8.4 yrs | +3.7 pts |
| Solar photovoltaic panels | — | £5,500 – £500 | £269 | 11.1 yrs | +5.5 pts · reaches C |
| Solar water heating(optional, beyond C) | — | £6,000 – £0 | £226 | 13.3 yrs | +4.6 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 £1,384 a year — a 18.0% annual return on £7,700.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2020, states £2,113 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £1,010,101 HPI-indexed estimate, not a valuation
Green Close: 4 sales since 1995
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Writtle Infant School | Primary | 0.2 mi | — |
| Writtle Junior School | Primary | 0.4 mi | — |
| Westlands Community Primary School | Primary | 1.2 mi | — |
| Hylands School | Secondary | 0.7 mi | Progress 8 -0.86 · well below average (2023/24) |
| King Edward VI Grammar School, Chelmsford | Secondary | 1.8 mi | Progress 8 +1.11 · well above average (2023/24) |
| Chelmsford County High School for Girls | Secondary | 2.0 mi | Progress 8 +0.76 · well 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.