| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Draughtproofing | — | £80 – £120 | £351 | 0.3 yrs | +5.6 pts |
| Floor insulation | — | £800 – £1,200 | £416 | 2.4 yrs | +6.7 pts |
| Low energy lighting | — | £170 | £18 | 9.3 yrs | +0.3 pts |
| Warm air unit replacement | — | £1,250 – £2,500 | £148 | 12.7 yrs | +2.4 pts · reaches D |
| Solar water heating | — | £4,000 – £6,000 | £323 | 15.5 yrs | +5.2 pts |
| Solid wall insulation | — | £4,000 – £14,000 | £450 | 20.0 yrs | +7.2 pts |
| Solar photovoltaic panels | — | £9,000 – £14,000 | £385 | 29.8 yrs | +6.2 pts · reaches C |
| Double glazing(optional, beyond C) | — | £3,300 – £6,500 | £151 | 32.5 yrs | +2.4 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 £2,092 a year — a 7.3% annual return on £28,645.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2013, states £2,613 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £2,568,584 HPI-indexed estimate, not a valuation
Chartfield Avenue: 355 sales since 1995 · £961,420 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Granard Primary School | Primary | 0.1 mi | — |
| Sacred Heart Catholic Primary School, Roehampton | Primary | 0.5 mi | — |
| Our Lady of Victories Catholic Primary School | Primary | 0.6 mi | — |
| Ark Putney Academy | Secondary | 0.3 mi | Progress 8 +0.23 · above average (2023/24) |
| Ashcroft Technology Academy | Secondary | 1.0 mi | Progress 8 +1.34 · well above average (2023/24) |
| Saint Cecilia's Church of England School | Secondary | 1.2 mi | Progress 8 +0.35 · 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.
Chartfield Avenue
How this home sits against its street.