| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Hot water cylinder insulation | — | £15 – £30 | £149 | 0.2 yrs | +4.8 pts |
| Floor insulation | — | £800 – £1,200 | £174 | 5.7 yrs | +5.7 pts |
| Low energy lighting | — | £60 | £8 | 7.9 yrs | +0.2 pts |
| Band A condensing boiler | — | £2,200 – £3,000 | £107 | 24.3 yrs | +3.5 pts · reaches D |
| Solar water heating | — | £4,000 – £6,000 | £135 | 37.0 yrs | +4.4 pts |
| Solid wall insulation | — | £4,000 – £14,000 | £188 | 47.8 yrs | +6.1 pts |
| Solar photovoltaic panels | — | £9,000 – £14,000 | £161 | 50+ yrs | +5.2 pts · reaches C |
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 £923 a year — a 3.2% annual return on £29,183.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2014, states £1,596 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £635,496 HPI-indexed estimate, not a valuation
Sundial Avenue: 56 sales since 1995 · £617,542 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Cypress Primary School | Primary | 0.3 mi | — |
| St Mark's Church of England Primary Academy | Primary | 0.4 mi | — |
| South Norwood Primary | Primary | 0.6 mi | — |
| Harris Academy South Norwood | Secondary | 0.3 mi | Progress 8 +0.45 · above average (2023/24) |
| Harris City Academy Crystal Palace | Secondary | 0.6 mi | Progress 8 +0.24 · above average (2023/24) |
| Harris Academy Beulah Hill | Secondary | 1.0 mi | Progress 8 0.00 · 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.
Sundial Avenue
How this home sits against its street.