Upgrade Plan
Get upgrade quotesThis certificate lists these measures but records the same score with and without them, so there is no saving or rating gain to attribute to any one of them. That usually means the assessment was incomplete — here the assessor recorded no heating system at all. The costs below are real; a fresh assessment would be the way to find the gain.
| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Solar photovoltaic panels | — | £4,500 – £9,000typical | — | — | — |
| Solid wall insulation | — | £9,000typical | — | — | — |
Grants verified 20 August 2026. Costs are the register’s indicative ranges, except where marked typical, which this certificate did not price and which are taken instead from comparable homes of the same type.
Running costs
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2011, states £836 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £1,106,827 HPI-indexed estimate, not a valuation
Knoll Rise: 207 sales since 1995 · £317,295 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Perry Hall Primary School | Primary | 0.5 mi | — |
| Holy Innocents Catholic Primary School | Primary | 0.7 mi | — |
| Harris Primary Academy Orpington | Primary | 0.9 mi | — |
| St Olave's and St Saviour's Grammar School | Secondary | 0.7 mi | Progress 8 +1.27 · well above average (2023/24) |
| Harris Academy Orpington | Secondary | 0.9 mi | Progress 8 +0.15 · average (2023/24) |
| Newstead Wood School | Secondary | 0.9 mi | Progress 8 +1.05 · 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.
Area context
Police-recorded crime for the wider neighbourhood, not this address. We grade homes, never neighbourhoods — so this is reported as a count, not a rating.
Police.uk street-level data for LSOA E01000814, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.
Knoll Rise
How this home sits against its street.