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 |
|---|---|---|---|---|---|
| Low energy lighting | — | £20 | — | — | — |
Grants verified 20 August 2026. Costs are the register’s indicative ranges.
Running costs
Energy costs as modelled on the certificate, not a bill. This fuel has too few recent certificates to restate at today's prices.
Sold prices
Estimated today: £1,051,962 HPI-indexed estimate, not a valuation
Sumner Street: 134 sales since 1995 · £744,676 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| The Cathedral School of St Saviour and St Mary Overie | Primary | 0.4 mi | — |
| Friars Primary Foundation School | Primary | 0.4 mi | — |
| Charles Dickens Primary School | Primary | 0.4 mi | — |
| Haberdashers' Borough Academy | Secondary | 0.3 mi | Progress 8 -0.23 · below average (2023/24) |
| London Nautical, City of London Academy | Secondary | 0.3 mi | Not in the KS4 performance tables |
| Notre Dame Catholic Girls' School | Secondary | 0.7 mi | Progress 8 +0.25 · 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 E01003934, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.
Sumner Street
How this home sits against its street.