Upgrade Plan
Get upgrade quotes| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Heating controls(optional, beyond E) | — | £400typical | £43 | 9.2 yrs | +1.5 pts |
| Band A condensing boiler(optional, beyond E) | — | £2,600typical | £73 | 35.6 yrs | +2.6 pts |
| Solar photovoltaic panels(optional, beyond E) | — | £4,500 – £9,000typical | £110 | 50+ yrs | +3.9 pts |
| Solid wall insulation(optional, beyond E) | — | £9,000typical | £129 | 50+ yrs | +4.5 pts |
| Double glazing(optional, beyond E) | — | £1,200 – £4,900typical | £43 | 50+ yrs | +1.5 pts |
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. 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
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: £287,540 HPI-indexed estimate, not a valuation
Castlegate: 60 sales since 1995 · £233,080 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| St Wulfram's National Church of England Primary School | Primary | under 0.1 mi | — |
| The Little Gonerby Church of England Primary Academy, Grantham | Primary | 0.4 mi | — |
| Saint Mary's Catholic Voluntary Academy | Primary | 0.5 mi | — |
| The King's School, Grantham | Secondary | 0.2 mi | Progress 8 +1.10 · well above average (2023/24) |
| Charles Read Academy | Secondary | 0.2 mi | Progress 8 +0.58 · well above average (2023/24) |
| Kesteven and Grantham Girls' School | Secondary | 0.3 mi | Progress 8 +1.04 · 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 E01026323, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.
Castlegate
How this home sits against its street.