| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Loft insulation | — | £100 – £350 | £89 | 2.5 yrs | +3.3 pts · reaches C |
| Low energy lighting(optional, beyond C) | — | £120 | £8 | 14.7 yrs | +0.3 pts |
| Solid wall insulation(optional, beyond C) | — | £4,000 – £14,000 | £202 | 44.6 yrs | +7.4 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 £89 a year — a 39.6% annual return on £225.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2025, states £702 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £135,587 HPI-indexed estimate, not a valuation
Glenthorne Road: 713 sales since 1995 · £727,203 average over 10 years
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| St John's CofE Junior Mixed and Infant School | Primary | under 0.1 mi | — |
| Holly Park Primary School | Primary | under 0.1 mi | — |
| St Paul's CofE Primary School N11 | Primary | 0.4 mi | — |
| Friern Barnet School | Secondary | under 0.1 mi | Progress 8 0.00 · average (2023/24) |
| The Compton School | Secondary | 0.6 mi | Progress 8 +0.73 · well above average (2023/24) |
| St Andrew the Apostle Greek Orthodox School | Secondary | 0.6 mi | Progress 8 +0.40 · 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.
Glenthorne Road
How this home sits against its street.