| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Cavity wall insulation | — | £900 – £1,500 | £194 | 6.2 yrs | +4.4 pts |
| Loft insulation | — | £900 – £1,200 | £124 | 8.5 yrs | +2.8 pts |
| High-performance doors | — | £1,800 – £2,400 | £208 | 10.1 yrs | +4.7 pts |
| Shower heat recovery | — | £600 – £1,500 | £43 | 24.6 yrs | +1.0 pts |
| Solar water heating | — | £4,000 – £7,000 | £202 | 27.3 yrs | +4.6 pts · reaches E |
| Floor insulation(optional, beyond E) | — | £5,000 – £10,000 | £260 | 28.9 yrs | +5.9 pts |
| Solar photovoltaic panels(optional, beyond E) | — | £8,000 – £10,000 | £240 | 37.4 yrs | +5.5 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 £770 a year — a 7.1% annual return on £10,900.
Energy costs as modelled on the certificate, not a bill.
Sold prices
Estimated today: £230,257 HPI-indexed estimate, not a valuation
Barr Hill Avenue: 7 sales since 1995
Schools nearby
The schools’ own performance — Progress 8 shows value added, not just raw results.
| School | Phase | Distance | Progress |
|---|---|---|---|
| Summerville Primary School | Primary | 0.2 mi | — |
| St George's CofE Primary School | Primary | 0.6 mi | — |
| St Luke's RC Primary School | Primary | 0.6 mi | — |
| Buile Hill Academy | Secondary | 0.3 mi | Attainment 8 42.9 · no Progress 8 published |
| All Hallows RC High School | Secondary | 0.8 mi | Progress 8 +0.25 · above average (2023/24) |
| The Albion Academy | Secondary | 0.8 mi | Progress 8 -0.04 · 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.