| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Floor insulation | — | £800 – £1,200 | £163 | 6.1 yrs | +6.9 pts |
| Solar photovoltaic panels | — | £3,500 – £5,500 | £151 | 29.8 yrs | +6.4 pts · reaches C |
| Solar water heating | — | £4,000 – £6,000 | £127 | 39.5 yrs | +5.3 pts |
| Solid wall insulation | — | £4,000 – £14,000 | £176 | 50+ yrs | +7.4 pts · reaches B |
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
£1,488
per year at grade D
£871
per year at grade B
The full plan saves £617 a year — a 3.2% annual return on £19,500.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2021, states £904 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
17 April 2026£337,000
18 February 2022£330,000
23 May 2005£174,950
15 November 2002£138,500
Estimated today: £333,973 HPI-indexed estimate, not a valuation
St Austell Drive: 190 sales since 1995 · £309,563 average over 10 years
Schools nearby
No school in the register within reach of this postcode.
St Austell Drive
How this home sits against its street.
75
graded homes
53.9
average score
D
most common grade
+7.1
this home vs street