| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Low energy lighting | — | £15 | £3 | 4.6 yrs | +0.2 pts |
| Floor insulation | — | £800 – £1,200 | £75 | 13.4 yrs | +4.7 pts |
| Heating controls | — | £350 – £450 | £27 | 14.7 yrs | +1.7 pts · reaches C |
| Cavity wall insulation | — | £500 – £1,500 | £56 | 17.9 yrs | +3.5 pts |
| Solar photovoltaic panels | — | £3,500 – £5,500 | £69 | 50+ yrs | +4.3 pts |
| Solar water heating | — | £4,000 – £6,000 | £58 | 50+ yrs | +3.6 pts · reaches B |
| Solid wall insulation(optional, beyond B) | — | £4,000 – £14,000 | £81 | 50+ yrs | +5.0 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
£1,147
per year at grade D
£778
per year at grade B
The full plan saves £288 a year — a 2.4% annual return on £11,915.
Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2020, states £724 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
21 April 2017£197,000
11 March 2011£115,000
31 January 2002£66,500
Estimated today: £249,550 HPI-indexed estimate, not a valuation
Cowper Street: 366 sales since 1995 · £230,145 average over 10 years
Schools nearby
No school in the register within reach of this postcode.
Cowper Street
How this home sits against its street.
158
graded homes
60.8
average score
D
most common grade
+3.2
this home vs street