| Measure | Grant | Net cost | Saving / yr | Payback | Grade effect |
|---|---|---|---|---|---|
| Cavity wall insulation | — | £500 – £1,500 | £92 | 10.8 yrs | +4.7 pts · reaches D |
| Band A condensing boiler | — | £2,200 – £3,000 | £76 | 34.3 yrs | +3.9 pts |
| Solar photovoltaic panels | — | £3,500 – £5,500 | £114 | 39.4 yrs | +5.9 pts |
| Floor insulation | — | £4,000 – £6,000 | £123 | 40.5 yrs | +6.3 pts · reaches C |
| Solar water heating(optional, beyond C) | — | £4,000 – £6,000 | £96 | 50+ yrs | +4.9 pts |
| Double glazing(optional, beyond C) | — | £3,300 – £6,500 | £45 | 50+ yrs | +2.3 pts |
Grants verified 20 August 2026. Costs are the register’s indicative ranges. Savings are restated at the fuel prices assumed in the latest available month. 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 £406 a year — a 3.1% annual return on £13,100.
Restated at the fuel prices assumed in the latest available month. This certificate, assessed in 2023, states £1,735 a year at the prices assumed then. Modelled costs, not a bill.
Sold prices
Estimated today: £162,939 HPI-indexed estimate, not a valuation
Heol Y Parc: 152 sales since 1995 · £187,563 average over 10 years
Schools nearby
The DfE register covers England. Welsh schools are held in a separate Welsh Government register, which we have not ingested yet.
Heol Y Parc
How this home sits against its street.