Ffynnon Sulien, Corwen LL21 9BT

Detached house · Built before 1900 · 89 m² · Owner-Occupied · Boiler and radiators, dual fuel (mineral and wood)

Upgrade Plan

FA for £42,500 · £8,500 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Heating controls£350 – £450£1303.1 yrs+3.2 pts · reaches E
Cavity wall insulation£500 – £1,500£2663.8 yrs+6.7 pts
Room-in-roof insulation£1,500 – £2,700£4924.3 yrs+12.3 pts · reaches D
Floor insulation£4,000 – £6,000£35614.0 yrs+8.9 pts
Solar water heating£4,000 – £6,000£27718.1 yrs+6.9 pts · reaches C
Solid wall insulation£4,000 – £14,000£38523.4 yrs+9.6 pts · reaches B
Wind turbine£15,000 – £25,000£29550+ 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

£5,164
per year at grade F
£2,962
per year at grade A

The full plan saves £2,202 a year — a 5.2% annual return on £42,500.

Energy costs as modelled on the certificate, not a bill. This fuel has too few recent certificates to restate at today's prices.

Sold prices

9 August 2024£296,500
5 September 2014£185,000

Estimated today: £303,333 HPI-indexed estimate, not a valuation

Schools nearby

The DfE register covers England. Welsh schools are held in a separate Welsh Government register, which we have not ingested yet.

Area context

Police-recorded crime for the wider neighbourhood, not this address. We grade homes, never neighbourhoods — so this is reported as a count, not a rating.

10
crimes a month
100
in the last 12 months
Violence and sexual offences
most common · 56% of the total

Police.uk street-level data for LSOA W01000193, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.