20 Cantref Close, Thornhill, Cardiff CF14 9HF

Semi-Detached house · Built 1991-1995 · 55 m² · Rented (Private) · Boiler and radiators, mains gas

Upgrade Plan

CB for £9,500 · £9,500 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Solar photovoltaic panels£3,500 – £5,500£2750+ yrs+5.5 pts
Floor insulation£4,000 – £6,000£2950+ yrs+5.9 pts · reaches B
Solar water heating(optional, beyond B)£4,000 – £6,000£2350+ yrs+4.6 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

£742
per year at grade C
£663
per year at grade B

The full plan saves £56 a year — a 0.6% annual return on £9,500.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2020, states £475 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

22 February 2019£178,000
16 April 2010£147,500
27 July 2004£135,000
9 June 2000£72,500
22 August 1995£43,000

Estimated today: £239,499 HPI-indexed estimate, not a valuation

Cantref Close: 41 sales since 1995 · £217,278 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.

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.

3.3
crimes a month
30
in the last 12 months
Violence and sexual offences
most common · 57% of the total

Police.uk street-level data for LSOA W01001793, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Cantref Close

How this home sits against its street.

11
graded homes
70
average score
C
most common grade
+2.0
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.