21 Gabalfa Avenue, Cardiff CF14 2SG

Semi-Detached house · 1930-1949 · Boiler and radiators, mains gas

Upgrade Plan

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MeasureGrantNet costSaving / yrPaybackGrade effect
Low energy lighting(optional, beyond C)£20 – £50typical£150+ yrs+0.0 pts
Solar water heating(optional, beyond C)£5,000typical£1050+ yrs+0.4 pts
Solar photovoltaic panels(optional, beyond C)£4,500 – £9,000typical£1250+ yrs+0.5 pts

Grants verified 20 August 2026. Costs are the register’s indicative ranges, except where marked typical, which this certificate did not price and which are taken instead from comparable homes of the same type. 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

£598
per year at grade C
£576
per year at grade C

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

15 November 2013£125,000
27 September 2002£93,950
13 June 1997£46,000

Estimated today: £218,644 HPI-indexed estimate, not a valuation

Gabalfa Avenue: 166 sales since 1995 · £222,366 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.

20.5
crimes a month
225
in the last 12 months
Violence and sexual offences
most common · 36% of the total

Police.uk street-level data for LSOA W01001788, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Gabalfa Avenue

How this home sits against its street.

160
graded homes
68.6
average score
C
most common grade
+4.4
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.