122 Arran Street, Cardiff CF24 3HU

Mid-Terrace house · Built 1900-1929 · 73 m² · Owner-Occupied · 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£6750+ yrs+5.7 pts
Solar water heating£4,000 – £6,000£5650+ yrs+4.7 pts · reaches B
Solid wall insulation(optional, beyond B)£4,000 – £14,000£7850+ yrs+6.6 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

£930
per year at grade C
£729
per year at grade B

The full plan saves £123 a year — a 1.3% annual return on £9,500.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2021, states £577 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

12 September 2024£270,000
24 September 2021£255,050
11 May 2018£217,000
22 June 1998£59,995

Estimated today: £275,858 HPI-indexed estimate, not a valuation

Arran Street: 72 sales since 1995 · £233,860 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.

13
crimes a month
143
in the last 12 months
Violence and sexual offences
most common · 36% of the total

Police.uk street-level data for LSOA W01001834, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Arran Street

How this home sits against its street.

16
graded homes
56.4
average score
D
most common grade
+14.6
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.