21 Downlands Way, Rumney, Cardiff CF3 3BY

Semi-Detached maisonette · Built 1983-1990 · 43 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

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MeasureGrantNet costSaving / yrPaybackGrade effect
Low energy lighting(optional, beyond C)£20£54.4 yrs+0.2 pts
Loft insulation(optional, beyond C)£100 – £350£504.5 yrs+1.7 pts
Band A condensing boiler(optional, beyond C)£2,200 – £3,000£6440.3 yrs+2.2 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

£710
per year at grade C
£591
per year at grade C

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2021, states £435 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

1 November 2023£122,000
15 February 2022£107,000
10 August 2015£81,000
6 December 2007£94,000
2 November 2004£79,950

Estimated today: £121,502 HPI-indexed estimate, not a valuation

Downlands Way: 68 sales since 1995 · £127,929 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.

12.6
crimes a month
101
in the last 12 months
Shoplifting
most common · 27% of the total

Police.uk street-level data for LSOA W01001865, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Downlands Way

How this home sits against its street.

26
graded homes
69.1
average score
C
most common grade
+1.9
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.