23 Westminster Drive, Cardiff CF23 6RD

Semi-Detached house · Built 1950-1966 · 94 m² · Owner-Occupied · Portable electric heating assumed for most rooms, Room heaters, mains gas

Upgrade Plan

GC for £27,030 · £6,758 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Hot water cylinder insulation£20 – £40£3650.1 yrs+6.0 pts
Draughtproofing£150 – £250£3600.6 yrs+5.9 pts
Flat roof insulation£900 – £1,200£3253.2 yrs+5.3 pts · reaches F
Cavity wall insulation£900 – £1,500£3193.8 yrs+5.2 pts
Loft insulation£900 – £1,200£2045.2 yrs+3.3 pts
Change of heating system£3,500 – £10,000£1,2205.5 yrs+20.0 pts · reaches E
Floor insulation£5,000 – £10,000£42717.5 yrs+7.0 pts · reaches D
Solid wall insulation£7,500 – £11,000£46220.0 yrs+7.6 pts · reaches C
Solar photovoltaic panels(optional, beyond C)£8,000 – £10,000£39622.7 yrs+6.5 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

£5,223
per year at grade G
£1,145
per year at grade C

The full plan saves £3,682 a year — a 13.6% annual return on £27,030.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2025, states £4,829 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

No sale recorded for this address since 1995.

Westminster Drive: 21 sales since 1995 · £320,667 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.

8.6
crimes a month
43
in the last 12 months
Shoplifting
most common · 37% of the total

Police.uk street-level data for LSOA W01001736, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Westminster Drive

How this home sits against its street.

10
graded homes
59.2
average score
D
most common grade
-50.2
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.