12 Kember Close, St. Mellons, Cardiff CF3 0NW

Detached house · Built 1983-1990 · 101 m² · Owner-occupied · Boiler and radiators, mains gas

Upgrade Plan

EB for £21,145 · £7,048 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Floor insulation£800 – £1,200£1715.9 yrs+6.8 pts · reaches D
Low energy lighting£45£76.0 yrs+0.3 pts
Cavity wall insulation£500 – £1,500£1287.8 yrs+5.1 pts
Band A condensing boiler£2,200 – £3,000£10524.8 yrs+4.2 pts · reaches C
Solar water heating£4,000 – £6,000£13337.7 yrs+5.3 pts
Solar photovoltaic panels£9,000 – £14,000£15850+ yrs+6.3 pts · reaches B

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

£1,686
per year at grade E
£984
per year at grade B

The full plan saves £702 a year — a 3.3% annual return on £21,145.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2014, states £1,131 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

30 May 2008£189,950
25 April 2008£180,000
12 May 2000£82,000
31 December 1997£83,450

Estimated today: £326,958 HPI-indexed estimate, not a valuation

Kember Close: 164 sales since 1995 · £181,567 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.

13.5
crimes a month
149
in the last 12 months
Violence and sexual offences
most common · 50% of the total

Police.uk street-level data for LSOA W01001880, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Kember Close

How this home sits against its street.

42
graded homes
70.2
average score
C
most common grade
-16.2
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.