28 Sinclair Drive, Penylan, Cardiff CF23 9AH

Semi-Detached house · Built 1991-1995 · 109 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

DB for £19,100 · £9,550 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Band A condensing boiler£2,200 – £3,000£8132.0 yrs+3.5 pts · reaches C
Floor insulation£4,000 – £6,000£13237.8 yrs+5.7 pts
Solar water heating£4,000 – £6,000£10348.7 yrs+4.4 pts
Solar photovoltaic panels£5,000 – £8,000£12350+ yrs+5.3 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

£1,346
per year at grade D
£907
per year at grade B

The full plan saves £439 a year — a 2.3% annual return on £19,100.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2017, states £875 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

6 April 2018£263,000
14 October 2005£207,500

Estimated today: £368,772 HPI-indexed estimate, not a valuation

Sinclair Drive: 26 sales since 1995 · £296,250 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.

23.2
crimes a month
255
in the last 12 months
Violence and sexual offences
most common · 24% of the total

Police.uk street-level data for LSOA W01001822, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Sinclair Drive

How this home sits against its street.

14
graded homes
61.9
average score
D
most common grade
+5.1
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.