21 Mill Road, Caerphilly CF83 3FD

Mid-Terrace house · Built before 1900 · 84 m² · Boiler and radiators, mains gas

Upgrade Plan

ED for £17,520 · £17,520 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Low energy lighting£20£63.6 yrs+0.2 pts
Band A condensing boiler£1,500 – £3,500£7931.8 yrs+2.3 pts
Solar water heating£4,000 – £6,000£9950+ yrs+2.9 pts
Solid wall insulation£5,500 – £14,500£13850+ yrs+4.0 pts · reaches D
Double glazing(optional, beyond D)£2,500 – £6,500£4650+ yrs+1.3 pts
Solar photovoltaic panels(optional, beyond D)£11,000 – £20,000£11950+ yrs+3.4 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

£1,903
per year at grade E
£1,416
per year at grade D

The full plan saves £322 a year — a 1.8% annual return on £17,520.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2012, states £1,158 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

23 November 2012£120,000
3 May 2012£60,000
27 March 2000£42,500

Estimated today: £232,878 HPI-indexed estimate, not a valuation

Mill Road: 168 sales since 1995 · £158,786 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.

20.7
crimes a month
207
in the last 12 months
Anti-social behaviour
most common · 32% of the total

Police.uk street-level data for LSOA W01001370, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Mill Road

How this home sits against its street.

71
graded homes
57.5
average score
D
most common grade
-11.5
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.