4 Highlands, Rumney, Cardiff CF3 3AP

Semi-Detached house · Built 1900-1929 · 71 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

DB for £17,020 · £8,510 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Hot water cylinder insulation£200 – £400£754.0 yrs+4.0 pts
Floor insulation£800 – £1,200£8811.4 yrs+4.7 pts
Low energy lighting£45£411.7 yrs+0.2 pts
Heating controls£350 – £450£3212.5 yrs+1.7 pts
Flat roof insulation£850 – £1,500£6717.6 yrs+3.6 pts · reaches C
Band A condensing boiler£2,200 – £3,000£5448.1 yrs+2.9 pts
Solar water heating£4,000 – £6,000£6850+ yrs+3.6 pts
Solar photovoltaic panels£5,000 – £8,000£8150+ yrs+4.3 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

£1,354
per year at grade D
£884
per year at grade B

The full plan saves £470 a year — a 2.8% annual return on £17,020.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2018, states £850 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

3 May 2019£180,000

Estimated today: £243,141 HPI-indexed estimate, not a valuation

Highlands: 12 sales since 1995 · £227,500 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.

Highlands

How this home sits against its street.

5
graded homes
62
average score
D
most common grade
-4.0
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.