4 Devon Place, Mumbles, Swansea SA3 4DR

Mid-Terrace house · Built 1900-1929 · 111 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

DC for £1,050 · £1,050 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Room-in-roof insulation£900 – £1,200£1347.8 yrs+4.0 pts · reaches C
Cavity wall insulation(optional, beyond C)£900 – £1,500£7316.5 yrs+2.2 pts
Floor insulation(optional, beyond C)£5,000 – £10,000£9750+ yrs+2.9 pts
Solar photovoltaic panels(optional, beyond C)£8,000 – £10,000£9050+ yrs+2.7 pts
Low energy lighting(optional, beyond C)£450 – £525£450+ yrs+0.1 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

£1,715
per year at grade D
£1,317
per year at grade C

The full plan saves £134 a year — a 12.8% annual return on £1,050.

Energy costs as modelled on the certificate, not a bill.

Sold prices

17 October 2011£300,000
13 January 2006£270,000
27 February 2004£212,500

Estimated today: £518,971 HPI-indexed estimate, not a valuation

Devon Place: 36 sales since 1995 · £416,250 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.

7.2
crimes a month
79
in the last 12 months
Violence and sexual offences
most common · 25% of the total

Police.uk street-level data for LSOA W01000825, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Devon Place

How this home sits against its street.

11
graded homes
60.5
average score
D
most common grade
+5.5
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.