21 Three Cliffs Drive, Southgate, Swansea SA3 2BN

Semi-Detached house · Built 1930-1949 · 119 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

CB for £10,500 · £10,500 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Floor insulation£800 – £1,200£4820.9 yrs+4.1 pts
Solar photovoltaic panels£3,500 – £5,500£4450+ yrs+3.8 pts
Solar water heating£4,000 – £6,000£3750+ yrs+3.2 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

£1,360
per year at grade C
£1,231
per year at grade B

The full plan saves £129 a year — a 1.2% annual return on £10,500.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2020, states £857 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

21 May 2021£290,000
27 November 2020£236,000
11 August 2006£202,000
9 March 2001£67,000

Estimated today: £365,578 HPI-indexed estimate, not a valuation

Three Cliffs Drive: 45 sales since 1995 · £272,054 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.

4.6
crimes a month
23
in the last 12 months
Violence and sexual offences
most common · 35% of the total

Police.uk street-level data for LSOA W01000839, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Three Cliffs Drive

How this home sits against its street.

25
graded homes
62.8
average score
D
most common grade
+9.2
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.