23 Unwin Close, Southampton SO19 9TF

Semi-Detached flat · Built 1983-1990 · 41 m² · Owner-Occupied · Electric storage heaters

Upgrade Plan

DC for £9,630 · £9,630 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Hot water cylinder insulation£20 – £40£1090.3 yrs+3.3 pts
High-performance doors£900 – £1,200£10210.3 yrs+3.1 pts
Shower heat recovery£600 – £1,500£2149.8 yrs+0.6 pts
Floor insulation£5,000 – £10,000£12850+ yrs+3.9 pts · reaches C

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

£1,222
per year at grade D
£861
per year at grade C

The full plan saves £361 a year — a 3.7% annual return on £9,630.

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

Sold prices

17 February 2026£153,000
5 March 2021£135,000
24 October 2018£132,000
9 March 2007£118,500
22 April 2005£113,500
27 May 2002£75,500
21 July 2000£58,500
26 June 1998£43,000
7 April 1995£39,950

Estimated today: £153,166 HPI-indexed estimate, not a valuation

Unwin Close: 118 sales since 1995

Schools nearby

The schools’ own performance — Progress 8 shows value added, not just raw results.

SchoolPhaseDistanceProgress
Woolston Infant SchoolPrimary0.5 mi
St Patrick's Catholic Primary SchoolPrimary0.7 mi
Weston Shore Infant SchoolPrimary0.8 mi
Weston Secondary SchoolSecondary1.1 miProgress 8 -0.71 · well below average (2023/24)
Oasis Academy SholingSecondary1.4 miProgress 8 -0.66 · well below average (2023/24)
Oasis Academy MayfieldSecondary1.5 miProgress 8 -0.37 · below average (2023/24)

Schools from the DfE register, performance from the KS4 performance tables. Progress 8 is a GCSE measure, so primaries have none. Distance is straight-line from the postcode, not a catchment: admission is decided by the school, not by us.

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.

14.6
crimes a month
161
in the last 12 months
Violence and sexual offences
most common · 52% of the total

Police.uk street-level data for LSOA E01035447, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Unwin Close

How this home sits against its street.

36
graded homes
68.4
average score
D
most common grade
-7.4
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.