20 Walnut Grove, Southampton SO16 4NJ

Semi-Detached house · Built 1930-1949 · 99 m² · Owner-Occupied · Air source heat pump, radiators, electric

Upgrade Plan

Get upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Flat roof insulation(optional, beyond B)£900 – £1,200£1099.6 yrs+2.2 pts
Floor insulation(optional, beyond B)£5,000 – £10,000£14450+ yrs+2.8 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

£1,526
per year at grade B
£1,273
per year at grade B

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

Sold prices

8 February 2013£175,000
3 February 2004£158,500
20 July 2001£115,000
16 May 1997£41,250

Estimated today: £306,018 HPI-indexed estimate, not a valuation

Walnut Grove: 69 sales since 1995 · £193,676 average over 10 years

Schools nearby

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

SchoolPhaseDistanceProgress
Mason Moor Primary School, Nursery & Specialist BasesPrimary0.3 mi
Newlands Primary SchoolPrimary0.4 mi
Shirley Warren Primary & Nursery SchoolPrimary0.5 mi
Regents Park Community CollegeSecondary0.4 miNot in the KS4 performance tables
Redbridge Community SchoolSecondary0.8 miProgress 8 -0.99 · well below average (2023/24)
Upper Shirley High SchoolSecondary1.1 miProgress 8 +0.09 · 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.

14.2
crimes a month
156
in the last 12 months
Violence and sexual offences
most common · 54% of the total

Police.uk street-level data for LSOA E01017208, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Walnut Grove

How this home sits against its street.

31
graded homes
62
average score
D
most common grade
+19.0
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.