21 Windbury Road, Southampton, SO16 9NP

UPRN:100060744407Terrace Property3 bedsBuilt 1930-1949

FreeholdCouncil Tax: Band BEPC: B (84)

Data freshness:Listing· freshPlanning· 4mo agoOwnership· freshEPC· 5mo agoRisk· 5mo agoCrime· freshConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021Council Tax· 1mo ago

HP Score

/ 100

Mixed

Verdict

yesterday

Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.
Mixed signals - investigate

Evidence

19 of 21 sources

Sale Estimate

£248,000

£236k - £260kHigh

Estimate

£248k

Range

£236k – £260k

Rent Estimate (pcm)

£1,450

£1k - £2k

Monthly

£1,450

Yield

7.25%

Verdict

Derived from HomePortfolio scores

21 Windbury Road earns an INVESTIGATE rating with HP Score 67/100. Investment score 56/100 reflects moderate fundamentals. Crime intensity is moderate. Walkability is limited (59/100). Flood risk is not assessed: check the Environment Agency long-term flood map before offering. Tenure is freehold. Every figure here comes from the live HomePortfolio API; anything it does not publish is left out.

Key SourcesEPC RegisterPortal listingsOfcom Connected NationsOfcom mobile coverageMarket estimates (third-party AVM)Defra strategic noise mapping, England Round 4 (Contains Defra data © Crown copyright and database right 2023-2024, Open Government Licence v3.0)Walk ScoreONS Census 2021Police.ukHM Land Registry company ownershipHM Land Registry covenantsHM Land Registry leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

67/ 100

Mixed

Investment Score

56/ 100

Moderate

Crime Score

36/ 100

Elevated

Walkability

59/ 100

Moderate

Transit & Bike

Transit 19Bike 60

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Reduced confidence2 independent sourcesListing checked 10 Nov 2026

Fewer independent sources agree, or a component could not be scored.

Valuation edge2.5/15
claims [AVM +3.2% (HIGH), sold-comps +25.2%, £/sqft +25.2%] → measured edge +0.50pp of the ask; on later-registered sales an AVM discount carried no edge and a sold-evidence gap at most +0.5pp
Market estimate used (HIGH confidence) · snapshot 9 Nov 2026
- valuation_snapshotsestimate for 100060744407· as of 9 Nov 2026
- property_comparablessold-evidence family (implied value + £/sqft): 9 comps, dispersion 12.9%· as of 23 Oct 2026
Rental economics17.9/40
gross yield 7.2%; range width penalty ×0.99
- valuation_snapshotsrent estimate 1450/mo (range 1350-1500)· as of 9 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -77/mo, -5% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); fails the stress - earns nothing
- underwriting_assumptionscosts not disclosed by the advert· as of 10 Nov 2026
Seller motivationNot scored
context, not scored: 1 price cut(s), unknown days on market; homes with a cut sold 0.2-0.3pp further below the cut ask, which is not an edge
- portal_listingsprice_changes + first_published_date· as of 10 Nov 2026
Risk & liquidity14.7/15
541 sales/12mo in area; valuation range width 10%
- property_intelligencetransactions_12mo

4 of 4 components scored. Ranks on gross yield, the stress margin, risk and disclosed facts. A pricing claim earns only its measured edge: today 0 for the market estimate and at most +0.5pp for sold evidence. The score itself is not yet checked against the outcomes of homes it scored.

Economics

What happens to your money

Price sensitivity

£180,000£276,000

The same scorer re-run at hypothetical asking prices, holding rent, comps and listing history constant. Not a prediction of what the seller would accept.

Your assumptions

Purchase price£240,000

At the asking price

Monthly rent£1,450/mo

Evidenced range £1,350-£1,500

Interest rate5.4%

Loan to value75%

Cash required: £75,600
Net cash flow: £194/mo
Cash on cash: 3.1%
Score at this price: 35

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.79 - clears the usual 1.25 test. These are your assumptions, not evidence: only the pre-filled rent and price come from the record.

Evidence

Where every number comes from

valuation_snapshotsestimate for 100060744407Valuation edge · as of 9 Nov 2026
property_comparablessold-evidence family (implied value + £/sqft): 9 comps, dispersion 12.9%Valuation edge · as of 23 Oct 2026
valuation_snapshotsrent estimate 1450/mo (range 1350-1500)Rental economics · as of 9 Nov 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 10 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 10 Nov 2026

Risks

What could kill this deal

Score confidence is reduced
fewer independent sources agree, or a component could not be scored
Rental economics needs verification before you rely on it
rent estimate 1450/mo (range 1350-1500)
Seller motivation could not be scored
context, not scored: 1 price cut(s), unknown days on market; homes with a cut sold 0.2-0.3pp further below the cut ask, which is not an edge

Property risk deep-dive →

Plan

Before you offer

1. Get two written rental appraisals from local lettings agents.
The rent estimate rests on area-level evidence, not lettings on this street.
2. Ask the agent why the price was reduced and whether a previous sale fell through.
1 price cut(s) recorded on the listing history.
3. Treat the gap to the estimate as unproven - compare recent sold prices on the street yourself before pricing an offer around it.
On later completions, homes listed below their estimate sold at the same share of the asking price as the rest.
4. Commission a full structural survey, not a basic condition report.
The score prices market evidence, not the fabric of the building.

Valuation & Market

Sale Estimate£248,000

Rent Estimate (pcm)£1,450

Gross Yield7.25%

1y Growth-

3y Growth+1.9%

5y Growth+2.8%

10y Growth+3.8%

Last Sold Price-

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0SO16 9NP

Approval Rate

-12mo

Development

low

26/01179/PLDC
Application for a lawful development certificate for a proposed erection of a single-storey rear extension.
Pending
26/01171/ELDC
Application for a lawful development certificate for the existing use as a house in multiple occupation (HMO, Class C4).
Pending
26/02037/FULLS
Installation of three rapid electric vehicle charging stations and ancillary equipment within the car park of Costa Coffee
Pending

View Planning Timeline

Ownership

Corporate Ownership54.7%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsRestrictive
Lease TypeFreehold
Last Ownership Change-
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

4 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£32,907

Population Density-

Owner Occupied53%

Age Distribution

0-15 23%16-64 64%65+ 13%

View Area Profile

Schools Nearby

Compass School
0.3 mi
GoodConcerns
Oasis Academy Lord's Hill
0.3 mi
Inadequate
Mansel Park Primary & Nursery School - Part of the Learning Federation Partnership of Schools
0.3 mi
Inspected as Mansel Junior School (URN 116120) on 28 Jun 2006
Holy Family Catholic Primary School - Part of the Learning Federation Partnership of Schools
0.3 mi
-

4 of 12 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

27 Windbury Road
-
£250k
-
43 Windbury Road
-
£238k
-
37 Windbury Road
-
£245k
-
1 Windbury Road
-
£283k
-

Boundary data not available for this property

No registered title polygon, building footprint, or street match for this property yet.

Why: No HMLR INSPIRE / OSM footprint / OS Open USRN match for this UPRN

Source: HM Land Registry INSPIRE / OpenStreetMap / OS Open USRN