3 Bosun Court, High Street, Cosham, Portsmouth, PO6 3EG

UPRN:1775101305Flat/Maisonette1 bedsBuilt 1996-2002

LeaseholdCouncil Tax: -EPC: C (80)

Data freshness:Listing· freshPlanning· 4mo agoEPC· 3mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021

3 Bosun Court, High Street, Cosham, Portsmouth, PO6 3EG

HP Score

/ 100

Mixed

Verdict

3 days ago

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

Evidence

20 of 21 sources

Sale Estimate

£147,000

£132k - £162kMedium

Estimate

£147k

Range

£132k – £162k

Rent Estimate (pcm)

£800

£750 - £850

Monthly

£800

Yield

6.86%

Verdict

Derived from HomePortfolio scores

3 Bosun Court earns an INVESTIGATE rating with HP Score 57/100. Investment score 60/100 reflects moderate fundamentals. Crime intensity is elevated. Walkability is excellent (89/100). Flood risk is not assessed: check the Environment Agency long-term flood map before offering. Tenure is leasehold. 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)HM Land Registry sales matched to addressDefra 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

57/ 100

Mixed

Investment Score

60/ 100

Moderate

100

Crime Score

100/ 100

Elevated

Walkability

89/ 100

Excellent

Transit & Bike

Transit 37Bike 69

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 3 Nov 2026

This rests largely on a single source. Treat the score as a prompt to investigate, not a conclusion.

Valuation edge0/15
claims [AVM +4.8% (MEDIUM)] → measured edge +0.00pp 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 (MEDIUM confidence) · snapshot 9 Oct 2026
- valuation_snapshotsestimate for 1775101305· as of 9 Oct 2026
Rental economics14.1/40
gross yield 6.9%; range width penalty ×0.95
- valuation_snapshotsrent estimate 800/mo (range 750-850)· as of 9 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -278/mo, -35% of rent (6.75% on a 75% loan; disclosed service charge and ground rent); fails the stress - earns nothing
- listing_factsservice charge / ground rent from the advert· as of 3 Nov 2026
Seller motivationNot scored
context, not scored: 1 price cut(s), 187 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 3 Nov 2026
Risk & liquidity12.8/15
349 sales/12mo in area; valuation range width 20%
- 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

£105,000£161,000

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£140,000

At the asking price

Monthly rent£800/mo

Evidenced range £750-£850

Interest rate5.4%

Loan to value75%

Cash required: £43,600
Net cash flow: £81/mo
Cash on cash: 2.2%
Score at this price: 27

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.69 - 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 1775101305Valuation edge · as of 9 Oct 2026
valuation_snapshotsrent estimate 800/mo (range 750-850)Rental economics · as of 9 Oct 2026 · verify before relying on this
listing_factsservice charge / ground rent from the advertStress margin · as of 3 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 3 Nov 2026
property_intelligencetransactions_12moRisk & liquidity

Sold comparables in depth

Risks

What could kill this deal

Score confidence is low
largely a single source - treat the number as a prompt, not a conclusion
Rental economics needs verification before you rely on it
rent estimate 800/mo (range 750-850)
Seller motivation could not be scored
context, not scored: 1 price cut(s), 187 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£147,000

Rent Estimate (pcm)£800

Gross Yield6.86%

1y Growth-

3y Growth-0.8%

5y Growth+1.8%

10y Growth+2.4%

Last Sold Price£101,000 (2003-12-19)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningLow
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0PO6 3EG

Approval Rate

-12mo

Development

low

26/00447/CPL
Application for Certificate of Lawful Development for the proposed alterations to roof to include hip to gable buildup, construction of flat-roof dormer windows to rear roofslopes and roof-lights to front roofslopes
Pending
26/00410/DOC
Application to discharge conditions 3 (Materials), 7 (Sound Insulation) and 10 (CEMP) of planning permission 21/01774/FUL
Pending
26/00399/HOU
Construction of single storey rear extension with raised decking area and alterations to roof include hip to gable buildup and dormer windows to rear roofslopes
Pending

View Planning Timeline

Ownership

Corporate Ownership54.5%
Overseas OwnershipNo
Lease Term Remaining75 yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2003-12-19
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

18 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£30,962

Population Density2,667 /km²

Owner Occupied34%

Age Distribution

0-15 25%16-64 64%65+ 11%

View Area Profile

Schools Nearby

Medina Primary School
0.3 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.
Portsdown Primary School
0.3 mi
Good
Court Lane Junior Academy
0.4 mi
Good
Court Lane Infant Academy
0.4 mi
Good

2 of 9 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

Bosun Court High Street
-
£143k
-
Bosun Court High Street
-
£120k
-
Bosun Court High Street
-
£140k
-
Bosun Court High Street
-
£122k
-

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