20 The Vulcan, Gunwharf Quays, Portsmouth, PO1 3BF

UPRN:1775105402Flat/Maisonette2 bedsBuilt before 1900

LeaseholdCouncil Tax: Band EEPC: F (37)

Data freshness:Listing· freshPlanning· 7mo agoOwnership· 1mo agoEPC· 3mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021Council Tax· 1mo ago

20 The Vulcan, Gunwharf Quays, Portsmouth, PO1 3BF

HP Score

/ 100

Mixed

Verdict

yesterday

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

Evidence

20 of 21 sources

Sale Estimate

£398,000

£378k - £418kHigh

Estimate

£398k

Range

£378k – £418k

Rent Estimate (pcm)

£2,250

£2k - £2k

Monthly

£2,250

Yield

6.75%

Verdict

Derived from HomePortfolio scores

20 The Vulcan earns an INVESTIGATE rating with HP Score 71/100. Investment score 58/100 reflects moderate fundamentals. Crime intensity is moderate. Walkability is good (80/100). 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

71/ 100

Mixed

Investment Score

58/ 100

Moderate

Crime Score

48/ 100

Elevated

Walkability

80/ 100

High

Transit & Bike

Transit 30Bike 65

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 4 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 -0.5% (HIGH)] → 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 (HIGH confidence) · snapshot 9 Nov 2026
- valuation_snapshotsestimate for 1775105402· as of 9 Nov 2026
Rental economics13.7/40
gross yield 6.8%; range width penalty ×0.98
- valuation_snapshotsrent estimate 2250/mo (range 2100-2350)· as of 9 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -552/mo, -25% 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 4 Nov 2026
Seller motivationNot scored
context, not scored: 1 price cut(s), 123 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 4 Nov 2026
Risk & liquidity14.6/15
204 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

£300,000£460,000

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£400,000

At the asking price

Monthly rent£2,250/mo

Evidenced range £2,100-£2,350

Interest rate5.4%

Loan to value75%

Cash required: £131,300
Net cash flow: £208/mo
Cash on cash: 1.9%
Score at this price: 28

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.67 - 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 1775105402Valuation edge · as of 9 Nov 2026
valuation_snapshotsrent estimate 2250/mo (range 2100-2350)Rental economics · as of 9 Nov 2026 · verify before relying on this
listing_factsservice charge / ground rent from the advertStress margin · as of 4 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 4 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 2250/mo (range 2100-2350)
Seller motivation could not be scored
context, not scored: 1 price cut(s), 123 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. Commission a full structural survey, not a basic condition report.
The score prices market evidence, not the fabric of the building.

Every step above was generated from a specific gap or flag in the evidence - no generic advice, no invented tasks.

Valuation & Market

Sale Estimate£398,000

Rent Estimate (pcm)£2,250

Gross Yield6.75%

1y Growth-

3y Growth-1.1%

5y Growth+1.8%

10y Growth+2.8%

Last Sold Price£369,300 (2005-10-07)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0PO1 3BF

Approval Rate

-12mo

Development

low

26/00309/FULL
ERECTION OF EXTENSION TO FORM TWO ADDITIONAL FLOORS TO BUILDING, RETENTION OF GROUND-FLOOR COMMERCIAL UNIT (CLASS E) AND USE OF THE REMAINDER OF THE BUILDING AS A 17-BEDROOM (21-PERSON) HOUSE IN MULTIPLE OCCUPATION (HMO) (SUI GENERIS), INCLUDING ASSOCIATED ALTERATIONS (CONSERVATION AREA) (ALTERNATIVE SCHEME TO PLANNING PERMISSION 26/00122/FULL)
Pending
26/00299/FULL
INSTALLATION OF COMBINED DEFIBRILLATOR AND BLEED KIT CABINET TO SIDE OF SHOPFRONT (CONSERVATION AREA)
Pending
26/00229/FULL
ERECTION OF 2NO. REPLACEMENT GARDEN BUILDINGS, PHOTOVOLTAIC PANELS TO THE ROOF OF THE EXISTING BUILDING AND NEW EXTERNAL AIR CONDITIONING UNITS (CONSERVATION AREA)
Approved

View Planning Timeline

Ownership

Corporate Ownership52.8%
Overseas OwnershipNo
Lease Term Remaining171 yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2005-10-07
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

16 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£30,962

Population Density5,857 /km²

Owner Occupied42%

Age Distribution

0-15 7%16-64 69%65+ 24%

View Area Profile

Schools Nearby

St George's Beneficial Church of England (Voluntary Controlled) Primary School
0.3 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.
The Portsmouth Grammar School
0.4 mi
Inspected by ISI
St Jude's CofE Primary School
0.5 mi
GoodConcerns
University of Portsmouth
0.5 mi
-

2 of 10 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

The Vulcan Gunwharf Quays
-
£370k
-
The Vulcan Gunwharf Quays
-
£335k
-
The Vulcan Gunwharf Quays
-
£365k
-
The Vulcan Gunwharf Quays
-
£375k
-

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