Flat 23, No 1, Gunwharf Quays, Portsmouth, PO1 3FR

UPRN:1775112976Flat/MaisonetteBeds -Built 2007-2011

LeaseholdCouncil Tax: -EPC: B (81)

Data freshness:Listing· freshPrice Paid· freshPlanning· 7mo agoEPC· 3mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 1mo agoArea· Census 2021

Flat 23, No 1, Gunwharf Quays, Portsmouth, PO1 3FR

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

£548,000

£520k - £575kHigh

Estimate

£548k

Range

£520k – £575k

Rent Estimate (pcm)

£3,100

£3k - £3k

Monthly

£3,100

Yield

6.76%

Verdict

Derived from HomePortfolio scores

Flat 23 earns an INVESTIGATE rating with HP Score 73/100. Investment score 59/100 reflects moderate fundamentals. Crime intensity is moderate. Walkability is excellent (88/100). 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 leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

73/ 100

Mixed

Investment Score

59/ 100

Moderate

Crime Score

48/ 100

Elevated

Walkability

88/ 100

Excellent

Transit & Bike

Transit 34Bike 67

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesLead to verifyListing checked 4 Nov 2026

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

Check before relying on this score: leasehold with no service charge disclosed - the stress test assumes GBP 0. It ranks after every home whose inputs are verified.

Valuation edge0/15
claims [AVM -0.4% (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 13 Oct 2026
- valuation_snapshotsestimate for 1775112976· as of 13 Oct 2026
Rental economics13.3/40
gross yield 6.8%; range width penalty ×0.94
- valuation_snapshotsrent estimate 3100/mo (range 2900-3300)· as of 13 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -172/mo, -6% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); fails the stress - earns nothing; leasehold with no service charge disclosed - the stress assumes GBP 0
- underwriting_assumptionscosts not disclosed by the advert· as of 4 Nov 2026· verify before relying on this
Seller motivationNot scored
context, not scored: 0 price cut(s), 112 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

£412,500£632,500

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£550,000

At the asking price

Monthly rent£3,100/mo

Evidenced range £2,900-£3,300

Interest rate5.4%

Loan to value75%

Cash required: £183,800
Net cash flow: £290/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 1775112976Valuation edge · as of 13 Oct 2026
valuation_snapshotsrent estimate 3100/mo (range 2900-3300)Rental economics · as of 13 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 4 Nov 2026 · verify before relying on this
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 3100/mo (range 2900-3300)
Stress margin needs verification before you rely on it
costs not disclosed by the advert

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. 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£548,000

Rent Estimate (pcm)£3,100

Gross Yield6.76%

1y Growth-

3y Growth-1.1%

5y Growth+1.8%

10y Growth+2.8%

Last Sold Price£400,000 (2008-05-29)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0PO1 3FR

Approval Rate

-12mo

Development

low

26/00432/NMA
Application for non-material amendment to planning permission 25/00841/FUL to seek approval of amended plans relating to external alterations
Approved
26/00422/DOC
Application to part discharge condition 14(i) (Piling Method Statement) of planning permission 25/00973/FUL
Pending
26/00411/FUL
Sub-division of existing Class E building to provide two commercial units at ground floor level, retention of the first floor office, and the creation of 1no. self-contained residential dwelling (Class C3) at second floor level.
Pending

View Planning Timeline

Ownership

Corporate Ownership52.8%
Overseas OwnershipNo
Lease Term Remaining176 yrs
CovenantsNone
Lease TypeLeasehold
Last Ownership Change2008-05-29
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 Density-

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
0.2 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.
The Portsmouth Grammar School
0.3 mi
Inspected by ISI
University of Portsmouth
0.4 mi
-
St Jude's CofE Primary School
0.5 mi
GoodConcerns

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

View All Schools

Comparables

View All

1 Gunwharf Quays
-
£170k
-
1 Gunwharf Quays
-
£300k
-
1 Gunwharf Quays
-
£318k
-
1 Gunwharf Quays
-
£364k
-

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