137 The Round House, Gunwharf Quays, Portsmouth, PO1 3SH

UPRN:1775106331Flat/Maisonette1 bedsBuilt 2003-2006

Tenure: -Council Tax: Band AEPC: B (86)

Data freshness:Listing· freshPrice Paid· freshPlanning· 7mo agoEPC· 6mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 1mo agoArea· Census 2021

137 The Round House, Gunwharf Quays, Portsmouth, PO1 3SH

HP Score

/ 100

Strong

Verdict

yesterday

Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.
Strong fundamentals; flood risk not assessed

Evidence

18 of 21 sources

Sale Estimate

£119,000

£95k - £142kLow

Estimate

£119k

Range

£95k – £142k

Rent Estimate (pcm)

£650

£650 - £700

Monthly

£650

Yield

7.09%

Verdict

Derived from HomePortfolio scores

137 The Round House earns an INVESTIGATE rating with HP Score 76/100. Investment score 69/100 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. 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 leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

76/ 100

Strong

Investment Score

69/ 100

Moderate

Crime Score

48/ 100

Elevated

Walkability

88/ 100

Excellent

Transit & Bike

Transit 35Bike 67

Walk Score, out of 100

Opportunity

Not scored as an opportunity

We will not put a number on this one.

headline score requires valuation_edge (estimate confidence LOW below scoring floor)

What we could establish

Rental economics16.7/40
gross yield 7.1%; range width penalty ×1.00
- valuation_snapshotsrent estimate 650/mo (range 650-700)· as of 9 Oct 2026· verify before relying on this
- listing_factslisting text signals condition works - budget before trusting any yield· as of 4 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -116/mo, -18% 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
Risk & liquidity9.3/15
204 sales/12mo in area; valuation range width 39%
- property_intelligencetransactions_12mo

Withholding a score is deliberate. A number built on missing or stale inputs would look more certain than the evidence allows.

Economics

What happens to your money

Your assumptions

Purchase price£110,000

At the asking price

Monthly rent£650/mo

Evidenced range £650-£700

Interest rate5.4%

Loan to value75%

Cash required: £34,300
Net cash flow: £79/mo
Cash on cash: 2.8%
Score at this price: -

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.75 - 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_snapshotsrent estimate 650/mo (range 650-700)Rental economics · as of 9 Oct 2026 · verify before relying on this
listing_factslisting text signals condition works - budget before trusting any yieldRental economics · as of 4 Nov 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

Risks

What could kill this deal

Score confidence is low
largely a single source - treat the number as a prompt, not a conclusion
Valuation edge could not be scored
estimate confidence LOW below scoring floor
Rental economics needs verification before you rely on it
rent estimate 650/mo (range 650-700)

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. Fill the valuation edge gap before relying on the score.
estimate confidence LOW below scoring floor
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£119,000

Rent Estimate (pcm)£650

Gross Yield7.09%

1y Growth-2.8%

3y Growth-1.1%

5y Growth+1.8%

10y Growth+2.8%

Last Sold Price-

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseHigh

View Full Risk Report

Planning Activity

Recent Apps

0PO1 3SH

Approval Rate

-12mo

Development

low

26/00144/GR3
INSTALLATION OF A PERFORMANCE STRUCTURE OVER PERFORMANCE SPACE APPROVED BY PLANNING PERMISSION 25/00063/GR3
Approved
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

View Planning Timeline

Ownership

Corporate Ownership52.8%
Overseas OwnershipNo
Lease Term Remaining103 yrs
CovenantsNone
Lease Type-
Last Ownership Change-
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
0.2 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.
The Portsmouth Grammar School
0.4 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

The Round House Gunwharf Quays
-
£115k
-
The Round House Gunwharf Quays
-
£183k
-
The Round House Gunwharf Quays
-
£121k
-
The Round House Gunwharf Quays
-
£121k
-

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