The Flat, Porthouse, Upper Brook Street, Winchester, SO23 8AL

UPRN:10034500625-Beds -Built -

Tenure: -Council Tax: -EPC: -

Data freshness:Listing· freshPlanning· 3mo agoOwnership· freshRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021

The Flat, Porthouse, Upper Brook Street, Winchester, SO23 8AL

HP Score

/ 100

Mixed

Verdict

today

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

Evidence

16 of 21 sources

Sale Estimate

£285,000

£228k - £343kLow

Estimate

£285k

Range

£228k – £343k

Rent Estimate (pcm)

-- - --

Verdict

Derived from HomePortfolio scores

The Flat earns an INVESTIGATE rating with HP Score 68/100. Investment score 57/100 reflects moderate fundamentals. Crime intensity is elevated. Walkability is excellent (97/100). 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 SourcesPortal listingsMarket 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

68/ 100

Mixed

Investment Score

57/ 100

Moderate

Crime Score

68/ 100

Elevated

Walkability

97/ 100

Excellent

Transit & Bike

Transit 34Bike 64

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 economics2.2/40
gross yield 5.3% on contractual rent (listing-disclosed tenancy)
- listing_factscontractual rent 1100/mo (tenanted)· as of 7 Nov 2026
Stress margin0/30
stressed cash flow -377/mo, -34% of rent (6.75% on a 75% loan; disclosed service charge and ground rent); fails the stress - earns nothing; leasehold with no service charge disclosed - the stress assumes GBP 0
- listing_factsservice charge / ground rent from the advert· as of 7 Nov 2026· verify before relying on this
Risk & liquidity9.2/15
257 sales/12mo in area; valuation range width 40%
- property_intelligencetransactions_12mo

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

Evidence

Where every number comes from

listing_factscontractual rent 1100/mo (tenanted)Rental economics · as of 7 Nov 2026
listing_factsservice charge / ground rent from the advertStress margin · as of 7 Nov 2026 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 7 Nov 2026
property_intelligencetransactions_12moRisk & liquidity

Sold comparables in depth Valuation methodology

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
Stress margin needs verification before you rely on it
service charge / ground rent from the advert

Plan

Before you offer

1. Ask the agent why the price was reduced and whether a previous sale fell through.
2 price cut(s) recorded on the listing history.
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£285,000

Rent Estimate (pcm)-

Gross Yield-

1y Growth-

3y Growth-3.1%

5y Growth-1.1%

10y Growth+1.9%

Last Sold Price-

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceLow
RadonLow
MiningLow
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0SO23 8AL

Approval Rate

-12mo

Development

low

26/02287/HOU
A single storey rear extension
Pending
26/02290/TPC
T1 & T2- Ash Trees. Permission to fell to ground level. The pair of trees have very poor form and asthetic value, and are also in very close proximity to the wall, with potential to cause damage. Signs of dieback have also been exhibited over the past 2 years, and there is a very busy road beneath the trees.
Pending
26/02291/TPC
T1 Sycamore - Crown lift to clear highway for bin lorries to avoid damage T2 Hazel - Remove tree growing up through Sycamore T3 & T4 Prunus - Reduce overhanging branches by 1m to clear garden T5 Prunus - Remove diseased & decayed tree above shed. Bracket at base, decayed main stem
Pending

View Planning Timeline

Ownership

Corporate Ownership52.4%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsRestrictive
Lease Type-
Last Ownership Change-
SourceLand Registry

View Ownership Details

Connectivity

Broadband (-)

Mobile 4G/5G Coverage

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£38,352

Population Density8,068 /km²

Owner Occupied36%

Age Distribution

0-15 8%16-64 76%65+ 16%

View Area Profile

Schools Nearby

Swanwick Lodge
0.2 mi
-
St Bede Church of England Primary School
0.2 mi
Area grades2024
Inspected after Ofsted withdrew the single overall grade.
The Pilgrims School
0.3 mi
Inspected by ISI
Winchester College
0.4 mi
Inspected by ISI

1 of 8 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

Vodka Bar & Nightclub Upper Brook Street
-
£1.14M
-
17 Upper Brook Street
-
£212k
-
19 Upper Brook Street
-
£155k
-
17 Upper Brook Street
-
£200k
-

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