Flat 4A, Stone House, 9 Weymouth Street, London, W1W 6DB

UPRN:100022819686Flat/Maisonette2 bedsBuilt before 1900

LeaseholdCouncil Tax: -EPC: C (69)

Data freshness:Listing· freshPlanning· 3mo agoOwnership· freshEPC· 6mo agoRisk· 5mo agoCrime· freshConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021

Flat 4A, Stone House, 9 Weymouth Street, London, W1W 6DB

HP Score

/ 100

Strong

Verdict

yesterday

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

Evidence

20 of 21 sources

Sale Estimate

£1,274,000

£1.21M - £1.34MHigh

Estimate

£1.27M

Range

£1.21M – £1.34M

Rent Estimate (pcm)

£6,350

£6k - £7k

Monthly

£6,350

Yield

5.86%

Verdict

Derived from HomePortfolio scores

Flat 4A earns an INVESTIGATE rating with HP Score 77/100. Investment score 73/100 reflects strong fundamentals. Crime intensity is moderate. Walkability is excellent (100/100). 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

77/ 100

Strong

Investment Score

73/ 100

High

Crime Score

58/ 100

Elevated

100

Walkability

100/ 100

Excellent

Transit & Bike

Transit 100Bike 69

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 13 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 -2.0% (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 31 Oct 2026
- valuation_snapshotsestimate for 100022819686· as of 31 Oct 2026
Rental economics6/40
gross yield 5.9%; range width penalty ×0.87
- valuation_snapshotsrent estimate 6350/mo (range 5800-6850)· as of 31 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -947/mo, -15% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); fails the stress - earns nothing
- underwriting_assumptionscosts not disclosed by the advert· as of 13 Nov 2026
Seller motivationNot scored
context, not scored: 1 price cut(s), unknown 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 13 Nov 2026
Risk & liquidity14.6/15
33 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

£975,000£1,495,000

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£1,300,000

At the asking price

Monthly rent£6,350/mo

Evidenced range £5,800-£6,850

Interest rate5.4%

Loan to value75%

Cash required: £465,050
Net cash flow: £9/mo
Cash on cash: 0.0%
Score at this price: 21

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.45 - 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 100022819686Valuation edge · as of 31 Oct 2026
valuation_snapshotsrent estimate 6350/mo (range 5800-6850)Rental economics · as of 31 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 13 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 13 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 6350/mo (range 5800-6850)
Seller motivation could not be scored
context, not scored: 1 price cut(s), unknown 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£1,274,000

Rent Estimate (pcm)£6,350

Gross Yield5.86%

1y Growth-

3y Growth-6.6%

5y Growth-0.8%

10y Growth-3.2%

Last Sold Price£1,350,000 (2016-09-28)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

1W1W 6DB

Approval Rate

100%12mo

Development

low

26/07564/LBC
Repair and restoration works to the Art Deco wing of Claridge's Hotel, including repairs to brickwork, stonework, balconies, rainwater goods, windows and associated architectural features; replacement and reinstatement of missing and damaged elements including balustrades, stone corbels and rainwater goods; repairs associated with corrosion of the underlying structural frame; cleaning and decoration of external elevations; and all associated works.
Pending
26/07540/ADFULL
Details of a method statement explaining the measures you will take to protect the trees on and close to the site (in consultation with TfL) pursuant to condition 3 of planning permission dated 11th June 2026 (RN:26/02173/FULL)
Pending
26/07536/ADV
Display of an internally illuminated hangign sign measuting 0.35m x 0.50m.
Pending

View Planning Timeline

Ownership

Corporate Ownership15.3%
Overseas OwnershipNo
Lease Term Remaining85 yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2016-09-28
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

17 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£45,172

Population Density-

Owner Occupied33%

Age Distribution

0-15 12%16-64 73%65+ 15%

View Area Profile

Schools Nearby

Southbank International School Westminster
0.0 mi
Inspected by ISI
Eifa International School
0.1 mi
Good
Queen's College, London
0.2 mi
Inspected by ISI
The St Marylebone CofE School
0.3 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.

2 of 5 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

Stone House, 9 Weymouth Street
-
£685k
-
Stone House, 9 Weymouth Street
-
£1.60M
-
Stone House, 9 Weymouth Street
-
£2.50M
-
Stone House, 9 Weymouth Street
-
£1.74M
-

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