Flat 19, 55 Portland Place, London, W1B 1QL

UPRN:100022792012Flat/Maisonette4 bedsBuilt -

Tenure: -Council Tax: Band GEPC: -

Data freshness:Listing· freshPrice Paid· freshPlanning· 4mo agoRisk· 5mo agoConnectivity· 1mo agoAmenities· 1mo agoArea· Census 2021

Flat 19, 55 Portland Place, London, W1B 1QL

HP Score

/ 100

Strong

Verdict

3 days ago

Verdict: AVOID, on a scale of Buy, Investigate, Avoid.
Significant risk factors

Evidence

17 of 21 sources

Sale Estimate

£528,000

£422k - £634kLow

Estimate

£528k

Range

£422k – £634k

Rent Estimate (pcm)

£2,300

£2k - £3k

Monthly

£2,300

Yield

6.90%

Verdict

Derived from HomePortfolio scores

Flat 19 earns an AVOID rating with HP Score 79/100. Investment score 64/100 reflects moderate fundamentals. Crime intensity is moderate. Walkability is excellent (99/100). 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 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

79/ 100

Strong

Investment Score

64/ 100

Moderate

Crime Score

37/ 100

Elevated

Walkability

99/ 100

Excellent

Transit & Bike

Transit 91Bike 72

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 economics13/40
gross yield 6.9%; range width penalty ×0.85; the estimate this rent rides on sits 24% above the ask - check the rent describes the advertised home
- valuation_snapshotsrent estimate 2300/mo (range 2100-2500)· as of 10 Oct 2026· verify before relying on this
- valuation_snapshotssale estimate 24% above the ask on the same snapshot - verify the rent describes this home· as of 10 Oct 2026· verify before relying on this
- listing_factslisting text signals condition works - budget before trusting any yield· as of 30 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -1,762/mo, -77% 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 30 Oct 2026
Risk & liquidity3.1/15
8 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.

Economics

What happens to your money

Your assumptions

Purchase price£400,000

At the asking price

Monthly rent£2,300/mo

Evidenced range £2,100-£2,500

Interest rate5.4%

Loan to value75%

Cash required: £131,300
Net cash flow: £242/mo
Cash on cash: 2.2%
Score at this price: -

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.70 - 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 2300/mo (range 2100-2500)Rental economics · as of 10 Oct 2026 · verify before relying on this
valuation_snapshotssale estimate 24% above the ask on the same snapshot - verify the rent describes this homeRental economics · as of 10 Oct 2026 · verify before relying on this
listing_factslisting text signals condition works - budget before trusting any yieldRental economics · as of 30 Oct 2026 · verify before relying on this
listing_factsservice charge / ground rent from the advertStress margin · as of 30 Oct 2026
portal_listingsprice_changes + first_published_date

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 2300/mo (range 2100-2500)

Plan

Before you offer

1. Get two written rental appraisals from local lettings agents.
The market estimate this rent rides on sits far above the asking price, so the rent may describe a different home.
2. Ask the agent why the price was reduced and whether a previous sale fell through.
2 price cut(s) recorded on the listing history.
3. Fill the valuation edge gap before relying on the score.
estimate confidence LOW below scoring floor
4. 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£528,000

Rent Estimate (pcm)£2,300

Gross Yield6.90%

1y Growth-

3y Growth-6.5%

5y Growth-2.5%

10y Growth+1.1%

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

0W1B 1QL

Approval Rate

-12mo

Development

low

2026/4773/L
Internal refurbishment and reconfiguration of wings 1.3 and 1.4; associated works on the first, second and third floors to improve the laboratory environments and associated spaces; and relocation of the partitions in the central stairwell.
Pending
26/07290/CLEUD
Confirmation that digging of trench to contain part of foundations is lawful and that planning permission 23/03464/FULL dated 30 October 2023 commenced before expiry of the three year time period.
Pending
26/07264/ADFULL
Details of the Validation Report pursuant to Condition 16 (Phase 4) of planning permission dated 10 November 2025 (RN: 25/02820/FULL).
Pending

View Planning Timeline

Ownership

Corporate Ownership11%
Overseas OwnershipNo
Lease Term Remaining8 yrs
CovenantsNone
Lease Type-
Last Ownership Change-
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 Density5,839 /km²

Owner Occupied46%

Age Distribution

0-15 12%16-64 69%65+ 19%

View Area Profile

Schools Nearby

Southbank International School Westminster
0.1 mi
Inspected by ISI
Eifa International School
0.2 mi
Good
The St Marylebone CofE School
0.2 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.
Royal Academy of Music
0.2 mi
-

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

View All Schools

Comparables

View All

55 Portland Place
-
£5.71M
-
53 - 57 Portland Place
-
£2.05M
-
55 Portland Place
-
£2.60M
-
55 Portland Place
-
£4.74M
-

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