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

UPRN:100022791995Flat/MaisonetteBeds -Built 1930-1949

Tenure: -Council Tax: Band HEPC: C (69)

Data freshness:Planning· 4mo agoOwnership· freshEPC· 1mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021Council Tax· 1mo ago

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

HP Score

/ 100

Strong

Verdict

today

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

Evidence

19 of 21 sources

Sale Estimate

£3,770,000

£3.02M - £4.52MLow

Estimate

£3.77M

Range

£3.02M – £4.52M

Rent Estimate (pcm)

£16,050

£15k - £17k

Monthly

£16,050

Yield

3.50%

Verdict

Derived from HomePortfolio scores

Flat 1 earns an INVESTIGATE rating with HP Score 81/100. Investment score 71/100 reflects strong 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 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

81/ 100

Strong

Investment Score

71/ 100

High

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.

asking price missing or outside scoring range

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£5,500,000

At the asking price

Monthly rent£16,050/mo

Evidenced range £14,700-£17,350

Interest rate5.4%

Loan to value75%

Cash required: £2,225,050
Net cash flow: -£7,451/mo
Cash on cash: -4.0%
Score at this price: -

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 0.86 - below the usual 1.25 test. These are your assumptions, not evidence: only the pre-filled rent and price come from the record.

Risks

What could kill this deal

Score confidence is low
largely a single source - treat the number as a prompt, not a conclusion

Property risk deep-dive →flood, subsidence, crime, environment - the full domain

Plan

Before you offer

1. 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£3,770,000

Rent Estimate (pcm)£16,050

Gross Yield3.50%

1y Growth-

3y Growth-6.5%

5y Growth-2.5%

10y Growth+1.1%

Last Sold Price£2,050,000 (2021-09-06)

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

2026/4882/T
(TPO REF: C5-T8) REAR GARDEN: 1 x Tree of Heaven (Ailanthus altissima) (T74) - Pollard previous points - back to the most recent, previous pollard points, removing around 5m of extended regrowth, to reduce loading and continue established management, maintaining the crown volume within reasonable proportions for the location.
Pending
2026/4896/P
Details to discharge condition 4 (details of the acoustic enclosures) of planning permission 2024/3914/P granted 16/01/2025 for the 'Full replacement of the building mechanical, electrical and plumbing (MEP) services installation, to include: heating and cooling apparatus, replacement of soil pipes and re-routing of services ductwork'.
Pending
2026/4885/P
Non-material amendments to planning permission ref. 2024/4840/P dated 20 August 2025 for commercial refurbishment and extension of the building, to amend the wording of Condition 15 (Green Roof Details).
Pending

View Planning Timeline

Ownership

Corporate Ownership10.8%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsNone
Lease Type-
Last Ownership Change2021-09-06
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£45,172

Population Density-

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