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Penthouse D, 15 Portman Square, London, W1H 6LJ

UPRN:100022792285Flat/Maisonette3 bedsBuilt 1930-1949
LeaseholdCouncil Tax: Band HEPC: E (52)
Data freshness:Ownership· freshOwnership: fresh, refreshed 5d ago (2026-11-10T13:33:30.793547+00:00)EPC· 6mo agoEPC: stale, refreshed 6mo ago (2026-05-20T10:58:39.129138+00:00)Risk· 5mo agoRisk: stale, refreshed 5mo ago (2026-06-18T00:00:00+00:00)Crime· freshCrime: fresh, refreshed 4d ago (2026-11-11T13:01:03.839912+00:00)Connectivity· 1mo agoConnectivity: ageing, refreshed 1mo ago (2026-10-03T06:43:10.905825+00:00)Schools· 1mo agoSchools: ageing, refreshed 1mo ago (2026-10-06T05:00:30.533230+00:00)Amenities· 2mo agoAmenities: ageing, refreshed 2mo ago (2026-09-23T00:00:00+00:00)Area· Census 2021Area: static reference data (Census 2021); authoritative and does not refreshCouncil Tax· 1mo agoCouncil Tax: ageing, refreshed 1mo ago (2026-10-11T11:59:18.012763+00:00)
Penthouse D, 15 Portman Square, London, W1H 6LJ

HP Score

Mixed
Verdict
4 days ago
  • Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.

    Mixed signals - investigate

Evidence
19 of 21 sources
Sale Estimate
£4,930,000
£3.94M - £5.92MLow
Estimate
£4.93M
Range
£3.94M – £5.92M
Rent Estimate (pcm)
£21,050
£19k - £23k
Monthly
£21,050
Yield
5.12%

Verdict

Derived from HomePortfolio scores

Penthouse D earns an INVESTIGATE rating with HP Score 61/100. Investment score 54/100 reflects moderate fundamentals. Crime intensity is elevated. 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)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
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HP Score
61/ 100
Mixed
Investment Score
54/ 100
Moderate
Crime Score
100/ 100
Elevated
Walkability
100/ 100
Excellent
Transit & Bike
Transit 94Bike 71
Walk Score, out of 100

Valuation & Market

Sale Estimate£4,930,000
Rent Estimate (pcm)£21,050
Gross Yield5.12%
1y Growth+8300.0%
3y Growth-11.2%
5y Growth-4.7%
10y Growth-0.9%
Last Sold Price-
View Market Details

Risk Overview

  • Flood RiskUnknown
  • SubsidenceSignificant
  • RadonLow
  • MiningUnknown
  • LandslideLow
  • Air QualityLow
  • NoiseLow
View Full Risk Report

Planning Activity

Recent Apps
2W1H 6LJ
Approval Rate
-12mo
Development
low
  • 26/07581/FULL
    External and internal alterations, including replacement of the existing roof extension with a dummy mansard incorporating a false sash; demolition and rebuilding of the rear outrigger; creation of terraces at lower ground, ground and first-floor levels with associated planting and privacy screening; installation of three enclosed condenser units at first-floor terrace level; and internal alterations including changes to the plan form, replacement fittings and doors, and installation of fan coil units. (Linked to 26/07582/LBC)
    Pending
  • 26/07582/LBC
    External and internal alterations, including replacement of the existing roof extension with a dummy mansard incorporating a false sash; demolition and rebuilding of the rear outrigger; creation of terraces at lower ground, ground and first-floor levels with associated planting and privacy screening; installation of three enclosed condenser units at first-floor terrace level; and internal alterations including changes to the plan form, replacement fittings and doors, and installation of fan coil units. (Linked to 26/07581/FULL)
    Pending
  • 26/07585/ADFULL
    Details of refuse & recycling storage pursuant to condition 3 of planning permission dated 17 February 2023 (RN: 22/08088/FULL).
    Pending
View Planning Timeline

Ownership

  • Corporate Ownership22.9%
  • Overseas OwnershipNo
  • Lease Term Remaining124 yrs
  • CovenantsRestrictive
  • Lease TypeLeasehold
  • 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£45,172
Population Density-
Owner Occupied26%
Age Distribution
0-15 11%16-64 80%65+ 9%
View Area Profile

Schools Nearby

  • Wetherby Preparatory School
    0.2 mi
    Inspected by ISI
  • Halcyon London International School
    0.2 mi
    Inspected by ISI
  • Sylvia Young Theatre School
    0.2 mi
    Inspected by ISI
  • St Vincent's Catholic Primary School
    0.2 mi

    Inspected as St Vincent's Catholic Primary School (URN 101143) on 23 Nov 2023

4 of 6 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All
  • 15 Portman Square
    -
    £2.70M
    -
  • 15 Portman Square
    -
    £2.10M
    -
  • 15 Portman Square
    -
    £25k
    -
  • 15 Portman Square
    -
    £975k
    -