Apartment 1, 66 Chiltern Street, London, W1U 4EJ

UPRN:10033640330Purpose Built Flat2 bedsBuilt -

LeaseholdCouncil Tax: Band HEPC: -

Data freshness:Listing· freshPlanning· 4mo agoOwnership· freshRisk· 5mo agoCrime· freshConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021Council Tax· 1mo ago

Apartment 1, 66 Chiltern Street, London, W1U 4EJ

HP Score

/ 100

Mixed

Verdict

2 days ago

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

Evidence

19 of 21 sources

Sale Estimate

£4,253,000

£3.40M - £5.10MLow

Estimate

£4.25M

Range

£3.40M – £5.10M

Rent Estimate (pcm)

£13,450

£12k - £15k

Monthly

£13,450

Yield

2.93%

Verdict

Derived from HomePortfolio scores

Apartment 1 earns an INVESTIGATE rating with HP Score 66/100. Investment score 72/100 reflects strong 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 SourcesPortal 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

66/ 100

Mixed

Investment Score

72/ 100

High

100

Crime Score

100/ 100

Elevated

100

Walkability

100/ 100

Excellent

Transit & Bike

Transit 100Bike 71

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£13,450/mo

Evidenced range £11,950-£14,950

Interest rate5.4%

Loan to value75%

Cash required: £2,225,050
Net cash flow: -£9,251/mo
Cash on cash: -5.0%
Score at this price: -

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 0.72 - 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£4,253,000

Rent Estimate (pcm)£13,450

Gross Yield2.93%

1y Growth-24.0%

3y Growth-6.2%

5y Growth-2.6%

10y Growth-1.3%

Last Sold Price£4,720,000 (2019-01-25)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0W1U 4EJ

Approval Rate

-12mo

Development

low

26/07543/FULL
Erection of a mansard roof extension to provide an additional bedroom to the single-family dwelling, together with replacement of the existing front door with a painted solid timber panelled door (renewal of planning permission 16/04632/FULL, allowed on appeal on 8 June 2017 APP/X5990/W/3172534).
Pending
26/07541/AD7
Display for a temporary period of six months of a non-illuminated estate agent board located on the face of the building at ground floor level and measuring 0.45m x 0.6m
Pending
26/07544/ADFULL
Details of replacement surfacing, soft landscaping and associated foundations pursuant to Condition 4 of planning permission dated 11 June 2026 (RN: 26/02173/FULL).
Pending

View Planning Timeline

Ownership

Corporate Ownership15.3%
Overseas OwnershipNo
Lease Term Remaining999+ yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2019-01-25
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

22 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£45,172

Population Density-

Owner Occupied36%

Age Distribution

0-15 10%16-64 76%65+ 14%

View Area Profile

Schools Nearby

ICS London
0.2 mi
Inspected by ISI
The St Marylebone CofE School
0.2 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.
St Vincent's Catholic Primary School
0.2 mi
Inspected as St Vincent's Catholic Primary School (URN 101143) on 23 Nov 2023
St Mary's Bryanston Square CofE School
0.3 mi
GoodConcerns

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

View All Schools

Comparables

View All

Chiltern Place, 66 Chiltern Street
-
£5.75M
-
Chiltern Place, 66 Chiltern Street
-
£9.70M
-
66 Chiltern Street
-
£300k
-
Chiltern Place, 66 Chiltern Street
-
£5.38M
-

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