41C Hertford Street, London, W1J 7SJ

UPRN:10033564381Flat/Maisonette1 bedsBuilt 1900-1929

Tenure: -Council Tax: -EPC: E (43)

Data freshness:Listing· freshPlanning· 4mo agoOwnership· freshEPC· 6mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021

HP Score

/ 100

Mixed

Verdict

3 days ago

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

Evidence

18 of 21 sources

Sale Estimate

£1,505,000

£1.35M - £1.66MMedium

Estimate

£1.50M

Range

£1.35M – £1.66M

Rent Estimate (pcm)

£5,500

£5k - £6k

Monthly

£5,500

Yield

4.06%

Verdict

Derived from HomePortfolio scores

41C Hertford Street earns an INVESTIGATE rating with HP Score 66/100. Investment score 77/100 reflects strong fundamentals. Crime intensity is elevated. 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)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

66/ 100

Mixed

Investment Score

77/ 100

High

100

Crime Score

100/ 100

Elevated

Walkability

99/ 100

Excellent

Transit & Bike

Transit 82Bike 74

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 6 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 -8.0% (MEDIUM)] → 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 (MEDIUM confidence) · snapshot 9 Nov 2026
- valuation_snapshotsestimate for 10033564381· as of 9 Nov 2026
Rental economics0/40
gross yield 4.1%; range width penalty ×0.76
- valuation_snapshotsrent estimate 5500/mo (range 4900-6100)· as of 9 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -3,283/mo, -60% 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 6 Nov 2026
Seller motivationNot scored
no listing-history inputs (first published date, price changes)
Risk & liquidity8.2/15
12 sales/12mo in area; valuation range width 20%
- 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

£1,219,000£1,868,500

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£1,625,000

At the asking price

Monthly rent£5,500/mo

Evidenced range £4,900-£6,100

Interest rate5.4%

Loan to value75%

Cash required: £597,550
Net cash flow: -£1,677/mo
Cash on cash: -3.4%
Score at this price: 8

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.00 - below 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 10033564381Valuation edge · as of 9 Nov 2026
valuation_snapshotsrent estimate 5500/mo (range 4900-6100)Rental economics · as of 9 Nov 2026 · verify before relying on this
listing_factsservice charge / ground rent from the advertStress margin · as of 6 Nov 2026
property_intelligencetransactions_12moRisk & liquidity

Sold comparables in depth Valuation methodology

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 5500/mo (range 4900-6100)
Seller motivation could not be scored
no listing-history inputs (first published date, price changes)

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

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. 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£1,505,000

Rent Estimate (pcm)£5,500

Gross Yield4.06%

1y Growth-

3y Growth-23.0%

5y Growth-10.9%

10y Growth-3.2%

Last Sold Price-

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0W1J 7SJ

Approval Rate

-12mo

Development

low

26/07410/FULL
Alterations to the existing basement to Level 06, and an extension of the existing building to provide an additional floor of new office (Class E(g)(i)) floorspace, including a new roof level terrace and plant room; public realm and associated works.
Pending
26/07420/COGADF
Details of each proposed sculpture by way of drawings, photographs and artists CV pursuant to condition 3 of planning permission dated 30.09.2025 (RN:25/05296/COFUL)
Pending
26/07409/LBC
Provision of internally illuminated temporary Christmas decoration to front facade at ground floor level between 18th December 2026 and 9th January 2027 (Linked to 26/07429/ADV)
Pending

View Planning Timeline

Ownership

Corporate Ownership14.6%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsNone
Lease Type-
Last Ownership Change-
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

20 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£45,172

Population Density2,316 /km²

Owner Occupied36%

Age Distribution

0-15 8%16-64 73%65+ 19%

View Area Profile

Schools Nearby

London Park School Mayfair and London Park School Sixth
0.2 mi
Inspected by ISI
St George's Hanover Square CofE Primary School
0.2 mi
Good
St Peter's Eaton Square CofE Primary School
0.7 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.
The Fountain Christian School
0.7 mi
-

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

View All Schools

Comparables

View All

41 Hertford Street
-
£1.45M
-
41 Hertford Street
-
£2.45M
-
41 Hertford Street
-
£1.05M
-
41 Hertford Street
-
£1.40M
-

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