Flat 43, Berkeley House, 15 Hay Hill, London, W1J 8NS

UPRN:100022764993Flat/Maisonette1 bedsBuilt before 1900

LeaseholdCouncil Tax: Band FEPC: E (47)

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

Flat 43, Berkeley House, 15 Hay Hill, London, W1J 8NS

HP Score

/ 100

Mixed

Verdict

yesterday

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

Evidence

20 of 21 sources

Sale Estimate

£1,071,000

£857k - £1.29MLow

Estimate

£1.07M

Range

£857k – £1.29M

Rent Estimate (pcm)

£3,900

£3k - £4k

Monthly

£3,900

Yield

4.70%

Verdict

Derived from HomePortfolio scores

Flat 43 earns an INVESTIGATE rating with HP Score 67/100. Investment score 77/100 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 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 covenantsHM Land Registry leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

67/ 100

Mixed

Investment Score

77/ 100

High

100

Crime Score

100/ 100

Elevated

100

Walkability

100/ 100

Excellent

Transit & Bike

Transit 100Bike 74

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 economics0/40
gross yield 4.7%; range width penalty ×0.74
- valuation_snapshotsrent estimate 3900/mo (range 3450-4350)· as of 10 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -1,461/mo, -37% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); fails the stress - earns nothing
- underwriting_assumptionscosts not disclosed by the advert· as of 4 Nov 2026
Risk & liquidity4.5/15
12 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£995,000

At the asking price

Monthly rent£3,900/mo

Evidenced range £3,450-£4,350

Interest rate5.4%

Loan to value75%

Cash required: £343,050
Net cash flow: -£658/mo
Cash on cash: -2.3%
Score at this price: -

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.16 - 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_snapshotsrent estimate 3900/mo (range 3450-4350)Rental economics · as of 10 Nov 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 4 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 4 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
Valuation edge could not be scored
estimate confidence LOW below scoring floor
Rental economics needs verification before you rely on it
rent estimate 3900/mo (range 3450-4350)

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. Fill the valuation edge gap before relying on the score.
estimate confidence LOW below scoring floor
3. 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£1,071,000

Rent Estimate (pcm)£3,900

Gross Yield4.70%

1y Growth-

3y Growth-23.0%

5y Growth-10.9%

10y Growth-3.2%

Last Sold Price£150,000 (1997-06-23)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0W1J 8NS

Approval Rate

-12mo

Development

low

26/07468/CLOPUD
Confirmation the demolition of the existing outrigger structure at fifth floor level (the Proposed Works) constitutes the lawful commencement of development pursuant to the Permission.
Pending
26/07475/ADLBC
Details of the methodology for repairs to the external render, stonework, ironwork and windows pursuant to Conditions 4 and 5 of listed building consent dated 17 September 2026 (RN: 26/04900/LBC).
Pending
26/07461/LBC
Minor internal works comprising redecoration and upgrades to lighting, flooring and bathroom and kitchen facilities, together with external works including new lighting and signage.
Pending

View Planning Timeline