Flat 1, Halkin House, 1 Downage, London, NW4 1AR

UPRN:200142118Flat/MaisonetteBeds -Built -

LeaseholdCouncil Tax: -EPC: B (81)

Data freshness:Listing· freshPrice Paid· freshPlanning· 4mo agoEPC· 6mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 1mo agoArea· Census 2021

Flat 1, Halkin House, 1 Downage, London, NW4 1AR

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

£1,586,000

£1.27M - £1.90MLow

Estimate

£1.59M

Range

£1.27M – £1.90M

Rent Estimate (pcm)

£5,900

£5k - £7k

Monthly

£5,900

Yield

7.08%

Verdict

Derived from HomePortfolio scores

Flat 1 earns an INVESTIGATE rating with HP Score 79/100. Investment score 72/100 reflects strong fundamentals. Crime intensity is low. Walkability is good (83/100). 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 NationsMarket 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

79/ 100

Strong

Investment Score

72/ 100

High

Crime Score

32/ 100

Moderate

Walkability

83/ 100

High

Transit & Bike

Transit 29Bike 64

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 economics12.9/40
gross yield 7.1%; range width penalty ×0.78; the estimate this rent rides on sits 37% above the ask - check the rent describes the advertised home
- valuation_snapshotsrent estimate 5900/mo (range 5250-6500)· as of 10 Oct 2026· verify before relying on this
- valuation_snapshotssale estimate 37% above the ask on the same snapshot - verify the rent describes this home· as of 10 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -12/mo, -0% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); fails the stress - earns nothing; leasehold with no service charge disclosed - the stress assumes GBP 0
- underwriting_assumptionscosts not disclosed by the advert· as of 4 Nov 2026· verify before relying on this
Risk & liquidity9.2/15
202 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£1,000,000

At the asking price

Monthly rent£5,900/mo

Evidenced range £5,250-£6,500

Interest rate5.4%

Loan to value75%

Cash required: £345,050
Net cash flow: £710/mo
Cash on cash: 2.5%
Score at this price: -

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.75 - clears 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 5900/mo (range 5250-6500)Rental economics · as of 10 Oct 2026 · verify before relying on this
valuation_snapshotssale estimate 37% above the ask on the same snapshot - verify the rent describes this homeRental economics · as of 10 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 4 Nov 2026 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 4 Nov 2026
property_intelligencetransactions_12mo

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 5900/mo (range 5250-6500)

Plan

Before you offer

1. Get two written rental appraisals from local lettings agents.
The market estimate this rent rides on sits far above the asking price, so the rent may describe a different home.
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£1,586,000

Rent Estimate (pcm)£5,900

Gross Yield7.08%

1y Growth-

3y Growth-3.3%

5y Growth+0.4%

10y Growth+1.1%

Last Sold Price£1,300,000 (2011-06-27)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0NW4 1AR

Approval Rate

-12mo

Development

low

26/3902/RCU
Change of use of the property from a single family dwelling (Class C3) to 3 bed House in Multiple Occupation (HMO) (Class C4) for up to 3 people (Retrospective Application)
Pending
26/3848/FUL
Mansard roof extension involving 2no. front, 3no. side and 2no. rear dormer windows to provide 1no. self-contained flat including raising of the eaves level and addition of window to second floor. Removal of chimneys. Additional side door to ground floor level to provide access to cycle and refuse/recycling storage
Pending
26/3829/FUL
Change of use of the existing dwelling (Use Class C3) to a 11 bed 11 Person HMO (House in Multiple Occupation) (Use Class Sui Generis) including part single, part two storey side and rear extensions and roof extension involving rear dormer window. Associated refuse/recycling storage, cycle parking, landscaping and external amenity space
Pending

View Planning Timeline

Ownership

Corporate Ownership47.3%
Overseas OwnershipNo
Lease Term Remaining999+ yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2011-06-27
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

13 Mbps

Mobile 4G/5G Coverage

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£39,239

Population Density5,263 /km²

Owner Occupied55%

Age Distribution

0-15 20%16-64 65%65+ 15%

View Area Profile

Schools Nearby

St Mary's and St John's CofE School
0.2 mi
Inspected as St Mary's and St John's CofE School (URN 103119) on 28 Feb 2024
Kisharon College
0.3 mi
-
Kisharon School
0.3 mi
Good
Middlesex University
0.3 mi
-

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

View All Schools

Comparables

View All

Halkin House, 1 Downage
-
£1.42M
-
Halkin House, 1 Downage
-
£1.50M
-
Halkin House, 1 Downage
-
£1.14M
-
Halkin House, 1 Downage
-
£875k
-

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