Flat B First Floor, 144 Portnall Road, London, W9 3BQ

UPRN:10033598652Flat/Maisonette2 bedsBuilt 1900-1929

Tenure: -Council Tax: -EPC: D (65)

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

Flat B First Floor, 144 Portnall Road, London, W9 3BQ

HP Score

/ 100

Mixed

Verdict

today

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

Evidence

19 of 21 sources

Sale Estimate

£543,000

£434k - £651kLow

Estimate

£543k

Range

£434k – £651k

Rent Estimate (pcm)

£2,300

£2k - £3k

Monthly

£2,300

Yield

5.58%

Verdict

Derived from HomePortfolio scores

Flat B First Floor earns an INVESTIGATE rating with HP Score 48/100. Investment score 54/100 reflects moderate fundamentals. Crime intensity is moderate. Walkability is limited (0/100). 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 covenantsHM Land Registry leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

48/ 100

Mixed

Investment Score

54/ 100

Moderate

Crime Score

44/ 100

Elevated

Walkability

0/ 100

Low

Transit & Bike

Transit 64Bike 55

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 economics3.9/40
gross yield 5.6%; range width penalty ×0.85
- valuation_snapshotsrent estimate 2300/mo (range 2100-2500)· as of 13 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -528/mo, -23% 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
258 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£495,000

At the asking price

Monthly rent£2,300/mo

Evidenced range £2,100-£2,500

Interest rate5.4%

Loan to value75%

Cash required: £164,550
Net cash flow: -£78/mo
Cash on cash: -0.6%
Score at this price: -

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.38 - 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 2300/mo (range 2100-2500)Rental economics · as of 13 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_12moRisk & liquidity

Sold comparables in depth

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 2300/mo (range 2100-2500)

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£543,000

Rent Estimate (pcm)£2,300

Gross Yield5.58%

1y Growth+121.3%

3y Growth-4.5%

5y Growth-0.6%

10y Growth-0.3%

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

0W9 3BQ

Approval Rate

-12mo

Development

low

26/2769
T1. Sycamore (Acer psuedoplatanus) Rear garden Large mature tree dominating rear garden and overhanging adjacent gardens. Snapped branches throughout canopy, and squirrel damage on new growth. Previously reduced 4 years ago. Reduce canopy to previous points of reduction (3m in height and 2m in lateral spread) to maintain cyclical pruning and improve light into surrounding areas.
Pending
26/07363/FULL
Demolition of existing rear/side extension and construction of a new extension together with new glazing and doors, and changing the existing rooflights to the rear roof slope with new rooflights.
Pending
26/2743
Creation of basement level and rear extensions at ground floor to increase rooms from 21 existing to 26 proposed rooms, formation of internal courtyard, reconfiguration of existing layouts, provision for cycle and refuse storage, landscaping and boundary treatment to hotel.
Pending

View Planning Timeline

Ownership

Corporate Ownership53.7%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsRestrictive
Lease Type-
Last Ownership Change-
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

7 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£45,172

Population Density33,354 /km²

Owner Occupied13%

Age Distribution

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

View Area Profile

Schools Nearby

Wilberforce Primary
0.1 mi
GoodImproving
St Luke's CofE Primary School
0.1 mi
OutstandingImproving
Dorothy Gardner Nursery School
0.2 mi
Report card2026
Ofsted no longer awards a single overall grade.
The St Marylebone Church of England Bridge School
0.2 mi
-

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

View All Schools

Comparables

View All

166A Portnall Road
-
£830k
-
146 Portnall Road
-
£375k
-
168B Portnall Road
-
£500k
-
166 Portnall Road
-
£535k
-

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