First Floor Flat Front, 175 Portnall Road, London, W9 3BN

UPRN:10033573603Flat/MaisonetteBeds -Built 1900-1929

Tenure: -Council Tax: -EPC: D (64)

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

First Floor Flat Front, 175 Portnall Road, London, W9 3BN

HP Score

/ 100

Strong

Verdict

yesterday

Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.
Strong fundamentals; flood risk not assessed

Evidence

18 of 21 sources

Sale Estimate

£514,000

£463k - £566kMedium

Estimate

£514k

Range

£463k – £566k

Rent Estimate (pcm)

£2,200

£2k - £2k

Monthly

£2,200

Yield

4.40%

Verdict

Derived from HomePortfolio scores

First Floor Flat Front earns an INVESTIGATE rating with HP Score 80/100. Investment score 64/100 reflects moderate fundamentals. Crime intensity is low. Walkability is excellent (95/100). 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 NationsMarket 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

80/ 100

Strong

Investment Score

64/ 100

Moderate

Crime Score

18/ 100

Moderate

Walkability

95/ 100

Excellent

Transit & Bike

Transit 65Bike 80

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesLead to verifyListing checked 5 Nov 2026

This rests largely on a single source. Treat the score as a prompt to investigate, not a conclusion.

Check before relying on this score: leasehold with no service charge disclosed - the stress test assumes GBP 0. It ranks after every home whose inputs are verified.

Valuation edge-0.6/15
claims [AVM -16.7% (MEDIUM)] → measured edge -0.12pp of the ask; on later-registered sales an AVM discount carried no edge and a sold-evidence gap at most +0.5pp; asking more than 10% above the estimate (measured -0.33pp)
Market estimate used (MEDIUM confidence) · snapshot 9 Oct 2026
- valuation_snapshotsestimate for 10033573603· as of 9 Oct 2026
Rental economics0/40
gross yield 4.4%; range width penalty ×0.84
- valuation_snapshotsrent estimate 2200/mo (range 2000-2400)· as of 9 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -1,044/mo, -47% 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 5 Nov 2026· verify before relying on this
Seller motivationNot scored
context, not scored: 0 price cut(s), 61 days on market; homes with a cut sold 0.2-0.3pp further below the cut ask, which is not an edge
- portal_listingsprice_changes + first_published_date· as of 5 Nov 2026
Risk & liquidity12.8/15
258 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

£450,000£690,000

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£599,999

At the asking price

Monthly rent£2,200/mo

Evidenced range £2,000-£2,400

Interest rate5.4%

Loan to value75%

Cash required: £201,300
Net cash flow: -£502/mo
Cash on cash: -3.0%
Score at this price: 12

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.09 - 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 10033573603Valuation edge · as of 9 Oct 2026
valuation_snapshotsrent estimate 2200/mo (range 2000-2400)Rental economics · as of 9 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 5 Nov 2026 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 5 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
Rental economics needs verification before you rely on it
rent estimate 2200/mo (range 2000-2400)
Stress margin needs verification before you rely on it
costs not disclosed by the advert

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£514,000

Rent Estimate (pcm)£2,200

Gross Yield4.40%

1y Growth-11.1%

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
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

5W9 3BN

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
26/07389/NMA
Amendments to planning permission dated 04 June 2025 (RN: 25/02022/FULL), NAMELY, amendment of Condition 4 to correct the property address from 9 Aldridge Road Villas to Flat 1 5 Grittleton Road.
Approved
26/07381/CLEUD
Use of the ground floor rear flat as short-term visitor accommodation.
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

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£45,172

Population Density-

Owner Occupied23%

Age Distribution

0-15 15%16-64 74%65+ 11%

View Area Profile

Schools Nearby

St Luke's CofE Primary School
0.1 mi
OutstandingImproving
Wilberforce Primary
0.1 mi
GoodImproving
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 7 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

175 Portnall Road
-
£535k
-
151C Portnall Road
-
£627k
-
143B Portnall Road
-
£493k
-
153A Portnall Road
-
£685k
-

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