Apartment 1, 3 Blackthorn Avenue, London, N7 8AW

UPRN:10023216273Flat/Maisonette1 bedsBuilt 2007 onwards

LeaseholdCouncil Tax: Band DEPC: C (76)

Data freshness:Listing· freshPlanning· 4mo agoOwnership· freshEPC· 6mo agoRisk· 5mo agoCrime· freshConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021Council Tax· 6mo ago

Apartment 1, 3 Blackthorn Avenue, London, N7 8AW

HP Score

/ 100

Strong

Verdict

3 days ago

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

Evidence

19 of 21 sources

Sale Estimate

£548,000

£494k - £603kMedium

Estimate

£548k

Range

£494k – £603k

Rent Estimate (pcm)

£2,450

£2k - £3k

Monthly

£2,450

Yield

3.67%

Verdict

Derived from HomePortfolio scores

Apartment 1 earns an INVESTIGATE rating with HP Score 77/100. Investment score 70/100 reflects strong fundamentals. Crime intensity is moderate. Walkability is excellent (90/100). 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 covenantsHM Land Registry leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

77/ 100

Strong

Investment Score

70/ 100

High

Crime Score

39/ 100

Elevated

Walkability

90/ 100

Excellent

Transit & Bike

Transit 79Bike 76

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesLead to verifyListing checked 11 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 -46.0% (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 Nov 2026
- valuation_snapshotsestimate for 10023216273· as of 9 Nov 2026
Rental economics0/40
gross yield 3.7%; range width penalty ×0.87
- valuation_snapshotsrent estimate 2450/mo (range 2250-2650)· as of 9 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -1,704/mo, -70% 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 11 Nov 2026· verify before relying on this
Seller motivationNot scored
context, not scored: 0 price cut(s), 220 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 11 Nov 2026
Risk & liquidity12.9/15
281 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

£600,000£920,000

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£800,000

At the asking price

Monthly rent£2,450/mo

Evidenced range £2,250-£2,650

Interest rate5.4%

Loan to value75%

Cash required: £271,300
Net cash flow: -£1,004/mo
Cash on cash: -4.4%
Score at this price: 12

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 0.91 - 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 10023216273Valuation edge · as of 9 Nov 2026
valuation_snapshotsrent estimate 2450/mo (range 2250-2650)Rental economics · as of 9 Nov 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 11 Nov 2026 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 11 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 2450/mo (range 2250-2650)
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£548,000

Rent Estimate (pcm)£2,450

Gross Yield3.67%

1y Growth+62.2%

3y Growth+0.9%

5y Growth+0.2%

10y Growth+1.3%

Last Sold Price£285,000 (2010-10-29)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0N7 8AW

Approval Rate

-12mo

Development

low

P2026/2921/FUL
Erection of replacement external staircase to serve the lower ground floor from pavement level.
Pending
P2026/2926/TRE
Removal of tree in the Rear Garden and replace with semi-mature japanese acer.
Pending
P2026/2902/FUL
The installation of rooftop plant machinery, acoustic screen, and associated works
Pending

View Planning Timeline