1 Blackthorn Drive, Harlow, CM17 0FS

UPRN:10033889889Detached House4 bedsBuilt -

FreeholdCouncil Tax: Band FEPC: B (85)

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

HP Score

/ 100

Mixed

Verdict

today

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

Evidence

20 of 21 sources

Sale Estimate

£702,000

£667k - £737kHigh

Estimate

£702k

Range

£667k – £737k

Rent Estimate (pcm)

£2,800

£3k - £3k

Monthly

£2,800

Yield

4.28%

Verdict

Derived from HomePortfolio scores

1 Blackthorn Drive earns an INVESTIGATE rating with HP Score 67/100. Investment score 62/100 reflects moderate fundamentals. Crime intensity is low. Walkability is limited (15/100). Flood risk is not assessed: check the Environment Agency long-term flood map before offering. Tenure is freehold. 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

62/ 100

Moderate

Crime Score

15/ 100

Moderate

Walkability

15/ 100

Low

Transit & Bike

Transit 18Bike 49

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 2 Nov 2026

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

Valuation edge-1.6/15
claims [AVM -11.8% (HIGH), sold-comps -55.8%, £/sqft -55.8%] → measured edge -0.33pp 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 (HIGH confidence) · snapshot 9 Oct 2026
- valuation_snapshotsestimate for 10033889889· as of 9 Oct 2026
- property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 11.5%· as of 29 Oct 2026
Rental economics0/40
gross yield 4.3%; range width penalty ×0.84
- valuation_snapshotsrent estimate 2800/mo (range 2550-3050)· as of 9 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -1,384/mo, -49% 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 2 Nov 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 52 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 2 Nov 2026
Risk & liquidity14.6/15
283 sales/12mo in area; valuation range width 10%
- 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

£589,000£902,500

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£785,000

At the asking price

Monthly rent£2,800/mo

Evidenced range £2,550-£3,050

Interest rate5.4%

Loan to value75%

Cash required: £266,050
Net cash flow: -£711/mo
Cash on cash: -3.2%
Score at this price: 13

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.06 - 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 10033889889Valuation edge · as of 9 Oct 2026
property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 11.5%Valuation edge · as of 29 Oct 2026
valuation_snapshotsrent estimate 2800/mo (range 2550-3050)Rental economics · as of 9 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 2 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 2 Nov 2026

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 2800/mo (range 2550-3050)
Seller motivation could not be scored
context, not scored: 0 price cut(s), 52 days on market; homes with a cut sold 0.2-0.3pp further below the cut ask, which is not an edge

Property risk deep-dive →

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£702,000

Rent Estimate (pcm)£2,800

Gross Yield4.28%

1y Growth-

3y Growth+0.2%

5y Growth+0.6%

10y Growth+2.2%

Last Sold Price£519,995 (2019-09-27)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningModerate
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0CM17 0FS

Approval Rate

-12mo

Development

low

HW/HSE/26/00426
Retrospective application for retention of the front porch canopy, black cladding and beige tiles to the front elevation
Pending
HW/CND/26/00388
Application for approval of details reserved by condition 2 (Arboricultural Method Statement) of planning permission HW/HSE/26/00257 for erection of a single-storey detached garden outbuilding to the rear of the property
Conditions
HW/PALHE/26/00384
Erection of a single storey rear extension
Approved

View Planning Timeline

Ownership

Corporate Ownership68.1%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsRestrictive
Lease TypeFreehold
Last Ownership Change2019-09-27
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

3 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£30,654

Population Density-

Owner Occupied67%

Age Distribution

0-15 24%16-64 68%65+ 8%

View Area Profile

Schools Nearby

Harlowbury Primary School
0.1 mi
Report card2026
Ofsted no longer awards a single overall grade.
Churchgate Church of England Voluntary Aided Primary School, Harlow
0.5 mi
Good
Saint Nicholas School
0.6 mi
Inspected by ISI
Fawbert and Barnard's Primary School
0.7 mi
Good

2 of 14 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

27 Blackthorn Drive
-
£171k
-
4 Blackthorn Drive
-
£443k
-
18 Blackthorn Drive
-
£560k
-
18 Blackthorn Drive
-
£565k
-

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