35 Summerhouse Lane, Harmondsworth, West Drayton, UB7 0AW

UPRN:100021508320Detached House4 bedsBuilt 1967-1975

FreeholdCouncil Tax: Band FEPC: C (69)

Data freshness:Listing· freshPlanning· 4mo agoOwnership· freshEPC· 3mo agoRisk· 5mo agoCrime· freshConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021Council Tax· 1mo ago

35 Summerhouse Lane, Harmondsworth, West Drayton, UB7 0AW

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

£643,000

£611k - £675kHigh

Estimate

£643k

Range

£611k – £675k

Rent Estimate (pcm)

£2,900

£3k - £3k

Monthly

£2,900

Yield

5.35%

Verdict

Derived from HomePortfolio scores

35 Summerhouse Lane earns an INVESTIGATE rating with HP Score 44/100. Investment score 50/100 reflects moderate fundamentals. Crime intensity is elevated. Walkability is limited (39/100). 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 Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

44/ 100

Mixed

Investment Score

50/ 100

Moderate

100

Crime Score

100/ 100

Elevated

Walkability

39/ 100

Mixed

Transit & Bike

Transit 14Bike 54

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 13 Nov 2026

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

Valuation edge0/15
claims [AVM -1.1% (HIGH), sold-comps -18.8%, £/sqft -18.8%] → measured edge +0.00pp of the ask; on later-registered sales an AVM discount carried no edge and a sold-evidence gap at most +0.5pp
Market estimate used (HIGH confidence) · snapshot 9 Nov 2026
- valuation_snapshotsestimate for 100021508320· as of 9 Nov 2026
- property_comparablessold-evidence family (implied value + £/sqft): 6 comps, dispersion 3.9%· as of 6 Nov 2026
Rental economics2.4/40
gross yield 5.4%; range width penalty ×0.86
- valuation_snapshotsrent estimate 2900/mo (range 2650-3150)· as of 9 Nov 2026· verify before relying on this
- listing_factslisting text signals condition works - budget before trusting any yield· as of 13 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -741/mo, -26% 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 13 Nov 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 151 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 13 Nov 2026
Risk & liquidity14.6/15
195 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

£487,500£747,500

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£650,000

At the asking price

Monthly rent£2,900/mo

Evidenced range £2,650-£3,150

Interest rate5.4%

Loan to value75%

Cash required: £218,800
Net cash flow: -£186/mo
Cash on cash: -1.0%
Score at this price: 17

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.32 - 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_snapshotsestimate for 100021508320Valuation edge · as of 9 Nov 2026
property_comparablessold-evidence family (implied value + £/sqft): 6 comps, dispersion 3.9%Valuation edge · as of 6 Nov 2026
valuation_snapshotsrent estimate 2900/mo (range 2650-3150)Rental economics · as of 9 Nov 2026 · verify before relying on this
listing_factslisting text signals condition works - budget before trusting any yieldRental economics · as of 13 Nov 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 13 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 2900/mo (range 2650-3150)
Rental economics needs verification before you rely on it
listing text signals condition works - budget before trusting any yield

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£643,000

Rent Estimate (pcm)£2,900

Gross Yield5.35%

1y Growth+10.2%

3y Growth+3.8%

5y Growth+2.0%

10y Growth+2.3%

Last Sold Price£250,000 (2009-09-21)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceModerate
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0UB7 0AW

Approval Rate

-12mo

Development

low

PA/2026/1006
New development to the North, East, South and West of the existing Heathrow Airport. (Observations)
Pending
26/1642/NAC
Neighbouring Authority Consultation: EIA Scoping consultation from The Planning Inspectorate relating to application for Development Consent for the Heathrow West development. (PINS Reference TR020004)
Approved
PLN/2026/2119
Consultation on EIA Scoping Opinion for the expansion of Heathrow Airport comprising a 2,400m-long third runway, a new Terminal 6, and associated works and infrastructure
Approved

View Planning Timeline