439 Twickenham Road, Isleworth, TW7 7ES

UPRN:100021576264Semi-Detached House3 bedsBuilt 1950-1966

FreeholdCouncil Tax: Band EEPC: D (67)

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

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

£572,000

£544k - £601kHigh

Estimate

£572k

Range

£544k – £601k

Rent Estimate (pcm)

£2,450

£2k - £3k

Monthly

£2,450

Yield

5.11%

Verdict

Derived from HomePortfolio scores

439 Twickenham Road earns an INVESTIGATE rating with HP Score 76/100. Investment score 60/100 reflects moderate fundamentals. Crime intensity is low. Walkability is excellent (91/100). 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)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 Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

76/ 100

Strong

Investment Score

60/ 100

Moderate

Crime Score

32/ 100

Moderate

Walkability

91/ 100

Excellent

Transit & Bike

Transit 40Bike 73

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 12 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 -0.5% (HIGH)] → 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 10 Nov 2026
- valuation_snapshotsestimate for 100021576264· as of 10 Nov 2026
Rental economics0.8/40
gross yield 5.1%; range width penalty ×0.83
- valuation_snapshotsrent estimate 2450/mo (range 2250-2700)· as of 10 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -755/mo, -31% 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 12 Nov 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 73 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 12 Nov 2026
Risk & liquidity14.6/15
267 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

£431,000£661,000

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£575,000

At the asking price

Monthly rent£2,450/mo

Evidenced range £2,250-£2,700

Interest rate5.4%

Loan to value75%

Cash required: £192,550
Net cash flow: -£244/mo
Cash on cash: -1.5%
Score at this price: 15

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.26 - 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 100021576264Valuation edge · as of 10 Nov 2026
valuation_snapshotsrent estimate 2450/mo (range 2250-2700)Rental economics · as of 10 Nov 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 12 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 12 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 2250-2700)
Seller motivation could not be scored
context, not scored: 0 price cut(s), 73 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£572,000

Rent Estimate (pcm)£2,450

Gross Yield5.11%

1y Growth-

3y Growth-0.6%

5y Growth+0.2%

10y Growth+1.2%

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

2TW7 7ES

Approval Rate

100%12mo

Development

low

P/2026/3159
Erection of a single storey rear extension and a rear roof extension with three roof windows to the front of the house.
Pending
PA26/3769
T1 & T2: Olives - Crown reduce the height by 30% (approx. 2.5m) Crown reduce the spread to balance and shape ensuring to retain green foliage (approx. 2.0m) T3: Magnolia grandiflora - Crown reduce the height and spread by approx. 20% (approx. 2.0m height and 1.5m spread) Crown thin by by 10% and remove dead wood Maintenance works in line with good arboricultural practice
Pending
PA26/3760
Installation of 2 x external AC condensing units to side elevation of property. Installation of glazed roof pergola to rear elevation of property.
Pending

View Planning Timeline