28 Bourne Close, Isleworth, TW7 6HD

UPRN:10001264091Converted Flat2 bedsBuilt 2007-2011

Tenure: -Council Tax: Band CEPC: C (77)

Data freshness:Listing· freshPrice Paid· freshPlanning· 4mo agoEPC· 6mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021

HP Score

/ 100

Strong

Verdict

today

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

Evidence

18 of 21 sources

Sale Estimate

£308,000

£292k - £323kHigh

Estimate

£308k

Range

£292k – £323k

Rent Estimate (pcm)

£1,350

£1k - £2k

Monthly

£1,350

Yield

5.23%

Verdict

Derived from HomePortfolio scores

28 Bourne Close earns an INVESTIGATE rating with HP Score 76/100. Investment score 69/100 reflects moderate fundamentals. Crime intensity is low. Walkability is good (71/100). 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 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 leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

76/ 100

Strong

Investment Score

69/ 100

Moderate

Crime Score

23/ 100

Moderate

Walkability

71/ 100

High

Transit & Bike

Transit 30Bike 71

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 6 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 -0.6% (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 9 Oct 2026
- valuation_snapshotsestimate for 10001264091· as of 9 Oct 2026
Rental economics1.5/40
gross yield 5.2%; range width penalty ×0.83
- valuation_snapshotsrent estimate 1350/mo (range 1250-1500)· as of 9 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -446/mo, -33% 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 6 Nov 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 247 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 6 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

£232,500£356,500

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£310,000

At the asking price

Monthly rent£1,350/mo

Evidenced range £1,250-£1,500

Interest rate5.4%

Loan to value75%

Cash required: £99,800
Net cash flow: -£112/mo
Cash on cash: -1.3%
Score at this price: 16

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.29 - 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 10001264091Valuation edge · as of 9 Oct 2026
valuation_snapshotsrent estimate 1350/mo (range 1250-1500)Rental economics · as of 9 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 6 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 6 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 1350/mo (range 1250-1500)
Seller motivation could not be scored
context, not scored: 0 price cut(s), 247 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£308,000

Rent Estimate (pcm)£1,350

Gross Yield5.23%

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

0TW7 6HD

Approval Rate

-12mo

Development

low

P/2026/3076
Enlargement of detached outbuilding in the rear garden.
Pending
P/2026/3062
Formation of vehicular access to the front of the house with associated hardstanding.
Pending
P/2026/3086
Certificate of lawfulness for the proposed change of use of a single family house (C3) to Supported living accommodation (C3(b).
Pending

View Planning Timeline