25 Marbaix Gardens, Isleworth, TW7 4FD

UPRN:10091070444Detached House5 bedsBuilt 2007-2011

FreeholdCouncil Tax: Band GEPC: C (78)

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

HP Score

/ 100

Strong

Verdict

yesterday

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

Evidence

20 of 21 sources

Sale Estimate

£1,043,000

£991k - £1.09MHigh

Estimate

£1.04M

Range

£991k – £1.09M

Rent Estimate (pcm)

£3,950

£4k - £4k

Monthly

£3,950

Yield

4.99%

Verdict

Derived from HomePortfolio scores

25 Marbaix Gardens earns an INVESTIGATE rating with HP Score 82/100. Investment score 69/100 reflects moderate fundamentals. Crime intensity is very low. Walkability is good (80/100). 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

82/ 100

Strong

Investment Score

69/ 100

Moderate

Crime Score

12/ 100

Low

Walkability

80/ 100

High

Transit & Bike

Transit 62Bike 66

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 +8.9% (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 10091070444· as of 9 Oct 2026
Rental economics0/40
gross yield 5.0%; range width penalty ×0.77
- valuation_snapshotsrent estimate 3950/mo (range 3500-4350)· as of 9 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -1,235/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 6 Nov 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 255 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

£712,500£1,092,500

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£950,000

At the asking price

Monthly rent£3,950/mo

Evidenced range £3,500-£4,350

Interest rate5.4%

Loan to value75%

Cash required: £325,050
Net cash flow: -£472/mo
Cash on cash: -1.7%
Score at this price: 15

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.23 - 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 10091070444Valuation edge · as of 9 Oct 2026
valuation_snapshotsrent estimate 3950/mo (range 3500-4350)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 3950/mo (range 3500-4350)
Seller motivation could not be scored
context, not scored: 0 price cut(s), 255 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. Treat the gap to the estimate as unproven - compare recent sold prices on the street yourself before pricing an offer around it.
On later completions, homes listed below their estimate sold at the same share of the asking price as the rest.
3. 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£1,043,000

Rent Estimate (pcm)£3,950

Gross Yield4.99%

1y Growth-

3y Growth-0.6%

5y Growth+0.2%

10y Growth+1.2%

Last Sold Price£630,000 (2012-05-02)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0TW7 4FD

Approval Rate

-12mo

Development

low

P/2026/3106
Erection of a rear roof extension with hip to gable conversion with two front roof windows and a single storey rear extension.
Pending
P/2026/3109
Works to two trees within a conservation area. T1 Oak (Quercus spp.). Crown reduce by approximately 2m, back to most recent previous reduction points, to tidy and contain. Final heights 10m and final spreads 8m. T2 False Acacia (Robinia pseudoacacia). Crown reduce on house side only, by approximately 2-3m, back to most recent previous reduction points. Final heights unchanged and final spreads 6m.
Pending
P/2026/3077
Certificate of lawfulness for the proposed erection of a detached outbuilding in the rear garden.
Pending

View Planning Timeline