Flat 2, Riverside Mill House, 20 Church Street, Isleworth, TW7 6XB

UPRN:10001271248Flat/Maisonette2 bedsBuilt 2007 onwards

LeaseholdCouncil Tax: Band EEPC: C (78)

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

Flat 2, Riverside Mill House, 20 Church Street, Isleworth, TW7 6XB

HP Score

/ 100

Strong

Verdict

5 days ago

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

Evidence

20 of 21 sources

Sale Estimate

£574,000

£516k - £631kMedium

Estimate

£574k

Range

£516k – £631k

Rent Estimate (pcm)

£2,550

£2k - £3k

Monthly

£2,550

Yield

4.71%

Verdict

Derived from HomePortfolio scores

Flat 2 earns an INVESTIGATE rating with HP Score 82/100. Investment score 72/100 reflects strong fundamentals. Crime intensity is low. Walkability is excellent (99/100). Flood risk is not assessed: check the Environment Agency long-term flood map before offering. Tenure is leasehold. 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

72/ 100

High

Crime Score

27/ 100

Moderate

Walkability

99/ 100

Excellent

Transit & Bike

Transit 26Bike 66

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 4 Nov 2026

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

Valuation edge-0.6/15
claims [AVM -13.2% (MEDIUM)] → measured edge -0.12pp 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 (MEDIUM confidence) · snapshot 13 Oct 2026
- valuation_snapshotsestimate for 10001271248· as of 13 Oct 2026
Rental economics0/40
gross yield 4.7%; range width penalty ×0.85
- valuation_snapshotsrent estimate 2550/mo (range 2350-2800)· as of 13 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -1,118/mo, -44% of rent (6.75% on a 75% loan; disclosed service charge and ground rent); fails the stress - earns nothing
- listing_factsservice charge / ground rent from the advert· as of 4 Nov 2026
Seller motivationNot scored
context, not scored: 1 price cut(s), 129 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 4 Nov 2026
Risk & liquidity12.8/15
267 sales/12mo in area; valuation range width 20%
- 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£2,550/mo

Evidenced range £2,350-£2,800

Interest rate5.4%

Loan to value75%

Cash required: £218,800
Net cash flow: -£428/mo
Cash on cash: -2.3%
Score at this price: 12

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.16 - 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 10001271248Valuation edge · as of 13 Oct 2026
valuation_snapshotsrent estimate 2550/mo (range 2350-2800)Rental economics · as of 13 Oct 2026 · verify before relying on this
listing_factsservice charge / ground rent from the advertStress margin · as of 4 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 4 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 2550/mo (range 2350-2800)
Seller motivation could not be scored
context, not scored: 1 price cut(s), 129 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. Ask the agent why the price was reduced and whether a previous sale fell through.
1 price cut(s) recorded on the listing history.
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£574,000

Rent Estimate (pcm)£2,550

Gross Yield4.71%

1y Growth-

3y Growth-0.6%

5y Growth+0.2%

10y Growth+1.2%

Last Sold Price£315,000 (2010-05-28)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

4TW7 6XB

Approval Rate

-12mo

Development

low

PA26/3758
T1 Eucalyptus tree to selectively thin removing heavier limbs to relieve canopy of weight to remove all dead wood and to lift lower canopy to a standing height of 10ft, start size 12mx7m finish 11mx6m T2 Eucalyptus tree to selectively thin by 30%and lift lower canopy to a standing height of 10ft, start size 7mx5m finish 6mx4m
Pending
P/2026/3027
Erection of a single storey side and rear extension and rear roof extension.
Pending
P/2026/2993
Details of Condition 13 (Boundary treatment and landscaping drawing) submitted pursuant to permission P/2024/0043 dated 27/02/2024 for Variation of conditions 2 (approved plans) and 6 (Energy) of planning permission 00188/ADJ20/P1 approved 25/10/2022 for the demolition of the existing six garages and the erection of a part single, part two storey detached house
Pending

View Planning Timeline