1 Holly House, Brambles Close, Isleworth, TW7 5BY

UPRN:100021566806Flat/Maisonette2 bedsBuilt 1967-1975

LeaseholdCouncil Tax: Band CEPC: C (69)

Data freshness:Listing· freshPlanning· 4mo agoEPC· 2mo agoRisk· 2y agoAmenities· 1mo agoArea· Census 2021

1 Holly House, Brambles Close, Isleworth, TW7 5BY

HP Score

/ 100

Mixed

Verdict

3 days ago

Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.
Mixed signals - investigate

Evidence

19 of 21 sources

Sale Estimate

£491,000

£467k - £516kHigh

Estimate

£491k

Range

£467k – £516k

Rent Estimate (pcm)

£2,200

£2k - £2k

Monthly

£2,200

Yield

5.33%

Verdict

Derived from HomePortfolio scores

1 Holly House earns an INVESTIGATE rating with HP Score 71/100. Investment score 66/100 reflects moderate fundamentals. Crime intensity is moderate. Walkability is good (72/100). 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 covenantsHM Land Registry leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

71/ 100

Mixed

Investment Score

66/ 100

Moderate

Crime Score

46/ 100

Elevated

Walkability

72/ 100

High

Transit & Bike

Transit 47Bike 69

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesLead to verifyListing checked 24 Oct 2026

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

Check before relying on this score: leasehold with no service charge disclosed - the stress test assumes GBP 0. It ranks after every home whose inputs are verified.

Valuation edge0/15
claims [AVM -0.8% (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 Oct 2026
- valuation_snapshotsestimate for 100021566806· as of 10 Oct 2026
Rental economics2.4/40
gross yield 5.3%; range width penalty ×0.88
- valuation_snapshotsrent estimate 2200/mo (range 2000-2350)· as of 10 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -601/mo, -27% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); fails the stress - earns nothing; leasehold with no service charge disclosed - the stress assumes GBP 0
- underwriting_assumptionscosts not disclosed by the advert· as of 24 Oct 2026· verify before relying on this
Seller motivationNot scored
context, not scored: 0 price cut(s), 111 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 24 Oct 2026
Risk & liquidity14.6/15
268 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

£371,000£569,000

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£495,000

At the asking price

Monthly rent£2,200/mo

Evidenced range £2,000-£2,350

Interest rate5.4%

Loan to value75%

Cash required: £164,550
Net cash flow: -£148/mo
Cash on cash: -1.1%
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 100021566806Valuation edge · as of 10 Oct 2026
valuation_snapshotsrent estimate 2200/mo (range 2000-2350)Rental economics · as of 10 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 24 Oct 2026 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 24 Oct 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 2200/mo (range 2000-2350)
Stress margin needs verification before you rely on it
costs not disclosed by the advert

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£491,000

Rent Estimate (pcm)£2,200

Gross Yield5.33%

1y Growth-

3y Growth-0.6%

5y Growth+0.0%

10y Growth+1.2%

Last Sold Price£380,000 (2018-11-02)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0TW7 5BY

Approval Rate

-12mo

Development

low

P/2026/2971
Details of Condition 3 (Vehicle Tracking and Junction Geometry), submitted pursuant to permission P/2026/1294 dated 08/09/2026 for Prior Approval for Installation of external bollards, enlargement of the existing cycle storage and relocation of approved car parking for the development of planning permission P/2022/2424.
Pending
P/2026/2948
Details of conditions 6 (Detailed Drainage Design), 7 (Sustainable Drainage Scheme) and 9 (Noise) submitted pursuant to planning permission P/2024/2439 approved 09/06/2025 for the erection of a two storey industrial unit with the mixed use of offices and general industrial with associated vehicle management, servicing depot, construction of vehicle workshop, HGV and car parking, vehicle refuelling, cleaning facilities, disabled parking bays, electric charging points, refuse and cycle storage.
Pending
P/2026/2959
Erection of a front porch extension.
Pending

View Planning Timeline