14 Penwerris Avenue, Isleworth, TW7 4QX

UPRN:100021571994Semi-Detached House4 bedsBuilt 1930-1949

FreeholdCouncil Tax: Band FEPC: D (68)

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

HP Score

/ 100

Mixed

Verdict

6 days ago

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

Evidence

18 of 21 sources

Sale Estimate

£1,095,000

£1.04M - £1.15MHigh

Estimate

£1.09M

Range

£1.04M – £1.15M

Rent Estimate (pcm)

£4,700

£4k - £5k

Monthly

£4,700

Yield

5.37%

Verdict

Derived from HomePortfolio scores

14 Penwerris Avenue earns an INVESTIGATE rating with HP Score 74/100. Investment score 64/100 reflects moderate fundamentals. Crime intensity is low. Walkability is limited (54/100). 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 covenantsHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

74/ 100

Mixed

Investment Score

64/ 100

Moderate

Crime Score

21/ 100

Moderate

Walkability

54/ 100

Moderate

Transit & Bike

Transit 46Bike 60

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 edge0/15
claims [AVM +4.1% (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 13 Oct 2026
- valuation_snapshotsestimate for 100021571994· as of 13 Oct 2026
Rental economics2.4/40
gross yield 5.4%; range width penalty ×0.82
- valuation_snapshotsrent estimate 4700/mo (range 4250-5150)· as of 13 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -1,105/mo, -24% 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 4 Nov 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 31 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 & 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

£787,500£1,207,500

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£1,050,000

At the asking price

Monthly rent£4,700/mo

Evidenced range £4,250-£5,150

Interest rate5.4%

Loan to value75%

Cash required: £365,050
Net cash flow: -£290/mo
Cash on cash: -1.0%
Score at this price: 17

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.33 - 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 100021571994Valuation edge · as of 13 Oct 2026
valuation_snapshotsrent estimate 4700/mo (range 4250-5150)Rental economics · as of 13 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by 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 4700/mo (range 4250-5150)
Seller motivation could not be scored
context, not scored: 0 price cut(s), 31 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£1,095,000

Rent Estimate (pcm)£4,700

Gross Yield5.37%

1y Growth-

3y Growth-0.6%

5y Growth+0.2%

10y Growth+1.2%

Last Sold Price£300,000 (2002-09-04)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

1TW7 4QX

Approval Rate

100%12mo

Development

low

P/2026/3142
Works to two trees in a front garden within a conservation area. T1 Japanese Maple (Acer palmatum). Reducing the height and spread of the tree by approximately 1-1.5m to tidy and contain, retaining furnishing growth. Final height 3m and final spread 3m. T2 Common Myrtle (Myrtus communis). Reducing the height and spread of the tree by approximately 1-1.5m to tidy and contain, retaining furnishing growth. Final height 3m and final spread 1.5m.
Pending
P/2026/3120
Certificate of lawfulness for the proposed erection of a detached outbuilding in the rear garden.
Pending
P/2026/3119
Non material amendment to remove reference to the duration of the planning permission from the description of development so that the temporary period is controlled solely through the relevant planning condition of planning permission P/2025/2201 for the variation of Condition 2 (Approved Plans) to allow the introduction of a recovery garden and Condition 4 to reference the latest Community Use Plan for the site following planning permission 00647/C/P24 and P/2023/3620 dated 19 June 2024 for the variation of Condition 27 (pedestrian access point) to allow substitution of the drawing showing details of the new pedestrian access point following planning permission 00647/C/P19 and P/2022/3464 dated 27 October 2023 for the variation of Condition 2 (approved plans) to allow changes to the lighting within the private road and car park of planning permission 00647/C/P17 and P/2022/1518 approved 4 August 2022 for the erection of a part two storey, part single storey training centre, a single s... read more
Pending

View Planning Timeline