25 Arbor House, Narrowboat Avenue, Brentford, TW8 8FD

UPRN:10091693246Flat/Maisonette3 bedsBuilt 2012-2021

LeaseholdCouncil Tax: Band FEPC: C (80)

Data freshness:Listing· freshPlanning· 4mo agoOwnership· 1mo agoEPC· 2mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021Council Tax· 1mo ago

25 Arbor House, Narrowboat Avenue, Brentford, TW8 8FD

HP Score

/ 100

Strong

Verdict

today

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

Evidence

19 of 21 sources

Sale Estimate

£632,000

£600k - £663kHigh

Estimate

£632k

Range

£600k – £663k

Rent Estimate (pcm)

£2,850

£3k - £3k

Monthly

£2,850

Yield

5.70%

Verdict

Derived from HomePortfolio scores

25 Arbor House earns an INVESTIGATE rating with HP Score 75/100. Investment score 68/100 reflects moderate fundamentals. Crime intensity is moderate. Walkability is good (76/100). 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

75/ 100

Strong

Investment Score

68/ 100

Moderate

Crime Score

38/ 100

Elevated

Walkability

76/ 100

High

Transit & Bike

Transit 54Bike 69

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesLead to verifyListing checked 6 Nov 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 +5.1% (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 9 Nov 2026
- valuation_snapshotsestimate for 10091693246· as of 9 Nov 2026
Rental economics4.8/40
gross yield 5.7%; range width penalty ×0.85
- valuation_snapshotsrent estimate 2850/mo (range 2600-3100)· as of 9 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -566/mo, -20% 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 6 Nov 2026· verify before relying on this
Seller motivationNot scored
context, not scored: 0 price cut(s), 76 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
175 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

£450,000£690,000

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£599,950

At the asking price

Monthly rent£2,850/mo

Evidenced range £2,600-£3,100

Interest rate5.4%

Loan to value75%

Cash required: £201,283
Net cash flow: -£52/mo
Cash on cash: -0.3%
Score at this price: 19

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.41 - 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 10091693246Valuation edge · as of 9 Nov 2026
valuation_snapshotsrent estimate 2850/mo (range 2600-3100)Rental economics · as of 9 Nov 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 6 Nov 2026 · verify before relying on this
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 2850/mo (range 2600-3100)
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. 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£632,000

Rent Estimate (pcm)£2,850

Gross Yield5.70%

1y Growth-

3y Growth-4.2%

5y Growth+1.9%

10y Growth-0.4%

Last Sold Price£520,950 (2015-06-01)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0TW8 8FD

Approval Rate

-12mo

Development

low

P/2026/3129
Details of Condition 47 (Bird Hazard Management Plan), submitted pursuant to permission P/2026/0045 dated 07/07/2026 for Demolition of the existing buildings and erection of buildings, to provide residential dwellings (Use Class C3) together with non-residential floorspace comprising; commercial, business and service floorspace (Use Class E); including retail floorspace (Use Class E(a)); and hot food takeaway (Sui-Generis); with associated hard and soft landscaping, parking and servicing, cycle and refuse stores, boundary treatments and other associated works.
Pending
P/2026/3118
Works to tree within a conservation area. Cypress (T1). Fell to ground level.
Pending
P/2026/3035
Details of Condition 36 (Secured by Design) submitted pursuant to permission P/2022/1142 dated 10/11/2022 for Demolition of the existing building and erection of four blocks ranging from three to eleven storeys to provide 333 residential units and commercial space with associated car and cycle parking, landscaping, amenity space and ancillary development.
Pending

View Planning Timeline

Ownership

Corporate Ownership28.6%
Overseas OwnershipNo
Lease Term Remaining232 yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2015-06-01
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

4 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£35,301

Population Density12,141 /km²

Owner Occupied47%

Age Distribution

0-15 16%16-64 77%65+ 7%

View Area Profile

Schools Nearby

Brentford School for Girls
0.4 mi
Area grades2024
Inspected after Ofsted withdrew the single overall grade.
St Paul's CofE Primary School
0.4 mi
Report card2026
Ofsted no longer awards a single overall grade.
Our Lady and St John's Catholic Primary School
0.5 mi
GoodImproving
The Green School for Girls
0.6 mi
Good

3 of 14 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

Arbor House Narrowboat Avenue
-
£420k
-
Arbor House Narrowboat Avenue
-
£650k
-
Arbor House Narrowboat Avenue
-
£463k
-
Arbor House Narrowboat Avenue
-
£518k
-

Boundary data not available for this property

No registered title polygon, building footprint, or street match for this property yet.

Why: No HMLR INSPIRE / OSM footprint / OS Open USRN match for this UPRN

Source: HM Land Registry INSPIRE / OpenStreetMap / OS Open USRN