Flat 67, Mortise House, 21 Chailey Place, Hayes, UB3 3FL

UPRN:10095323693Flat/MaisonetteBeds -Built 2023

LeaseholdCouncil Tax: Band CEPC: B (83)

Data freshness:Listing· freshPrice Paid· freshPlanning· 4mo agoEPC· 6mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021

Flat 67, Mortise House, 21 Chailey Place, Hayes, UB3 3FL

HP Score

/ 100

Mixed

Verdict

yesterday

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

Evidence

17 of 21 sources

Sale Estimate

£393,000

£373k - £412kHigh

Estimate

£393k

Range

£373k – £412k

Rent Estimate (pcm)

£1,900

£2k - £2k

Monthly

£1,900

Yield

6.51%

Verdict

Derived from HomePortfolio scores

Flat 67 earns an INVESTIGATE rating with HP Score 52/100. Investment score 62/100 reflects moderate fundamentals. Crime intensity is elevated. Walkability is limited (61/100). 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 listingsMarket 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 leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

52/ 100

Mixed

Investment Score

62/ 100

Moderate

100

Crime Score

100/ 100

Elevated

Walkability

61/ 100

Moderate

Transit & Bike

Transit 27Bike 59

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence1 independent sourceLead 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 edge2.5/15
claims [AVM +10.9% (HIGH), sold-comps +11.4%, £/sqft +11.4%] → measured edge +0.50pp 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 10095323693· as of 9 Oct 2026
- property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 5.4%· as of 3 Nov 2026
Rental economics11.3/40
gross yield 6.5%; range width penalty ×0.94
- valuation_snapshotsrent estimate 1900/mo (range 1800-2050)· as of 9 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -210/mo, -11% 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), 267 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 & liquidity14.7/15
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

£262,500£402,500

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£350,000

At the asking price

Monthly rent£1,900/mo

Evidenced range £1,800-£2,050

Interest rate5.4%

Loan to value75%

Cash required: £113,800
Net cash flow: £134/mo
Cash on cash: 1.4%
Score at this price: 28

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.61 - 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 10095323693Valuation edge · as of 9 Oct 2026
property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 5.4%Valuation edge · as of 3 Nov 2026
valuation_snapshotsrent estimate 1900/mo (range 1800-2050)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 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 6 Nov 2026

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 1900/mo (range 1800-2050)
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£393,000

Rent Estimate (pcm)£1,900

Gross Yield6.51%

1y Growth-

3y Growth+4.4%

5y Growth+2.0%

10y Growth+5.1%

Last Sold Price£390,000 (2023-03-16)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceModerate
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0UB3 3FL

Approval Rate

-12mo

Development

low

71544/APP/2026/2318
Erection of a part first floor rear extension.
Pending
79650/APP/2026/2306
Application under section 73A for development part carried out including the erection of a single storey wrap around extension to the side and rear (Proposed) and front porch (Retrospective).
Pending
62339/APP/2026/2204
Erection of rear outbuilding following the demolition of the existing store (Application for a Certificate of Lawful Development for a Proposed Development).
Approved

View Planning Timeline

Ownership

Corporate Ownership57.7%
Overseas OwnershipNo
Lease Term Remaining999+ yrs
CovenantsNone
Lease TypeLeasehold
Last Ownership Change2023-03-16
SourceLand Registry

View Ownership Details

Connectivity

Broadband (-)

Mobile 4G/5G Coverage

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£36,429

Population Density7,289 /km²

Owner Occupied24%

Age Distribution

0-15 24%16-64 69%65+ 7%

View Area Profile

Schools Nearby

Botwell House Catholic Primary School
0.2 mi
Good
Global Academy
0.5 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.
Minet Junior School
0.5 mi
-
Minet Infant and Nursery School
0.5 mi
Good

3 of 11 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

Mortise House, 21 Chailey Place
-
£375k
-
Mortise House, 21 Chailey Place
-
£450k
-
Mortise House, 21 Chailey Place
-
£380k
-
Mortise House, 21 Chailey Place
-
£372k
-

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