Flat 16, Vale Court, 21 Mallord Street, London, SW3 6AL

UPRN:217056376Flat/Maisonette1 bedsBuilt 1930-1949

LeaseholdCouncil Tax: -EPC: D (68)

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

Flat 16, Vale Court, 21 Mallord Street, London, SW3 6AL

HP Score

/ 100

Strong

Verdict

yesterday

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

Evidence

20 of 21 sources

Sale Estimate

£681,000

£647k - £715kHigh

Estimate

£681k

Range

£647k – £715k

Rent Estimate (pcm)

£3,100

£3k - £3k

Monthly

£3,100

Yield

5.31%

Verdict

Derived from HomePortfolio scores

Flat 16 earns an INVESTIGATE rating with HP Score 76/100. Investment score 64/100 reflects moderate fundamentals. Crime intensity is moderate. 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

76/ 100

Strong

Investment Score

64/ 100

Moderate

Crime Score

51/ 100

Elevated

Walkability

99/ 100

Excellent

Transit & Bike

Transit 62Bike 71

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 5 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 -2.8% (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 13 Oct 2026
- valuation_snapshotsestimate for 217056376· as of 13 Oct 2026
Rental economics2.2/40
gross yield 5.3%; range width penalty ×0.88
- valuation_snapshotsrent estimate 3100/mo (range 2850-3350)· as of 13 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -805/mo, -26% 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 5 Nov 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 58 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 5 Nov 2026
Risk & liquidity14.6/15
190 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

£525,000£805,000

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£700,000

At the asking price

Monthly rent£3,100/mo

Evidenced range £2,850-£3,350

Interest rate5.4%

Loan to value75%

Cash required: £236,300
Net cash flow: -£216/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): 1.31 - 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 217056376Valuation edge · as of 13 Oct 2026
valuation_snapshotsrent estimate 3100/mo (range 2850-3350)Rental economics · as of 13 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 5 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 5 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 3100/mo (range 2850-3350)
Seller motivation could not be scored
context, not scored: 0 price cut(s), 58 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. 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£681,000

Rent Estimate (pcm)£3,100

Gross Yield5.31%

1y Growth+4.5%

3y Growth-9.5%

5y Growth-4.5%

10y Growth-2.4%

Last Sold Price£682,000 (2023-09-15)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0SW3 6AL

Approval Rate

-12mo

Development

low

2026/3174
Erection of single storey rear extension.
Pending
2026/3156
As Per Report T001 - Lebanon Cedar (6 Months) Sever climbing plant T004 - London Plane (1 Year) Re-pollard T005 - London Plane (1 Year) Re-pollard T008 - London Plane (1 Year) Re-pollard T009 - London Plane (1 Year) Re-pollard T010 - London Plane (1 Year) Re-pollard T011 - London Plane (1 Year) Re-pollard T013 -Winter-flowering Cherry (1 Year) Fell as close to ground level as possible. ALL ITEMS INCLUDING REMOVING ARISING DEBRIS, LEAVING SITE CLEAN AND TIDY.
Pending
2026/2950
Details of written scheme of investigation; cycle parking details; CEMP; BNG plan and statutory metric; future district heating network connection feasibility study, obscure glazing and site levels pursuant to conditions 3, 11, 20, 23, 25, 46 and 48 of planning permission dated 11/06/2026 ref 2025/0799 (Erection of a two-storey extension above the front part of the southern building facing Howie Street and the erection of a part four and part eight storey extension to the central and northern part of the building fronting Elcho Street including a new basement, to provide additional floor space (Use Class E(g)(ii)(Research and development of products or processes)) and associated ancillary floorspace.)
Pending

View Planning Timeline

Ownership

Corporate Ownership32.6%
Overseas OwnershipNo
Lease Term Remaining999+ yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2023-09-15
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

8 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£46,690

Population Density10,637 /km²

Owner Occupied56%

Age Distribution

0-15 17%16-64 67%65+ 16%

View Area Profile

Schools Nearby

Cameron Vale School
0.1 mi
Inspected by ISI
Park Walk Primary School
0.1 mi
Report card2026
Ofsted no longer awards a single overall grade.
Francis Holland Preparatory School
0.2 mi
Inspected by ISI
Chelsea Open Air Nursery School
0.3 mi
Outstanding

3 of 7 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

Vale Court, 21 Mallord Street
-
£1.67M
-
Vale Court, 21 Mallord Street
-
£600k
-
Vale Court, 21 Mallord Street
-
£875k
-
Vale Court, 21 Mallord Street
-
£682k
-

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