Flat 11, Vale Court, 21 Mallord Street, London, SW3 6AL

UPRN:217056371Flat/MaisonetteBeds -Built 1900-1929

LeaseholdCouncil Tax: -EPC: D (68)

Data freshness:Listing· freshPlanning· 4mo agoOwnership· freshEPC· 6mo agoRisk· 5mo agoConnectivity· 1mo agoAmenities· 2mo agoArea· Census 2021

Flat 11, 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

£720,000

£648k - £792kMedium

Estimate

£720k

Range

£648k – £792k

Rent Estimate (pcm)

£3,250

£3k - £4k

Monthly

£3,250

Yield

4.59%

Verdict

Derived from HomePortfolio scores

Flat 11 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 sourcesLead to verifyListing checked 11 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 edge-0.6/15
claims [AVM -18.1% (MEDIUM)] → measured edge -0.12pp of the ask; on later-registered sales an AVM discount carried no edge and a sold-evidence gap at most +0.5pp; asking more than 10% above the estimate (measured -0.33pp)
Market estimate used (MEDIUM confidence) · snapshot 13 Oct 2026
- valuation_snapshotsestimate for 217056371· as of 13 Oct 2026
Rental economics0/40
gross yield 4.6%; range width penalty ×0.86
- valuation_snapshotsrent estimate 3250/mo (range 3000-3550)· as of 13 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -1,327/mo, -41% 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 11 Nov 2026· verify before relying on this
Seller motivationNot scored
context, not scored: 0 price cut(s), 44 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 11 Nov 2026
Risk & liquidity12.8/15
190 sales/12mo in area; valuation range width 20%
- 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

£637,500£977,500

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£850,000

At the asking price

Monthly rent£3,250/mo

Evidenced range £3,000-£3,550

Interest rate5.4%

Loan to value75%

Cash required: £288,800
Net cash flow: -£619/mo
Cash on cash: -2.6%
Score at this price: 12

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.13 - below 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 217056371Valuation edge · as of 13 Oct 2026
valuation_snapshotsrent estimate 3250/mo (range 3000-3550)Rental economics · as of 13 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 11 Nov 2026 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 11 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 3250/mo (range 3000-3550)
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£720,000

Rent Estimate (pcm)£3,250

Gross Yield4.59%

1y Growth-

3y Growth-9.5%

5y Growth-4.5%

10y Growth-2.4%

Last Sold Price£600,000 (2026-02-27)

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

PA2026/0174
Alterations including excavation works to extend basement and formation of rear lightwell, erection of part single, part two storey rear/side extension. Erection of mansard roof extension to form additional level of accommodation and formation of roof terrace atop with screening. Erection or rear extension and formation of roof terrace with screening above part of part single, part two storey rear/side extension.
Pending
PA2026/0353
Alterations including replacement of 4 x Building Maintenance Units at roof level.
Pending
PA2026/0304
Details of Land Contamination pursuant to conditiond 46 of planning permission dated 12/06/2026 ref 2025/3651 (Demolition of existing buildings and site redevelopment to provide replacement care accommodation (Use Class C2), within a part 4, 5 and 7 storey building plus basement level, providing care beds and suites, with associated communal, wellness and ancillary facilities, hard and soft landscaping and associated car parking, and servicing, cycle parking, substation and plant equipment.)
Conditions

View Planning Timeline

Ownership

Corporate Ownership32.5%
Overseas OwnershipNo
Lease Term Remaining999+ yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2026-02-27
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