Flat 1, 53 Sydney Street, London, SW3 6PX

UPRN:217085205Converted Flat3 bedsBuilt before 1900

LeaseholdCouncil Tax: Band GEPC: D (58)

Data freshness:Price Paid· freshPlanning· 3mo agoEPC· 6mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· freshAmenities· 1mo agoArea· Census 2021

Flat 1, 53 Sydney Street, London, SW3 6PX

HP Score

/ 100

Mixed

Verdict

today

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

Evidence

18 of 21 sources

Sale Estimate

£987,000

£790k - £1.19MLow

Estimate

£987k

Range

£790k – £1.19M

Rent Estimate (pcm)

£4,500

£4k - £5k

Monthly

£4,500

Yield

5.81%

Verdict

Derived from HomePortfolio scores

Flat 1 earns an INVESTIGATE rating with HP Score 66/100. Investment score 68/100 reflects moderate fundamentals. Crime intensity is elevated. 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 NationsMarket estimates (third-party AVM)Defra 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

66/ 100

Mixed

Investment Score

68/ 100

Moderate

Crime Score

89/ 100

Elevated

Walkability

99/ 100

Excellent

Transit & Bike

Transit 84Bike 69

Walk Score, out of 100

Opportunity

Not scored as an opportunity

We will not put a number on this one.

headline score requires valuation_edge (estimate confidence LOW below scoring floor)

What we could establish

Rental economics5.6/40
gross yield 5.8%; range width penalty ×0.87
- valuation_snapshotsrent estimate 4500/mo (range 4100-4850)· as of 10 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -746/mo, -17% 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 30 Oct 2026· verify before relying on this
Risk & liquidity9.2/15
190 sales/12mo in area; valuation range width 40%
- property_intelligencetransactions_12mo

Withholding a score is deliberate. A number built on missing or stale inputs would look more certain than the evidence allows.

Economics

What happens to your money

Your assumptions

Purchase price£930,000

At the asking price

Monthly rent£4,500/mo

Evidenced range £4,100-£4,850

Interest rate5.4%

Loan to value75%

Cash required: £317,050
Net cash flow: -£23/mo
Cash on cash: -0.1%
Score at this price: -

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.43 - 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_snapshotsrent estimate 4500/mo (range 4100-4850)Rental economics · as of 10 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 30 Oct 2026 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 30 Oct 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
Valuation edge could not be scored
estimate confidence LOW below scoring floor
Rental economics needs verification before you rely on it
rent estimate 4500/mo (range 4100-4850)

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. Fill the valuation edge gap before relying on the score.
estimate confidence LOW below scoring floor
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£987,000

Rent Estimate (pcm)£4,500

Gross Yield5.81%

1y Growth-

3y Growth-9.5%

5y Growth-4.5%

10y Growth-2.4%

Last Sold Price-

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

3SW3 6PX

Approval Rate

100%12mo

Development

low

26/06845/TCA
Works to be done G1 Silver Birch Red dot - Remove to ground level the two small Silver Birch
Pending
26/06706/FULL
Installation of external vents to the rear/side wall at first floor level. (Linked with 26/06707/LBC)
Pending
26/06707/LBC
Installation of an internal Air Conditioning unit including external vents to the rear/side wall at first floor level (Linked with 26/06706/FULL)
Pending

View Planning Timeline

Ownership

Corporate Ownership32.6%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change-
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

16 Mbps

Mobile 4G/5G Coverage

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£46,690

Population Density-

Owner Occupied50%

Age Distribution

0-15 15%16-64 66%65+ 19%

View Area Profile

Schools Nearby

Institute of Cancer Research
0.1 mi
-
Oratory Roman Catholic Primary School
0.1 mi
Outstanding
Francis Holland Preparatory School
0.3 mi
Inspected by ISI
Marlborough Primary School
0.3 mi
Area grades2024
Inspected after Ofsted withdrew the single overall grade.

2 of 5 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

41 Sydney Street
-
£2.40M
-
61 Sydney Street
-
£4.25M
-
45 Sydney Street
-
£900k
-
59 Sydney Street
-
£4.20M
-

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