20 Sydney Street, London, SW3 6PP

UPRN:217105481Terrace Property4 bedsBuilt -

FreeholdCouncil Tax: Band HEPC: -

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

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

£4,051,000

£3.24M - £4.86MLow

Estimate

£4.05M

Range

£3.24M – £4.86M

Rent Estimate (pcm)

£14,300

£13k - £16k

Monthly

£14,300

Yield

21.58%

Verdict

Derived from HomePortfolio scores

20 Sydney Street earns an INVESTIGATE rating with HP Score 65/100. Investment score 64/100 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 freehold. Every figure here comes from the live HomePortfolio API; anything it does not publish is left out.

Key SourcesPortal listingsOfcom Connected NationsOfcom mobile coverageMarket 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

65/ 100

Mixed

Investment Score

64/ 100

Moderate

Crime Score

89/ 100

Elevated

Walkability

99/ 100

Excellent

Transit & Bike

Transit 92Bike 69

Walk Score, out of 100

Opportunity

Not scored as an opportunity

We will not put a number on this one.

listing is a flat but the valuation basis is the whole house at this UPRN - value evidence is not comparable

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£795,000

At the asking price

Monthly rent£14,300/mo

Evidenced range £12,900-£15,750

Interest rate5.4%

Loan to value75%

Cash required: £269,550
Net cash flow: £7,217/mo
Cash on cash: 32.1%
Score at this price: -

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 5.33 - clears the usual 1.25 test. These are your assumptions, not evidence: only the pre-filled rent and price come from the record.

Risks

What could kill this deal

Score confidence is low
largely a single source - treat the number as a prompt, not a conclusion

Property risk deep-dive →flood, subsidence, crime, environment - the full domain

Plan

Before you offer

1. 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£4,051,000

Rent Estimate (pcm)£14,300

Gross Yield21.58%

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
NoiseHigh

View Full Risk Report

Planning Activity

Recent Apps

0SW3 6PP

Approval Rate

-12mo

Development

low

26/07006/LBC
Internal alterations at second floor level, including alterations to internal partitions and openings, relocation of the kitchen, alterations to bathroom facilities, removal of the existing fireplace surround and hearth, installation of new timber flooring, and associated works.
Approved
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

View Planning Timeline

Ownership

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

View Ownership Details

Connectivity

Broadband (Standard)

14 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£46,690

Population Density6,704 /km²

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
Our Lady of Victories RC Primary School
0.3 mi
Inspected as Our Lady of Victories RC Primary School (URN 100504) on 6 Dec 2023
Mander Portman Woodward School
0.3 mi
Inspected by ISI

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

View All Schools

Comparables

View All

36 Sydney Street
-
£1.47M
-
10 Sydney Street
-
£1.39M
-
10 Sydney Street
-
£1.18M
-
10 Sydney Street
-
£800k
-

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