Basement/Ground Floor Flat, 21 Sydney Street, London, SW3 6PU
UPRN:217085161-Beds -Built -
Tenure: -Council Tax: -EPC: -
Data freshness:Listing· freshListing: fresh, refreshed yesterday (2026-11-04T04:00:06.345886+00:00)Price Paid· freshPrice Paid: fresh, refreshed 4d ago (2026-11-01T12:48:28.390450+00:00)Planning· 3mo agoPlanning: stale, refreshed 3mo ago (2026-07-27)Risk· 5mo agoRisk: stale, refreshed 5mo ago (2026-06-18T00:00:00+00:00)Connectivity· 1mo agoConnectivity: ageing, refreshed 1mo ago (2026-10-03T06:43:10.905825+00:00)Schools· 1mo agoSchools: ageing, refreshed 1mo ago (2026-10-06T08:24:30.427161+00:00)Amenities· 1mo agoAmenities: ageing, refreshed 1mo ago (2026-09-23T00:00:00+00:00)Area· Census 2021Area: static reference data (Census 2021); authoritative and does not refresh
HP Score
65
/ 100
Mixed
Verdict
today
- Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.
Mixed signals - investigate
Evidence
18 of 21 sourcesSale Estimate
£4,127,000
£3.30M - £4.95MLow
Estimate
£4.13M
Range
£3.30M – £4.95M
Rent Estimate (pcm)
--
-- - --
Verdict
Derived from HomePortfolio scores
Basement/Ground Floor Flat earns an INVESTIGATE rating with HP Score 65/100. Investment score 64/100 reflects moderate fundamentals. Crime intensity is elevated. Walkability is excellent (98/100). Flood risk is not assessed: check the Environment Agency long-term flood map before offering. 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
65
HP Score
65/ 100
Mixed
64
Investment Score
64/ 100
Moderate
89
Crime Score
89/ 100
Elevated
98
Walkability
98/ 100
Excellent
Transit & Bike
Transit 97Bike 69
Walk Score, out of 100
Valuation & Market
Sale Estimate£4,127,000
Rent Estimate (pcm)-
Gross Yield-
1y Growth-
3y Growth-9.5%
5y Growth-4.5%
10y Growth-2.4%
Last Sold Price-
Risk Overview
- Flood RiskUnknown
- SubsidenceSignificant
- RadonLow
- MiningUnknown
- LandslideLow
- Air QualityLow
- NoiseModerate
Planning Activity
Recent Apps
4SW3 6PU
Approval Rate
0%12mo
Development
low
- Pending26/06845/TCAWorks to be done G1 Silver Birch Red dot - Remove to ground level the two small Silver Birch
- Pending26/06706/FULLInstallation of external vents to the rear/side wall at first floor level. (Linked with 26/06707/LBC)
- Pending26/06707/LBCInstallation of an internal Air Conditioning unit including external vents to the rear/side wall at first floor level (Linked with 26/06706/FULL)
Ownership
- Corporate Ownership32.6%
- Overseas OwnershipNo
- Lease Term Remaining-
- CovenantsRestrictive
- Lease Type-
- Last Ownership Change-
- SourceLand Registry
Connectivity
Broadband (Standard)
14 Mbps
Mobile 4G/5G Coverage
EEThreeO2Vodafone
EV Charger
-
PTAL Rating
-
Area Profile
Median EarningsLocal authority£46,690
Population Density6,704 /km²
Owner Occupied50%
Age Distribution
0-15 15%16-64 66%65+ 19%
Schools Nearby
- -Institute of Cancer Research0.1 mi
- Oratory Roman Catholic Primary School0.2 miOutstanding
- Our Lady of Victories RC Primary School0.3 mi
Inspected as Our Lady of Victories RC Primary School (URN 100504) on 6 Dec 2023
- Inspected by ISIMander Portman Woodward School0.3 mi
2 of 5 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.
Comparables
- 15 Sydney Street-£4.95M-
- 39 Sydney Street-£1.33M-
- 39 Sydney Street-£550k-
- 29 Sydney Street-£3.83M-