Apartment 5, 1 William Street, London, SW1X 9HL
UPRN:10033655313Flat/Maisonette5 bedsBuilt 2021
LeaseholdCouncil Tax: Band HEPC: D (64)
Data freshness:Listing· 8mo agoListing: stale, refreshed 8mo ago (2026-03-19T13:52:17.943725+00:00)Price Paid· freshPrice Paid: fresh, refreshed 5d ago (2026-11-01T08:48:11.154109+00:00)Planning· 1mo agoPlanning: ageing, refreshed 1mo ago (2026-09-26T06:43:22.661142+00:00)EPC· 6mo agoEPC: stale, refreshed 6mo ago (2026-05-20T10:58:39.129138+00:00)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· 2mo agoAmenities: ageing, refreshed 2mo ago (2026-09-23T00:00:00+00:00)Area· Census 2021Area: static reference data (Census 2021); authoritative and does not refresh
HP Score
73
/ 100
Mixed
Verdict
yesterday
- Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.
Mixed signals - investigate
Evidence
20 of 21 sourcesSale Estimate
£2,581,000
£2.06M - £3.10MLow
Estimate
£2.58M
Range
£2.06M – £3.10M
Rent Estimate (pcm)
£10,950
£10k - £12k
Monthly
£10,950
Yield
5.09%
Verdict
Derived from HomePortfolio scores
Apartment 5 earns an INVESTIGATE rating with HP Score 73/100. Investment score 68/100 reflects moderate fundamentals. Crime intensity is elevated. Walkability is excellent (95/100). 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
73
HP Score
73/ 100
Mixed
68
Investment Score
68/ 100
Moderate
62
Crime Score
62/ 100
Elevated
95
Walkability
95/ 100
Excellent
Transit & Bike
Transit 74Bike 73
Walk Score, out of 100
Valuation & Market
Sale Estimate£2,581,000
Rent Estimate (pcm)£10,950
Gross Yield5.09%
1y Growth-
3y Growth+6.5%
5y Growth+8.8%
10y Growth+3.3%
Last Sold Price-
Risk Overview
- Flood RiskUnknown
- SubsidenceSignificant
- RadonLow
- MiningUnknown
- LandslideLow
- Air QualityLow
- NoiseHigh
Planning Activity
Recent Apps
7SW1X 9HL
Approval Rate
-12mo
Development
low
- Pending26/07367/ADLBCDetails of new coordinated service routes pursuant to condition 6 (6) of listed building consent dated 14 March 2023 (RN: 22/05005/LBC)
- Pending26/07335/ADFULLDetails of all new windows or new window components pursuant to condition 4 ( Part 2 ) of planning permission dated 09 July 2025 (RN: 25/01006/FULL). (Linked with 26/07285/ADLBC)
- Pending26/07305/FULLInstallation of an external condenser at roof level and internal insulation, replacement sashes and crittall windows/doors. Internal alterations.
Ownership
- Corporate Ownership29.9%
- Overseas OwnershipNo
- Lease Term Remaining-
- CovenantsRestrictive
- Lease TypeLeasehold
- Last Ownership Change-
- SourceLand Registry
Connectivity
Broadband (-)
-
Mobile 4G/5G Coverage
EEThreeO2Vodafone
EV Charger
-
PTAL Rating
-
Area Profile
Median EarningsLocal authority£45,172
Population Density-
Owner Occupied42%
Age Distribution
0-15 12%16-64 71%65+ 17%
Schools Nearby
- Inspected by ISICaelum House School0.3 mi
- Inspected by ISIMore House School0.4 mi
- Hill House School0.4 miOutstanding
- Inspected by ISIKnightsbridge School0.4 mi
1 of 6 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.
Comparables
- 1 William Street-£17.67M-
- 1 William Street-£1.50M-
- 1 William Street-£23.25M-
- 1 William Street-£23.25M-