Sold House Prices on William Street, London
Every Land Registry property sale recorded on William Street in the SW1X postcode district. Updated monthly, England and Wales coverage.
Total sales
8
3 Jan 1996 – 30 Sep 2025
Average price
£3,116,656
all property types, all years
Lowest sale
£270,000
Highest sale
£15,200,000
Recorded sales on William Street
Showing 1–8 of 8 sales, newest first.
| Address | Postcode | Type | Tenure | Price | Date |
|---|---|---|---|---|---|
| 1 Apartment 9 William Street | SW1X 9HL | Flat / Apartment | Leasehold | £2,550,000 | 30 Sep 2025 |
| 1 Apartment 7 William Street | SW1X 9HL | Flat / Apartment | Leasehold | £2,650,000 | 12 Mar 2024 |
| 1 Apartment 4 William Street | SW1X 9HL | Flat / Apartment | Leasehold | £15,200,000 | 29 Sep 2023 |
| William Street House, 1 - 9 1 William Street | SW1X 9HH | Flat / Apartment | Leasehold | £270,000 | 3 Apr 2009 |
| William Street House Flat 5 William Street | SW1X 9HH | Flat / Apartment | Leasehold | £1,850,000 | 16 Aug 2004 |
| William Street House Flat 5 William Street | SW1X 9HH | Flat / Apartment | Leasehold | £1,250,000 | 25 Jul 2002 |
| William Street House Flat 5 William Street | SW1X 9HH | Flat / Apartment | Leasehold | £763,250 | 2 Aug 1999 |
| William Street House Flat 1 William Street | SW1X 9HH | Flat / Apartment | Leasehold | £400,000 | 3 Jan 1996 |
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Other streets in SW1X
Cadogan Square
570 sales · avg £2,044,323
Eaton Place
562 sales · avg £1,918,248
Lennox Gardens
449 sales · avg £1,172,139
Pont Street
418 sales · avg £1,444,260
Sloane Street
378 sales · avg £1,281,287
Knightsbridge
352 sales · avg £4,719,077
Lowndes Square
344 sales · avg £2,561,560
Hans Place
220 sales · avg £2,023,490
Cadogan Place
196 sales · avg £2,305,287
Hans Crescent
168 sales · avg £1,177,543
Chesham Street
144 sales · avg £1,763,498
Kinnerton Street
143 sales · avg £1,249,182
Contains HM Land Registry data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0. England and Wales only. Sale prices are as recorded by Land Registry and may exclude some private/below-threshold transactions.