William Street, SW1X
Street in London
Median, last 3 years
£2,650,000
5 sales, Jun 2023 – May 2026
Last standard sale
£1,500,000
20 Jan 2026
Standard sales
10
since 1996
Figures count standard sales only (Price Paid category A). Additional entries (category B) - repossessions, buy-to-lets with an identifiable mortgage, and purchases by companies and other non-private buyers - are listed below but flagged.
Sale history (10 records · 2 homes sold more than once)
| Address | Postcode | Date | Type | Price |
|---|---|---|---|---|
|
APARTMENT 9, 1, WILLIAM STREET
SW1X 9HL · 20 Jan 2026
· Flat / maisonette
Previously £2,550,000 (Sep 2025) · −41%
|
SW1X 9HL | 20 Jan 2026 | Flat / maisonette | £1,500,000 |
|
APARTMENT 6, 1, WILLIAM STREET
SW1X 9HL · 21 Nov 2025
· Flat / maisonette
|
SW1X 9HL | 21 Nov 2025 | Flat / maisonette | £23,250,000 |
|
APARTMENT 9, 1, WILLIAM STREET
SW1X 9HL · 30 Sep 2025
· Flat / maisonette
|
SW1X 9HL | 30 Sep 2025 | Flat / maisonette | £2,550,000 |
|
APARTMENT 7, 1, WILLIAM STREET
SW1X 9HL · 12 Mar 2024
· Flat / maisonette
|
SW1X 9HL | 12 Mar 2024 | Flat / maisonette | £2,650,000 |
|
APARTMENT 4, 1, WILLIAM STREET
SW1X 9HL · 29 Sep 2023
· Flat / maisonette
|
SW1X 9HL | 29 Sep 2023 | Flat / maisonette | £15,200,000 |
|
1, WILLIAM STREET HOUSE, 1 - 9, WILLIAM STREET
SW1X 9HH · 3 Apr 2009
· Flat / maisonette
|
SW1X 9HH | 3 Apr 2009 | Flat / maisonette | £270,000 |
|
FLAT 5, WILLIAM STREET HOUSE, WILLIAM STREET
SW1X 9HH · 16 Aug 2004
· Flat / maisonette
Previously £1,250,000 (Jul 2002) · +48%
|
SW1X 9HH | 16 Aug 2004 | Flat / maisonette | £1,850,000 |
|
FLAT 5, WILLIAM STREET HOUSE, WILLIAM STREET
SW1X 9HH · 25 Jul 2002
· Flat / maisonette
Previously £763,250 (Aug 1999) · +64%
|
SW1X 9HH | 25 Jul 2002 | Flat / maisonette | £1,250,000 |
|
FLAT 5, WILLIAM STREET HOUSE, WILLIAM STREET
SW1X 9HH · 2 Aug 1999
· Flat / maisonette
|
SW1X 9HH | 2 Aug 1999 | Flat / maisonette | £763,250 |
|
FLAT 1, WILLIAM STREET HOUSE, WILLIAM STREET
SW1X 9HH · 3 Jan 1996
· Flat / maisonette
|
SW1X 9HH | 3 Jan 1996 | Flat / maisonette | £400,000 |