Over the past 2 years 575 properties have sold within 360 metres of 3, William Street, per the Land Registry and our network of Estate Agents.

The latest, on the 30th September 2025, was Apartment 9, 1, William Street, London, SW1X 9HL, a leasehold flat which sold for £2,550,000.

Read more about house prices in SW1.

• Sold Sep 2025£2,550,000 | 3 Bed FlatApartment 9, 1, William Street, London, SW1X 9HLApartment 9, 1, William Street, London, SW1X 9HL
• Sold Mar 2024£2,650,000 | 3 Bed FlatApartment 7, 1, William Street, London, SW1X 9HLApartment 7, 1, William Street, London, SW1X 9HL
• Sold Sep 2023£15,200,000 | 3 Bed FlatApartment 4, 1, William Street, London, SW1X 9HLApartment 4, 1, William Street, London, SW1X 9HL

•Nearby is defined as the radius comprising the nearest 2,000 addresses.

Over the past 2 years our Estate Agent network has recorded 1 let within 360 metres of 3, William Street.

The latest, in November 2025, was Flat 56, Lincoln House, Basil Street, London, SW3 1AW, a leasehold flat let by Maplewood Property.

• 
  Let agreed Nov 2025£ Undisclosed | 2 Bed FlatFlat 56, Lincoln House, Basil Street, London, SW3 1AWFlat 56, Lincoln House, Basil Street, London, SW3 1AW

•Nearby is defined as the radius comprising the nearest 2,000 addresses.

• St George's Hanover Square CofE Primary School

  900 m away
• Holy Trinity CofE Primary School

  1.0 km away
• St Peter's Eaton Square CofE Primary School

  1.0 km away

• St. Thomas More Language College

  1.0 km away
• Westminster City School

  1.4 km away
• The Grey Coat Hospital

  1.8 km away

• Knightsbridge

  |

  400 m away
• Hyde Park Corner

  |

  400 m away
• Sloane Square

  |

  1.1 km away

The flood risk here is rated Very Low, based on Environment Agency data.