Flat 18, Basil Mansions has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 11 Oct 2018.

The property is connected to mains gas and has single glazed windows. It is heated using Community scheme.

Flat 18, Basil Mansions last changed hands on 20th June 2019, selling for £4,500,000. The transaction was logged as a leasehold flat by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has dropped by 19.9% since June 2019.

• Sold Jun 2019£4,500,000

Land Registry records and our Estate Agent network show 10 sales of comparable properties within 250 metres of Flat 18, Basil Mansions across the last 2 years.

Most recently, Flat 12, Basil Mansions, Basil Street, London, SW3 1AP, a leasehold flat, sold at £5,550,000 on the 9th June 2022.

Read more about house prices in SW3.

• Sold Jun 2022£5,550,000 | 3 Bed FlatFlat 12, Basil Mansions, Basil Street, London, SW3 1APFlat 12, Basil Mansions, Basil Street, London, SW3 1AP
• Sold May 2018£4,000,000 | 3 Bed FlatFlat 4, Wellington Court 116, Knightsbridge, London, SW1X 7PLFlat 4, Wellington Court 116, Knightsbridge, London, SW1X 7PL
• Sold Jan 2013£5,800,000 | 3 Bed FlatFlat 17, Basil Mansions, Basil Street, London, SW3 1APFlat 17, Basil Mansions, Basil Street, London, SW3 1AP

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

Agents in our network have reported 1 letting within 250 metres of Flat 18, Basil Mansions across the last 2 years.

The newest of these is Flat 56, Lincoln House, Basil Street, London, SW3 1AW, a leasehold flat let by Maplewood Property in November 2025.

• 
  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.

Our analysis of the public data ranks Flat 18, Basil Mansions as the 11th largest and the 13th most expensive of the 233 addresses on Basil Street, London, SW3.

Against the SW3 postcode district average, it is £2.127m more expensive than the typical property.

• Holy Trinity CofE Primary School

  800 m away
• St Joseph's Catholic Primary School

  800 m away
• Marlborough Primary School

  900 m away

• St. Thomas More Language College

  800 m away
• Westminster City School

  1.5 km away
• The Grey Coat Hospital

  1.9 km away

• Knightsbridge

  |

  100 m away
• Hyde Park Corner

  |

  600 m away
• Sloane Square

  |

  900 m away

Environment Agency data suggests this area has a Very Low risk of flooding.