18, Alexander Square occupies a 140 m² plot as recorded by HM Land Registry.

All 7 other houses in this postcode have recorded plot sizes, and this one ranks as the 6th largest.

18, Alexander Square has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 04 Jan 2023.

The property is connected to mains gas and has partial double glazing. It is heated using a boiler and radiators (mains gas).

18, Alexander Square last changed hands on 1st March 2023, selling for £7,750,000. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold 3 times since 1995.

The market for similar properties has dropped by 38.9% since March 2023.

• Sold Mar 2023£7,750,000
• Sold Mar 1998£2,100,000
• Sold Dec 1995£1,200,000

Land Registry records and our Estate Agent network show 17 sales of comparable properties within 310 metres of 18, Alexander Square since 2013.

Most recently, 14, Pelham Crescent, London, SW7 2NP, a freehold house, sold at £7,100,000 on the 23rd February 2026.

Read more about house prices in SW3.

• Sold Feb 2026£7,100,000 | 5 Bed House14, Pelham Crescent, London, SW7 2NP14, Pelham Crescent, London, SW7 2NP
• Sold Nov 2025£10,000,000 | 5 Bed House59, Egerton Crescent, London, SW3 2ED59, Egerton Crescent, London, SW3 2ED
• Sold Mar 2025£7,750,000 | 5 Bed House7, Alexander Square, London, SW3 2AY7, Alexander Square, London, SW3 2AY
• Sold Sep 2024£9,055,000 | 6 Bed House37, Thurloe Square, London, SW7 2SR37, Thurloe Square, London, SW7 2SR
• Sold Dec 2022£9,000,000 | 6 Bed House16, Pelham Place, London, SW7 2NH16, Pelham Place, London, SW7 2NH
• Sold Aug 2022£7,165,000 | 5 Bed House12, Alexander Square, London, SW3 2AY12, Alexander Square, London, SW3 2AY
• Sold Jul 2022£7,870,000 | 5 Bed House6, Alexander Square, London, SW3 2AY6, Alexander Square, London, SW3 2AY
• Sold Apr 2022£11,565,000 | 6 Bed House31, Egerton Crescent, London, SW3 2EB31, Egerton Crescent, London, SW3 2EB
• Sold Jun 2021£6,500,000 | 5 Bed House14, Alexander Square, London, SW3 2AX14, Alexander Square, London, SW3 2AX
• Sold Jun 2021£7,500,000 | 6 Bed House2, Pelham Crescent, London, SW7 2NP2, Pelham Crescent, London, SW7 2NP
• Sold May 2021£5,850,000 | 6 Bed House11, Thurloe Street, London, SW7 2SS11, Thurloe Street, London, SW7 2SS
• Sold Mar 2021£5,645,000 | 5 Bed House11, Alexander Square, London, SW3 2AY11, Alexander Square, London, SW3 2AY
• Sold Jan 2021£15,000,000 | 6 Bed House19, Pelham Place, London, SW7 2NQ19, Pelham Place, London, SW7 2NQ
• Sold Jul 2020£13,750,000 | 5 Bed House44, Egerton Crescent, London, SW3 2ED44, Egerton Crescent, London, SW3 2ED
• Sold Sep 2017£6,750,000 | 5 Bed House10, Alexander Square, London, SW3 2AY10, Alexander Square, London, SW3 2AY
• Sold Jan 2015£12,150,000 | 6 Bed House28, Thurloe Square, London, SW7 2SD28, Thurloe Square, London, SW7 2SD
• Sold Feb 2013£6,700,000 | 6 Bed House5, Thurloe Street, London, SW7 2SS5, Thurloe Street, London, SW7 2SS

Our analysis of the public data ranks 18, Alexander Square as the 8th largest and the 7th most expensive of the 20 addresses on Alexander Square, London, SW3.

Against the SW3 postcode district average, it is £5.625m more expensive than the typical property.

• Marlborough Primary School

  300 m away
• Oratory Roman Catholic Primary School

  500 m away
• St Joseph's Catholic Primary School

  600 m away

• St. Thomas More Language College

  600 m away
• Chelsea Academy

  2.1 km away
• Westminster City School

  2.1 km away

• South Kensington

  |

  300 m away
• Knightsbridge

  |

  700 m away
• Gloucester Road

  |

  900 m away

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