Flat 8, 81, Onslow Square has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 01 May 2026.

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

The most recent sale of Flat 8, 81, Onslow Square completed on 29th April 2004 at £1,100,000 and was recorded by HM Land Registry as a leasehold flat.

Since 1995 this is the property's only sale.

• Sold Apr 2004£1,100,000

Since 2008 36 properties similar to Flat 8, 81, Onslow Square have sold within a radius of 260 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 23rd December 2025, was Flat 8, 20, Onslow Square, London, SW7 3NP, a leasehold flat which sold for £2,280,000.

Read more about house prices in SW7.

• Sold Dec 2025£2,280,000 | 3 Bed FlatFlat 8, 20, Onslow Square, London, SW7 3NPFlat 8, 20, Onslow Square, London, SW7 3NP
• Sold Aug 2025£2,500,000 | 3 Bed FlatFlat 10, 81, Onslow Square, London, SW7 3LTFlat 10, 81, Onslow Square, London, SW7 3LT
• Sold Nov 2024£2,825,000 | 3 Bed FlatFlat 2, 23, Onslow Square, London, SW7 3NJFlat 2, 23, Onslow Square, London, SW7 3NJ
• Sold Sep 2024£1,275,000 | 3 Bed FlatBasement, 109A, Onslow Square, London, SW7 3LUBasement, 109A, Onslow Square, London, SW7 3LU
• Sold Dec 2023£2,841,500 | 3 Bed Flat62, Rose Square, London, SW3 6RS62, Rose Square, London, SW3 6RS
• Sold Oct 2023£2,600,000 | 3 Bed FlatFlat 6, 89, Onslow Square, London, SW7 3LTFlat 6, 89, Onslow Square, London, SW7 3LT
• Sold Jul 2023£2,600,000 | 3 Bed FlatFlat 6, 30, Onslow Gardens, London, SW7 3AHFlat 6, 30, Onslow Gardens, London, SW7 3AH
• Sold Oct 2022£3,100,000 | 3 Bed Flat42, Rose Square, London, SW3 6RS42, Rose Square, London, SW3 6RS
• Sold Aug 2022£875,000 | 3 Bed FlatFlat 16, 9-11 , Manson Place, London, SW7 5LTFlat 16, 9-11 , Manson Place, London, SW7 5LT
• Sold Aug 2022£3,600,000 | 3 Bed FlatFlat 1, 17, Onslow Square, London, SW7 3NJFlat 1, 17, Onslow Square, London, SW7 3NJ
• Sold Jun 2021£3,325,000 | 3 Bed FlatFlat 4, 81, Onslow Square, London, SW7 3LTFlat 4, 81, Onslow Square, London, SW7 3LT
• Sold Oct 2018£2,650,000 | 3 Bed FlatFlat 2, 52, Onslow Square, London, SW7 3NXFlat 2, 52, Onslow Square, London, SW7 3NX
• Sold Sep 2018£2,150,000 | 3 Bed FlatFlat 35, Melton Court, Onslow Crescent, London, SW7 3JQFlat 35, Melton Court, Onslow Crescent, London, SW7 3JQ
• Sold Mar 2018£5,000,000 | 3 Bed FlatFlat 1, 61, Onslow Square, London, SW7 3LSFlat 1, 61, Onslow Square, London, SW7 3LS
• Sold Jan 2017£3,000,000 | 3 Bed Flat63, Onslow Square, London, SW7 3LS63, Onslow Square, London, SW7 3LS
• Sold Mar 2015£4,100,000 | 3 Bed FlatFlat 5, 61, Onslow Square, London, SW7 3LSFlat 5, 61, Onslow Square, London, SW7 3LS
• Sold Dec 2014£3,950,000 | 3 Bed FlatFlat 6, 81, Onslow Square, London, SW7 3LTFlat 6, 81, Onslow Square, London, SW7 3LT
• Sold Jan 2011£2,250,000 | 3 Bed FlatFlat 3, 89, Onslow Square, London, SW7 3LTFlat 3, 89, Onslow Square, London, SW7 3LT
• Sold Jun 2008£2,200,000 | 3 Bed FlatFlat 2, 35, Onslow Gardens, London, SW7 3PYFlat 2, 35, Onslow Gardens, London, SW7 3PY
• Sold Mar 2008£2,950,000 | 3 Bed Flat51, Rose Square, London, SW3 6RS51, Rose Square, London, SW3 6RS

Of the 321 addresses on Onslow Square, London, SW7, Flat 8, 81, Onslow Square comes out as the 91st largest and the 96th most expensive in our analysis of the public data.

It is also £415k more expensive than the average property across the SW7 district.

• Our Lady of Victories RC Primary School

  300 m away
• Oratory Roman Catholic Primary School

  400 m away
• Marlborough Primary School

  700 m away

• St. Thomas More Language College

  900 m away
• Chelsea Academy

  1.7 km away
• The London Oratory School

  1.7 km away

• South Kensington

  |

  200 m away
• Gloucester Road

  |

  500 m away
• Earl's Court

  |

  1.2 km away

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