Flat 6, 81, Onslow Square has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 11 Oct 2022.

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

According to HM Land Registry, Flat 6, 81, Onslow Square was last sold on 15th December 2014 for £3,950,000 and was recorded as a leasehold flat.

The property has had 2 sales since 1995.

Since December 2014, the market for similar properties has dropped by 39.8%.

• Sold Dec 2014£3,950,000
• Sold Jun 1997£775,000

According to the Land Registry and our network of Estate Agents, there have been 37 sales of properties similar to Flat 6, 81, Onslow Square within a radius of 260 metres since 2008.

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

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 Nov 2025£2,750,000 | 3 Bed FlatFlat 2, 11, Onslow Square, London, SW7 3NJFlat 2, 11, Onslow Square, London, SW7 3NJ
• 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 Feb 2016£2,550,000 | 3 Bed FlatFlat 1, 46, Onslow Square, London, SW7 3NXFlat 1, 46, Onslow Square, London, SW7 3NX
• 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

Onslow Square, London, SW7 has a total of 321 addresses. According to our analysis of all the public data, Flat 6, 81, Onslow Square is the 109th largest and the 99th most expensive property on the street.

When compared to the postcode district it is £405k more expensive than the average property in SW7.

• 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

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.