Flat 5, 81, Onslow Square has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 29 Sep 2020.

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

Flat 5, 81, Onslow Square last changed hands on 30th June 2006, selling for £2,200,000. The transaction was logged as a leasehold flat by HM Land Registry.

In total it has sold 4 times since 1995.

• Sold Jun 2006£2,200,000
• Sold Dec 2003£1,430,000
• Sold May 2002£1,300,000

Land Registry records and our Estate Agent network show 25 sales of comparable properties within 260 metres of Flat 5, 81, Onslow Square since 2013.

Most recently, Flat 5, 21, Onslow Gardens, London, SW7 3AL, a leasehold flat, sold at £3,700,000 on the 13th February 2026.

Read more about house prices in SW7.

• Sold Feb 2026£3,700,000 | 4 Bed FlatFlat 5, 21, Onslow Gardens, London, SW7 3ALFlat 5, 21, Onslow Gardens, London, SW7 3AL
• Sold Sep 2025£3,650,000 | 3 Bed Flat60, Rose Square, London, SW3 6RS60, Rose Square, London, SW3 6RS
• Sold Jul 2025£3,000,000 | 4 Bed FlatFlat 1, 42, Onslow Gardens, London, SW7 3PYFlat 1, 42, Onslow Gardens, London, SW7 3PY
• Sold Apr 2025£3,500,000 | 3 Bed Flat47, Rose Square, London, SW3 6RS47, Rose Square, London, SW3 6RS
• Sold Sep 2024£2,600,000 | 3 Bed Flat38, Rose Square, London, SW3 6RS38, Rose Square, London, SW3 6RS
• Sold Sep 2024£3,700,000 | 4 Bed Flat2, Onslow Square, London, SW7 3NP2, Onslow Square, London, SW7 3NP
• Sold Jul 2023£3,750,000 | 4 Bed FlatFlat 2, 43, Onslow Square, London, SW7 3LRFlat 2, 43, Onslow Square, London, SW7 3LR
• Sold Jun 2022£3,500,000 | 3 Bed Flat65, Rose Square, London, SW3 6RS65, Rose Square, London, SW3 6RS
• Sold Sep 2021£3,500,000 | 3 Bed Flat64, Rose Square, London, SW3 6RS64, Rose Square, London, SW3 6RS
• Sold Sep 2021£4,100,000 | 4 Bed FlatFlat 3, 43, Onslow Square, London, SW7 3LRFlat 3, 43, Onslow Square, London, SW7 3LR
• Sold Aug 2021£11,500,000 | 4 Bed Flat43, Onslow Gardens, London, SW7 3PY43, Onslow Gardens, London, SW7 3PY
• Sold Mar 2021£4,250,000 | 4 Bed Flat33, Onslow Gardens, London, SW7 3AQ33, Onslow Gardens, London, SW7 3AQ
• Sold Feb 2020£3,870,000 | 3 Bed Flat68, Rose Square, London, SW3 6RS68, Rose Square, London, SW3 6RS
• Sold Dec 2019£4,225,000 | 3 Bed Flat26, Rose Square, London, SW3 6RS26, Rose Square, London, SW3 6RS
• Sold Oct 2018£3,400,000 | 4 Bed FlatFlat 8, 78, Onslow Gardens, London, SW7 3QBFlat 8, 78, Onslow Gardens, London, SW7 3QB
• Sold Jan 2018£3,750,000 | 3 Bed Flat5, Rose Square, London, SW3 6RS5, Rose Square, London, SW3 6RS
• Sold Dec 2017£3,050,000 | 4 Bed FlatFlat 1, 35, Onslow Gardens, London, SW7 3PYFlat 1, 35, Onslow Gardens, London, SW7 3PY
• Sold Feb 2017£2,250,000 | 3 Bed Flat21, Sydney Mews, London, SW3 6HL21, Sydney Mews, London, SW3 6HL
• Sold Apr 2015£4,250,000 | 4 Bed FlatFlat 7, 81, Onslow Square, London, SW7 3LTFlat 7, 81, Onslow Square, London, SW7 3LT
• Sold Dec 2013£3,700,000 | 3 Bed Flat54, Rose Square, London, SW3 6RS54, Rose Square, London, SW3 6RS

Our analysis of the public data ranks Flat 5, 81, Onslow Square as the 27th largest and the 40th most expensive of the 321 addresses on Onslow Square, London, SW7.

Against the SW7 postcode district average, it is £1.46m more expensive than the typical property.

• 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

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