Flat 4, 89, Onslow Square has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 09 Nov 2020.

The property is not connected to mains gas and has single glazed windows. It is heated using community scheme.

Flat 4, 89, Onslow Square last changed hands on 29th January 2021, selling for £2,450,000. 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 27.7% since January 2021.

• Sold Jan 2021£2,450,000

Land Registry records and our Estate Agent network show 42 sales of comparable properties within 260 metres of Flat 4, 89, Onslow Square since 2012.

Most recently, Flat 12, 35, Onslow Gardens, London, SW7 3PY, a leasehold flat, sold at £1,850,000 on the 6th March 2026.

Read more about house prices in SW7.

• Sold Mar 2026£1,850,000 | 3 Bed FlatFlat 12, 35, Onslow Gardens, London, SW7 3PYFlat 12, 35, Onslow Gardens, London, SW7 3PY
• Sold Jun 2025£1,200,000 | 3 Bed FlatFlat 34, Malvern Court, Onslow Square, London, SW7 3HYFlat 34, Malvern Court, Onslow Square, London, SW7 3HY
• Sold Mar 2025£1,300,000 | 3 Bed FlatFlat 18, Melton Court, Onslow Crescent, London, SW7 3JQFlat 18, Melton Court, Onslow Crescent, London, SW7 3JQ
• Sold Nov 2024£2,025,000 | 3 Bed FlatFlat 6, 42, Onslow Gardens, London, SW7 3PYFlat 6, 42, Onslow Gardens, London, SW7 3PY
• Sold Oct 2024£1,600,000 | 3 Bed FlatFlat 9, Glendower Mansions , Glendower Place, London, SW7 3DSFlat 9, Glendower Mansions , Glendower Place, London, SW7 3DS
• Sold Apr 2024£1,750,000 | 3 Bed FlatFlat 2B, Avenue Studios, Sydney Close, London, SW3 6HWFlat 2B, Avenue Studios, Sydney Close, London, SW3 6HW
• Sold Jun 2023£2,650,000 | 3 Bed FlatFlat 3, 6, Onslow Gardens, London, SW7 3LYFlat 3, 6, Onslow Gardens, London, SW7 3LY
• Sold Dec 2022£875,000 | 3 Bed FlatFlat 18, 9-11 , Manson Place, London, SW7 5LTFlat 18, 9-11 , Manson Place, London, SW7 5LT
• Sold Apr 2022£2,250,000 | 3 Bed FlatFlat 67, Melton Court, Onslow Crescent, London, SW7 3JHFlat 67, Melton Court, Onslow Crescent, London, SW7 3JH
• Sold Feb 2022£1,605,000 | 3 Bed FlatFlat 1, 12, Sumner Place, London, SW7 3EEFlat 1, 12, Sumner Place, London, SW7 3EE
• Sold Dec 2021£2,185,000 | 3 Bed Flat45, Rose Square, London, SW3 6RS45, Rose Square, London, SW3 6RS
• Sold Sep 2021£800,000 | 3 Bed FlatFlat 12, 42, Onslow Gardens, London, SW7 3PYFlat 12, 42, Onslow Gardens, London, SW7 3PY
• Sold Jul 2021£2,650,000 | 3 Bed FlatFlat 10, 42, Onslow Gardens, London, SW7 3PYFlat 10, 42, Onslow Gardens, London, SW7 3PY
• Sold Jun 2021£2,500,000 | 3 Bed FlatFlat 42, Melton Court, Onslow Crescent, London, SW7 3JHFlat 42, Melton Court, Onslow Crescent, London, SW7 3JH
• Sold Jun 2021£1,800,000 | 2 Bed FlatFlat 7, 6, Onslow Square, London, SW7 3NPFlat 7, 6, Onslow Square, London, SW7 3NP
• Sold Aug 2019£1,550,000 | 3 Bed FlatFlat 9, 97, Onslow Square, London, SW7 3LUFlat 9, 97, Onslow Square, London, SW7 3LU
• Sold Sep 2017£632,000 | 3 Bed FlatFlat 1, 81, Onslow Square, London, SW7 3LTFlat 1, 81, Onslow Square, London, SW7 3LT
• Sold Jan 2017£1,300,000 | 3 Bed Flat97A, Onslow Square, London, SW7 3LU97A, Onslow Square, London, SW7 3LU
• Sold Mar 2013£1,850,000 | 3 Bed FlatFlat 7, 89, Onslow Square, London, SW7 3LTFlat 7, 89, Onslow Square, London, SW7 3LT
• Sold Jan 2012£1,675,000 | 3 Bed FlatFlat 15, 35, Onslow Gardens, London, SW7 3PYFlat 15, 35, Onslow Gardens, London, SW7 3PY

Our analysis of the public data ranks Flat 4, 89, Onslow Square as the 187th largest and the 179th most expensive of the 321 addresses on Onslow Square, London, SW7.

Against the SW7 postcode district average, it is £329k less 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.