Flat 17, 27, Onslow Square has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 11 Feb 2010.

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

According to HM Land Registry, Flat 17, 27, Onslow Square was last sold on 10th January 2012 for £1,751,000 and was recorded as a leasehold flat.

The property has had 5 sales since 1995.

Since January 2012, the market for similar properties has dropped by 2.0%.

• Sold Jan 2012£1,751,000
• Sold Jun 2011£203,360
• Sold Aug 2010£800,000

According to the Land Registry and our network of Estate Agents, there have been 54 sales of properties similar to Flat 17, 27, Onslow Square within a radius of 290 metres since 2013.

The most recent example is Flat 29, Thurloe Court, Fulham Road, London, SW3 6SB, a leasehold flat which sold for £1,575,000 on the 19th June 2025.

Read more about house prices in SW7.

• Sold Jun 2025£1,575,000 | 3 Bed FlatFlat 29, Thurloe Court, Fulham Road, London, SW3 6SBFlat 29, Thurloe Court, Fulham Road, London, SW3 6SB
• Sold Oct 2024£1,732,000 | 2 Bed FlatFlat 1, 73, Onslow Square, London, SW7 3LSFlat 1, 73, Onslow Square, London, SW7 3LS
• Sold Aug 2024£1,014,000 | 2 Bed FlatFlat 2, Petersham House 29-37, Harrington Road, London, SW7 3HDFlat 2, Petersham House 29-37, Harrington Road, London, SW7 3HD
• Sold Apr 2024£1,400,000 | 2 Bed FlatFlat 12, 27, Onslow Square, London, SW7 3NHFlat 12, 27, Onslow Square, London, SW7 3NH
• Sold Feb 2024£1,493,500 | 2 Bed FlatFlat 14, 27, Onslow Square, London, SW7 3NHFlat 14, 27, Onslow Square, London, SW7 3NH
• Sold Jan 2024£1,530,000 | 3 Bed FlatFlat 21, Petersham House 29-37, Harrington Road, London, SW7 3HDFlat 21, Petersham House 29-37, Harrington Road, London, SW7 3HD
• Sold Oct 2023£1,200,000 | 2 Bed FlatFlat 28, Petersham House 29-37, Harrington Road, London, SW7 3HDFlat 28, Petersham House 29-37, Harrington Road, London, SW7 3HD
• Sold Sep 2022£1,795,000 | 3 Bed FlatFlat 37, Thurloe Court, Fulham Road, London, SW3 6SBFlat 37, Thurloe Court, Fulham Road, London, SW3 6SB
• Sold Aug 2022£2,000,000 | 2 Bed FlatFlat 11, Petersham House 29-37, Harrington Road, London, SW7 3HDFlat 11, Petersham House 29-37, Harrington Road, London, SW7 3HD
• Sold Jul 2022£1,070,000 | 3 Bed FlatFlat 40, Thurloe Court, Fulham Road, London, SW3 6SBFlat 40, Thurloe Court, Fulham Road, London, SW3 6SB
• Sold Feb 2022£1,180,000 | 2 Bed FlatFlat 31, Petersham House 29-37, Harrington Road, London, SW7 3HDFlat 31, Petersham House 29-37, Harrington Road, London, SW7 3HD
• Sold Oct 2021£430,000 | 3 Bed FlatFlat 6, 27, Onslow Square, London, SW7 3NHFlat 6, 27, Onslow Square, London, SW7 3NH
• Sold Sep 2021£1,385,000 | 3 Bed FlatFlat 21, Thurloe Court, Fulham Road, London, SW3 6SBFlat 21, Thurloe Court, Fulham Road, London, SW3 6SB
• Sold Nov 2019£905,000 | 2 Bed FlatFlat 24, Petersham House 29-37, Harrington Road, London, SW7 3HDFlat 24, Petersham House 29-37, Harrington Road, London, SW7 3HD
• Sold Oct 2018£1,200,000 | 2 Bed FlatFlat 19, Petersham House 29-37, Harrington Road, London, SW7 3HDFlat 19, Petersham House 29-37, Harrington Road, London, SW7 3HD
• Sold Sep 2017£1,700,000 | 2 Bed FlatFlat 10, 27, Onslow Square, London, SW7 3NHFlat 10, 27, Onslow Square, London, SW7 3NH
• Sold Oct 2014£2,275,000 | 2 Bed FlatFlat 9, 27, Onslow Square, London, SW7 3NHFlat 9, 27, Onslow Square, London, SW7 3NH
• Sold Sep 2014£1,625,000 | 2 Bed FlatFlat 1, 27, Onslow Square, London, SW7 3NHFlat 1, 27, Onslow Square, London, SW7 3NH
• Sold Oct 2013£1,700,000 | 3 Bed FlatFlat 18, 27, Onslow Square, London, SW7 3NHFlat 18, 27, Onslow Square, London, SW7 3NH
• Sold Feb 2013£1,375,000 | 2 Bed FlatFlat 8, 27, Onslow Square, London, SW7 3NHFlat 8, 27, Onslow Square, London, SW7 3NH

Onslow Square, London, SW7 has a total of 321 addresses. According to our analysis of all the public data, Flat 17, 27, Onslow Square is the 240th largest and the 268th most expensive property on the street.

When compared to the postcode district it is £784k less expensive than the average property in SW7.

• Oratory Roman Catholic Primary School

  400 m away
• Our Lady of Victories RC Primary School

  400 m away
• Marlborough Primary School

  500 m away

• St. Thomas More Language College

  800 m away
• Chelsea Academy

  1.9 km away
• The London Oratory School

  1.9 km away

• South Kensington

  |

  100 m away
• Gloucester Road

  |

  700 m away
• Knightsbridge

  |

  1.0 km away

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