Flat 9, 27, Onslow Square has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 20 Dec 2022.

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

The most recent sale of Flat 9, 27, Onslow Square completed on 31st October 2014 at £2,275,000 and was recorded by HM Land Registry as a leasehold flat.

Since 1995 the property has sold 3 times.

Values of comparable properties have dropped by 24.5% over the period since October 2014.

• Sold Oct 2014£2,275,000
• Sold Jun 2012£1,600,000
• Sold Apr 1997£58,462

Since 2012 58 properties similar to Flat 9, 27, Onslow Square have sold within a radius of 290 metres, per the Land Registry and our network of Estate Agents.

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

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 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 Mar 2022£1,560,000 | 3 Bed FlatFlat 9, Thurloe Court, Fulham Road, London, SW3 6SBFlat 9, 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 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 Sep 2015£1,382,500 | 2 Bed FlatFlat 26, Petersham House 29-37, Harrington Road, London, SW7 3HDFlat 26, Petersham House 29-37, Harrington Road, London, SW7 3HD
• 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
• Sold Jan 2012£1,751,000 | 2 Bed FlatFlat 17, 27, Onslow Square, London, SW7 3NHFlat 17, 27, Onslow Square, London, SW7 3NH

Of the 321 addresses on Onslow Square, London, SW7, Flat 9, 27, Onslow Square comes out as the 231st largest and the 260th most expensive in our analysis of the public data.

It is also £733k less expensive than the average property across the SW7 district.

• 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

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