Flat 20, 27, Onslow Square has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 18 Jul 2022.

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 20, 27, Onslow Square was last sold on 17th September 2002 for £420,000 and was recorded as a leasehold flat.

The property has only had this single sale since 1995.

• Sold Sep 2002£420,000

According to the Land Registry and our network of Estate Agents, there have been 39 sales of properties similar to Flat 20, 27, Onslow Square within a radius of 290 metres since 2007.

The most recent example is Flat 20, Petersham House 29-37, Harrington Road, London, SW7 3HD, a leasehold flat which sold for £650,000 on the 18th May 2026.

Read more about house prices in SW7.

• Sold May 2026£650,000 | 2 Bed FlatFlat 20, Petersham House 29-37, Harrington Road, London, SW7 3HDFlat 20, Petersham House 29-37, Harrington Road, London, SW7 3HD
• Sold Dec 2025£933,500 | 2 Bed FlatFlat 14, Petersham House 29-37, Harrington Road, London, SW7 3HDFlat 14, Petersham House 29-37, Harrington Road, London, SW7 3HD
• 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£1,150,000 | 2 Bed FlatFlat 36, Thurloe Court, Fulham Road, London, SW3 6SBFlat 36, Thurloe Court, Fulham Road, London, SW3 6SB
• 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 Nov 2023£1,050,000 | 2 Bed FlatFlat 2, 27, Onslow Square, London, SW7 3NHFlat 2, 27, Onslow Square, London, SW7 3NH
• Sold Mar 2022£1,130,000 | 2 Bed FlatFlat 11, 27, Onslow Square, London, SW7 3NHFlat 11, 27, Onslow Square, London, SW7 3NH
• 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 Jun 2021£1,310,000 | 2 Bed FlatFlat 10, 48, Thurloe Square, London, SW7 2SXFlat 10, 48, Thurloe Square, London, SW7 2SX
• Sold Dec 2019£1,250,000 | 2 Bed FlatApartment 1, 21, Harrington Road, London, SW7 3EUApartment 1, 21, Harrington Road, London, SW7 3EU
• Sold May 2019£1,040,000 | 2 Bed FlatFlat 35, Thurloe Court, Fulham Road, London, SW3 6SBFlat 35, Thurloe Court, Fulham Road, London, SW3 6SB
• Sold Apr 2019£790,000 | 2 Bed FlatFlat 4, Thurloe Court, Fulham Road, London, SW3 6SBFlat 4, Thurloe Court, Fulham Road, London, SW3 6SB
• Sold Aug 2017£1,175,000 | 2 Bed FlatFlat 11, Thurloe Court, Fulham Road, London, SW3 6SBFlat 11, Thurloe Court, Fulham Road, London, SW3 6SB
• Sold Mar 2016£2,000,000 | 2 Bed FlatFlat 37, Malvern Court, Onslow Square, London, SW7 3HYFlat 37, Malvern Court, Onslow Square, London, SW7 3HY
• Sold Jan 2016£1,825,000 | 2 Bed Flat4C , Thurloe Street, London, SW7 2ST4C , Thurloe Street, London, SW7 2ST
• Sold Mar 2015£1,400,000 | 2 Bed FlatFlat 7, 27, Onslow Square, London, SW7 3NHFlat 7, 27, Onslow Square, London, SW7 3NH
• Sold Sep 2014£1,495,000 | 2 Bed FlatFlat 16, Thurloe Court, Fulham Road, London, SW3 6SBFlat 16, Thurloe Court, Fulham Road, London, SW3 6SB
• Sold Oct 2012£820,000 | 2 Bed FlatFlat 12, Petersham House 29-37, Harrington Road, London, SW7 3HDFlat 12, Petersham House 29-37, Harrington Road, London, SW7 3HD
• Sold Jan 2012£1,751,000 | 2 Bed FlatFlat 17, 27, Onslow Square, London, SW7 3NHFlat 17, 27, Onslow Square, London, SW7 3NH
• Sold Jun 2007£930,000 | 2 Bed FlatFlat 19, 27, Onslow Square, London, SW7 3NHFlat 19, 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 20, 27, Onslow Square is the 253rd largest and the 286th most expensive property on the street.

When compared to the postcode district it is £950k 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.