Flat 6, 51, Onslow Square has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 05 Feb 2013.

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

According to HM Land Registry, Flat 6, 51, Onslow Square was last sold on 25th November 2005 for £985,000 and was recorded as a leasehold flat.

The property has only had this single sale since 1995.

• Sold Nov 2005£985,000

According to the Land Registry and our network of Estate Agents, there have been 13 sales of properties similar to Flat 6, 51, Onslow Square within a radius of 270 metres since 2009.

The most recent example is Flat 10, 81, Onslow Square, London, SW7 3LT, a leasehold flat which sold for £2,500,000 on the 15th August 2025.

Read more about house prices in SW7.

• Sold Aug 2025£2,500,000 | 3 Bed FlatFlat 10, 81, Onslow Square, London, SW7 3LTFlat 10, 81, Onslow Square, London, SW7 3LT
• Sold Jul 2025£2,190,000 | 3 Bed FlatFlat 1, 23, Sumner Place, London, SW7 3EGFlat 1, 23, Sumner Place, London, SW7 3EG
• Sold Dec 2023£2,841,500 | 3 Bed Flat62, Rose Square, London, SW3 6RS62, Rose Square, London, SW3 6RS
• Sold Aug 2022£3,600,000 | 3 Bed FlatFlat 1, 17, Onslow Square, London, SW7 3NJFlat 1, 17, Onslow Square, London, SW7 3NJ
• Sold Dec 2020£4,950,000 | 3 Bed Flat47, Onslow Square, London, SW7 3LR47, Onslow Square, London, SW7 3LR
• Sold Oct 2018£2,650,000 | 3 Bed FlatFlat 2, 52, Onslow Square, London, SW7 3NXFlat 2, 52, Onslow Square, London, SW7 3NX
• Sold Jun 2018£3,000,000 | 3 Bed FlatFlat 1, 38, Onslow Square, London, SW7 3NSFlat 1, 38, Onslow Square, London, SW7 3NS
• Sold Jun 2016£4,140,000 | 3 Bed FlatFlat 2, 44, Onslow Square, London, SW7 3NXFlat 2, 44, Onslow Square, London, SW7 3NX
• Sold Mar 2016£4,400,000 | 3 Bed Flat19, Onslow Square, London, SW7 3NJ19, Onslow Square, London, SW7 3NJ
• Sold Sep 2015£3,850,000 | 3 Bed Flat20, Rose Square, London, SW3 6RS20, Rose Square, London, SW3 6RS
• Sold Feb 2015£3,100,000 | 3 Bed FlatFlat 4, 52, Onslow Square, London, SW7 3NXFlat 4, 52, Onslow Square, London, SW7 3NX
• Sold May 2014£3,900,000 | 3 Bed FlatFlat 3, 38, Onslow Square, London, SW7 3NSFlat 3, 38, Onslow Square, London, SW7 3NS
• Sold May 2009£2,300,000 | 3 Bed FlatFlat 4, 51, Onslow Square, London, SW7 3LRFlat 4, 51, Onslow Square, London, SW7 3LR

Onslow Square, London, SW7 has a total of 321 addresses. According to our analysis of all the public data, Flat 6, 51, Onslow Square is the 104th largest and the 51st most expensive property on the street.

When compared to the postcode district it is £1.135m more 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

  1.8 km away
• The London Oratory School

  1.9 km away

• South Kensington

  |

  100 m away
• Gloucester Road

  |

  600 m away
• Knightsbridge

  |

  1.1 km away

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