Flat 5, 14, Onslow Square has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 27 Aug 2010.

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

According to the Land Registry and our network of Estate Agents, there have been 25 sales of properties similar to Flat 5, 14, Onslow Square within a radius of 270 metres since 2007.

The most recent example is Flat 8, 20, Onslow Square, London, SW7 3NP, a leasehold flat which sold for £2,280,000 on the 23rd December 2025.

Read more about house prices in SW7.

• Sold Dec 2025£2,280,000 | 3 Bed FlatFlat 8, 20, Onslow Square, London, SW7 3NPFlat 8, 20, Onslow Square, London, SW7 3NP
• Sold Jun 2025£2,200,000 | 3 Bed FlatFlat 9, 14, Onslow Square, London, SW7 3NPFlat 9, 14, Onslow Square, London, SW7 3NP
• Sold Sep 2024£1,275,000 | 3 Bed FlatBasement, 109A, Onslow Square, London, SW7 3LUBasement, 109A, Onslow Square, London, SW7 3LU
• Sold Jul 2024£1,975,000 | 3 Bed FlatFlat 10, 14, Onslow Square, London, SW7 3NPFlat 10, 14, Onslow Square, London, SW7 3NP
• Sold Oct 2023£2,600,000 | 3 Bed FlatFlat 6, 89, Onslow Square, London, SW7 3LTFlat 6, 89, Onslow Square, London, SW7 3LT
• Sold Sep 2017£632,000 | 3 Bed FlatFlat 1, 81, Onslow Square, London, SW7 3LTFlat 1, 81, Onslow Square, London, SW7 3LT
• Sold Mar 2017£2,500,000 | 3 Bed FlatFlat 2, 89, Onslow Square, London, SW7 3LTFlat 2, 89, Onslow Square, London, SW7 3LT
• Sold Jan 2017£3,000,000 | 3 Bed Flat63, Onslow Square, London, SW7 3LS63, Onslow Square, London, SW7 3LS
• Sold Jul 2016£3,600,000 | 3 Bed FlatFlat 8, 14, Onslow Square, London, SW7 3NPFlat 8, 14, Onslow Square, London, SW7 3NP
• Sold Feb 2016£2,550,000 | 3 Bed FlatFlat 1, 46, Onslow Square, London, SW7 3NXFlat 1, 46, Onslow Square, London, SW7 3NX
• Sold Dec 2015£2,850,000 | 3 Bed FlatFlat 4, 5, Onslow Square, London, SW7 3NJFlat 4, 5, Onslow Square, London, SW7 3NJ
• Sold Nov 2015£3,200,000 | 3 Bed FlatFlat 6, 14, Onslow Square, London, SW7 3NPFlat 6, 14, Onslow Square, London, SW7 3NP
• Sold Jul 2014£1,999,000 | 3 Bed FlatFlat 4, 14, Onslow Square, London, SW7 3NPFlat 4, 14, Onslow Square, London, SW7 3NP
• Sold Oct 2013£2,950,000 | 3 Bed FlatFlat 4, 6, Onslow Square, London, SW7 3NPFlat 4, 6, Onslow Square, London, SW7 3NP
• Sold Mar 2013£1,850,000 | 3 Bed FlatFlat 7, 89, Onslow Square, London, SW7 3LTFlat 7, 89, Onslow Square, London, SW7 3LT
• Sold Sep 2012£518,619 | 3 Bed FlatFlat 3, 5, Onslow Square, London, SW7 3NJFlat 3, 5, Onslow Square, London, SW7 3NJ
• Sold Jan 2011£2,250,000 | 3 Bed FlatFlat 3, 89, Onslow Square, London, SW7 3LTFlat 3, 89, Onslow Square, London, SW7 3LT
• Sold Feb 2010£1,030,000 | 3 Bed FlatFlat 6, 6, Onslow Square, London, SW7 3NPFlat 6, 6, Onslow Square, London, SW7 3NP
• Sold Nov 2008£2,400,000 | 3 Bed Flat50, Rose Square, London, SW3 6RS50, Rose Square, London, SW3 6RS
• Sold Mar 2007£1,685,000 | 3 Bed FlatFlat 5, 89, Onslow Square, London, SW7 3LTFlat 5, 89, Onslow Square, London, SW7 3LT

Onslow Square, London, SW7 has a total of 321 addresses. According to our analysis of all the public data, Flat 5, 14, Onslow Square is the 143rd largest and the 137th most expensive property on the street.

When compared to the postcode district it is £37k more expensive than the average property in SW7.

• Oratory Roman Catholic Primary School

  300 m away
• Our Lady of Victories RC Primary School

  500 m away
• Marlborough Primary School

  500 m away

• St. Thomas More Language College

  700 m away
• Chelsea Academy

  1.7 km away
• The London Oratory School

  1.8 km away

• South Kensington

  |

  200 m away
• Gloucester Road

  |

  700 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.