43A, Onslow Square has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 09 Sep 2021.

The property is connected to mains gas and has single glazed windows. It is heated using a boiler and radiators (mains gas).

Land Registry records and our Estate Agent network show 18 sales of comparable properties within 270 metres of 43A, Onslow Square since 2007.

Most recently, 13, Sydney Mews, London, SW3 6HL, a leasehold flat, sold at £1,500,000 on the 31st October 2025.

Read more about house prices in SW7.

• Sold Oct 2025£1,500,000 | 3 Bed Flat13, Sydney Mews, London, SW3 6HL13, Sydney Mews, London, SW3 6HL
• Sold Mar 2025£1,300,000 | 3 Bed FlatFlat 18, Melton Court, Onslow Crescent, London, SW7 3JQFlat 18, Melton Court, Onslow Crescent, London, SW7 3JQ
• Sold Oct 2024£1,600,000 | 3 Bed FlatFlat 9, Glendower Mansions , Glendower Place, London, SW7 3DSFlat 9, Glendower Mansions , Glendower Place, London, SW7 3DS
• Sold Dec 2022£875,000 | 3 Bed FlatFlat 18, 9-11 , Manson Place, London, SW7 5LTFlat 18, 9-11 , Manson Place, London, SW7 5LT
• Sold Feb 2022£1,605,000 | 3 Bed FlatFlat 1, 12, Sumner Place, London, SW7 3EEFlat 1, 12, Sumner Place, London, SW7 3EE
• Sold Dec 2021£2,185,000 | 3 Bed Flat45, Rose Square, London, SW3 6RS45, Rose Square, London, SW3 6RS
• Sold Jun 2021£1,800,000 | 2 Bed FlatFlat 7, 6, Onslow Square, London, SW7 3NPFlat 7, 6, Onslow Square, London, SW7 3NP
• Sold Aug 2019£1,550,000 | 3 Bed FlatFlat 9, 97, Onslow Square, London, SW7 3LUFlat 9, 97, Onslow Square, London, SW7 3LU
• Sold Sep 2017£632,000 | 3 Bed FlatFlat 1, 81, Onslow Square, London, SW7 3LTFlat 1, 81, Onslow Square, London, SW7 3LT
• Sold Jan 2017£1,300,000 | 3 Bed Flat97A, Onslow Square, London, SW7 3LU97A, Onslow Square, London, SW7 3LU
• Sold Aug 2015£1,550,000 | 3 Bed FlatFlat 7A, Avenue Studios, Sydney Close, London, SW3 6HWFlat 7A, Avenue Studios, Sydney Close, London, SW3 6HW
• Sold Sep 2014£2,900,000 | 3 Bed Flat7, Rose Square, London, SW3 6RS7, Rose Square, London, SW3 6RS
• Sold Dec 2013£2,800,000 | 3 Bed FlatFlat 5, 97, Onslow Square, London, SW7 3LUFlat 5, 97, Onslow Square, London, SW7 3LU
• 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 2009£1,135,000 | 2 Bed FlatFlat 9, 24, Onslow Square, London, SW7 3NSFlat 9, 24, Onslow Square, London, SW7 3NS
• Sold Jun 2007£1,352,000 | 2 Bed FlatFlat 3, 11, Onslow Square, London, SW7 3NJFlat 3, 11, Onslow Square, London, SW7 3NJ
• Sold Jun 2007£1,400,000 | 3 Bed FlatFlat 10, 105, Onslow Square, London, SW7 3LUFlat 10, 105, Onslow Square, London, SW7 3LU
• Sold Mar 2007£1,685,000 | 3 Bed FlatFlat 5, 89, Onslow Square, London, SW7 3LTFlat 5, 89, Onslow Square, London, SW7 3LT

Our analysis of the public data ranks 43A, Onslow Square as the 233rd largest and the 177th most expensive of the 321 addresses on Onslow Square, London, SW7.

Against the SW7 postcode district average, it is £319k less expensive than the typical property.

• 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

Environment Agency data suggests this area has a Very Low risk of flooding.