Flat 7, 20, Onslow Square has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 14 Apr 2026.

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

Since 2007 17 properties similar to Flat 7, 20, Onslow Square have sold within a radius of 280 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 25th November 2025, was 11, Rose Square, London, SW3 6RS, a leasehold flat which sold for £1,280,000.

Read more about house prices in SW7.

• Sold Nov 2025£1,280,000 | 2 Bed Flat11, Rose Square, London, SW3 6RS11, Rose Square, London, SW3 6RS
• Sold Dec 2023£800,000 | 2 Bed FlatFlat 1, 181, Fulham Road, London, SW3 6JNFlat 1, 181, Fulham Road, London, SW3 6JN
• Sold May 2023£2,800,000 | 2 Bed FlatFlat 3, 23, Onslow Square, London, SW7 3NJFlat 3, 23, Onslow Square, London, SW7 3NJ
• Sold Dec 2022£800,000 | 2 Bed FlatFlat 7, 161, Fulham Road, London, SW3 6SNFlat 7, 161, Fulham Road, London, SW3 6SN
• Sold Sep 2022£718,000 | 2 Bed Flat61A, Onslow Square, London, SW7 3LS61A, Onslow Square, London, SW7 3LS
• Sold Aug 2022£1,900,000 | 2 Bed Flat70, Rose Square, London, SW3 6RS70, Rose Square, London, SW3 6RS
• Sold Dec 2021£1,300,000 | 2 Bed FlatFlat 2, 23, Sumner Place, London, SW7 3EGFlat 2, 23, Sumner Place, London, SW7 3EG
• Sold Jun 2021£499,999 | 2 Bed FlatFlat 3, 161, Fulham Road, London, SW3 6SNFlat 3, 161, Fulham Road, London, SW3 6SN
• Sold Mar 2021£4,750,000 | 2 Bed FlatFlat 4, 46, Onslow Square, London, SW7 3NXFlat 4, 46, Onslow Square, London, SW7 3NX
• Sold Jan 2017£6,200,000 | 2 Bed FlatFlat 5, 20, Onslow Square, London, SW7 3NPFlat 5, 20, Onslow Square, London, SW7 3NP
• Sold Jan 2015£3,250,000 | 2 Bed Flat55A, Sydney Street, London, SW3 6PX55A, Sydney Street, London, SW3 6PX
• Sold Jul 2012£1,450,000 | 2 Bed FlatFlat 2, 19, Sumner Place, London, SW7 3EGFlat 2, 19, Sumner Place, London, SW7 3EG
• Sold Sep 2010£1,175,000 | 2 Bed Flat2, Rose Square, London, SW3 6RS2, Rose Square, London, SW3 6RS
• Sold Aug 2010£484,600 | 2 Bed Flat105A, Onslow Square, London, SW7 3LU105A, Onslow Square, London, SW7 3LU
• Sold Jun 2008£497,500 | 2 Bed FlatFlat 10, 161, Fulham Road, London, SW3 6SNFlat 10, 161, Fulham Road, London, SW3 6SN
• Sold Mar 2007£248,000 | 2 Bed Flat67A, Onslow Square, London, SW7 3LS67A, Onslow Square, London, SW7 3LS
• Sold Feb 2007£5,400,000 | 2 Bed Flat8, Rose Square, London, SW3 6RS8, Rose Square, London, SW3 6RS

Of the 321 addresses on Onslow Square, London, SW7, Flat 7, 20, Onslow Square comes out as the 287th largest and the 271st most expensive in our analysis of the public data.

It is also £829k less expensive than the average property across the SW7 district.

• 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

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