According to HM Land Registry, Flat 5, 9, Belsize Square was last sold on 11th October 2007 for £440,000 and was recorded as a leasehold flat.

The property has only had this single sale since 1995.

Since October 2007, the market for similar properties has risen by 26.6%.

• Sold Oct 2007£440,000

According to the Land Registry and our network of Estate Agents, there have been 53 sales of properties similar to Flat 5, 9, Belsize Square within a radius of 270 metres since 2015.

The most recent example is Flat 18, 7, Lambolle Road, London, NW3 4HS, a leasehold flat which sold for £750,000 on the 30th January 2026.

Read more about house prices in NW3.

• Sold Jan 2026£750,000 | 2 Bed FlatFlat 18, 7, Lambolle Road, London, NW3 4HSFlat 18, 7, Lambolle Road, London, NW3 4HS
• Sold Nov 2025£907,009 | 2 Bed Flat19A, Adamson Road, London, NW3 3HU19A, Adamson Road, London, NW3 3HU
• Sold Jul 2025£845,000 | 2 Bed Flat25G , Belsize Park Gardens, London, NW3 4JH25G , Belsize Park Gardens, London, NW3 4JH
• Sold Mar 2025£475,000 | 2 Bed FlatFlat 3, 28, Belsize Park Gardens, London, NW3 4LHFlat 3, 28, Belsize Park Gardens, London, NW3 4LH
• Sold Feb 2025£880,000 | 2 Bed Flat25D , Belsize Park Gardens, London, NW3 4JH25D , Belsize Park Gardens, London, NW3 4JH
• Sold Feb 2025£680,000 | 2 Bed Flat22A, Adamson Road, London, NW3 3HR22A, Adamson Road, London, NW3 3HR
• Sold Oct 2024£790,000 | 2 Bed FlatFlat 7, 5, Lambolle Road, London, NW3 4HSFlat 7, 5, Lambolle Road, London, NW3 4HS
• Sold Aug 2024£885,000 | 2 Bed Flat9B , Belsize Avenue, London, NW3 4BL9B , Belsize Avenue, London, NW3 4BL
• Sold Dec 2023£880,000 | 2 Bed FlatFlat 6, 33, Belsize Park, London, NW3 4DXFlat 6, 33, Belsize Park, London, NW3 4DX
• Sold Oct 2023£780,000 | 2 Bed FlatFlat 2, 5A , Belsize Square, London, NW3 4HTFlat 2, 5A , Belsize Square, London, NW3 4HT
• Sold Oct 2023£721,500 | 2 Bed FlatFlat 4, Claridge House 13, Belsize Park, London, NW3 4ESFlat 4, Claridge House 13, Belsize Park, London, NW3 4ES
• Sold Apr 2023£800,000 | 2 Bed FlatFlat 1, 11, Belsize Park, London, NW3 4ESFlat 1, 11, Belsize Park, London, NW3 4ES
• Sold Oct 2022£905,000 | 2 Bed FlatFlat 3, 33, Belsize Park, London, NW3 4DXFlat 3, 33, Belsize Park, London, NW3 4DX
• Sold May 2022£1,000,000 | 2 Bed FlatFlat 5, 22, Belsize Square, London, NW3 4HTFlat 5, 22, Belsize Square, London, NW3 4HT
• Sold Dec 2021£650,000 | 2 Bed FlatFlat 6, 39, Belsize Park, London, NW3 4EEFlat 6, 39, Belsize Park, London, NW3 4EE
• Sold Jun 2021£52,500 | 2 Bed Flat4, Lancaster Grove, London, NW3 4NX4, Lancaster Grove, London, NW3 4NX
• Sold Jun 2021£790,000 | 2 Bed FlatFlat 3, 8, Belsize Park Gardens, London, NW3 4LDFlat 3, 8, Belsize Park Gardens, London, NW3 4LD
• Sold Apr 2021£825,000 | 2 Bed FlatFlat 4, 1, Buckland Crescent, London, NW3 5DHFlat 4, 1, Buckland Crescent, London, NW3 5DH
• Sold Aug 2020£755,000 | 2 Bed FlatFlat 6, Claridge House 13, Belsize Park, London, NW3 4ESFlat 6, Claridge House 13, Belsize Park, London, NW3 4ES
• Sold Sep 2015£862,500 | 2 Bed FlatFlat 7, 28, Belsize Park Gardens, London, NW3 4LHFlat 7, 28, Belsize Park Gardens, London, NW3 4LH

Our network of Estate Agents reports 1 let of a property similar to Flat 5, 9, Belsize Square within a radius of 270 metres over the last 2 years.

Most recently, 3A , Lancaster Drive, London, NW3 4EY, a leasehold flat, was let by Fine Living in March 2024.

• 
  Let agreed Mar 2024£ Undisclosed | 1 Bed Flat3A , Lancaster Drive, London, NW3 4EY3A , Lancaster Drive, London, NW3 4EY

•Nearby is defined as the radius comprising the nearest 2,000 addresses.

Belsize Square, London, NW3 has a total of 264 addresses. According to our analysis of all the public data, Flat 5, 9, Belsize Square is the 163rd largest and the 131st most expensive property on the street.

When compared to the postcode district it is £458k less expensive than the average property in NW3.

• Holy Trinity CofE Primary School, NW3

  500 m away
• Rosary Catholic Primary School

  600 m away
• St Paul's Church of England Primary School

  800 m away

• The UCL Academy

  600 m away
• Harris Academy St John's Wood

  1.1 km away
• Haverstock School

  1.2 km away

• Swiss Cottage

  |

  500 m away
• Belsize Park

  |

  600 m away
• Finchley Road

  |

  600 m away

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