27A, Belsize Square has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 22 Jun 2026.

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

27A, Belsize Square last changed hands on 4th May 2016, selling for £895,000. The transaction was logged as a leasehold flat by HM Land Registry.

In total it has sold twice since 1995.

The market for similar properties has dropped by 16.7% since May 2016.

• Sold May 2016£895,000
• Sold Jun 2010£620,000

Land Registry records and our Estate Agent network show 42 sales of comparable properties within 260 metres of 27A, Belsize Square since 2014.

Most recently, Flat 18, 7, Lambolle Road, London, NW3 4HS, a leasehold flat, sold at £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 Jul 2025£700,000 | 2 Bed FlatFlat 8, Jade House 12, Lancaster Grove, London, NW3 4NXFlat 8, Jade House 12, Lancaster Grove, London, NW3 4NX
• Sold Nov 2024£755,000 | 2 Bed FlatFlat 6, 24, Belsize Park, London, NW3 4DUFlat 6, 24, Belsize Park, London, NW3 4DU
• Sold Oct 2024£790,000 | 2 Bed FlatFlat 7, 5, Lambolle Road, London, NW3 4HSFlat 7, 5, Lambolle Road, London, NW3 4HS
• Sold Oct 2024£425,000 | 2 Bed Flat59A, Belsize Park Gardens, London, NW3 4JN59A, Belsize Park Gardens, London, NW3 4JN
• Sold Sep 2024£800,000 | 2 Bed Flat19B, Belsize Park, London, NW3 4DU19B, Belsize Park, London, NW3 4DU
• Sold Aug 2024£885,000 | 2 Bed Flat9B , Belsize Avenue, London, NW3 4BL9B , Belsize Avenue, London, NW3 4BL
• Sold May 2024£594,000 | 3 Bed Flat27C , Belsize Square, London, NW3 4HU27C , Belsize Square, London, NW3 4HU
• Sold May 2024£675,000 | 2 Bed Flat27B , Belsize Square, London, NW3 4HU27B , Belsize Square, London, NW3 4HU
• Sold May 2024£785,000 | 3 Bed Flat67E , Belsize Park Gardens, London, NW3 4JN67E , Belsize Park Gardens, London, NW3 4JN
• Sold Jul 2023£840,000 | 2 Bed FlatFlat 2, 50, Belsize Square, London, NW3 4HNFlat 2, 50, Belsize Square, London, NW3 4HN
• Sold Mar 2023£765,000 | 2 Bed FlatFlat 15, 7, Lambolle Road, London, NW3 4HSFlat 15, 7, Lambolle Road, London, NW3 4HS
• Sold Feb 2022£975,000 | 2 Bed FlatFlat B, 22, Lambolle Road, London, NW3 4HPFlat B, 22, Lambolle Road, London, NW3 4HP
• Sold Sep 2021£712,000 | 2 Bed FlatFlat 1, 22, Crossfield Road, London, NW3 4NTFlat 1, 22, Crossfield Road, London, NW3 4NT
• Sold Apr 2021£717,500 | 2 Bed FlatFlat 12, Jade House 12, Lancaster Grove, London, NW3 4NXFlat 12, Jade House 12, Lancaster Grove, London, NW3 4NX
• Sold Jan 2020£945,000 | 2 Bed FlatFlat 5, 26, Belsize Park, London, NW3 4DUFlat 5, 26, Belsize Park, London, NW3 4DU
• Sold Jun 2019£985,000 | 2 Bed FlatFlat B, 25, Lancaster Grove, London, NW3 4EXFlat B, 25, Lancaster Grove, London, NW3 4EX
• Sold Aug 2017£750,000 | 2 Bed FlatFlat 13, 7, Lambolle Road, London, NW3 4HSFlat 13, 7, Lambolle Road, London, NW3 4HS
• Sold Mar 2016£940,000 | 2 Bed Flat28B , Belsize Square, London, NW3 4HU28B , Belsize Square, London, NW3 4HU
• Sold Jun 2014£960,000 | 2 Bed Flat22A, Belsize Park, London, NW3 4DU22A, Belsize Park, London, NW3 4DU

Agents in our network have reported 1 letting of a comparable property within 260 metres of 27A, Belsize Square across the last 2 years.

The newest of these is 3B , Lancaster Drive, London, NW3 4EY, a leasehold flat let by Fine Living in February 2025.

• 
  Let agreed Feb 2025£ Undisclosed | 2 Bed Flat3B , Lancaster Drive, London, NW3 4EY3B , Lancaster Drive, London, NW3 4EY

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

Our analysis of the public data ranks 27A, Belsize Square as the 134th largest and the 158th most expensive of the 264 addresses on Belsize Square, London, NW3.

Against the NW3 postcode district average, it is £599k less expensive than the typical property.

• Holy Trinity CofE Primary School, NW3

  600 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

• Belsize Park

  |

  500 m away
• Swiss Cottage

  |

  500 m away
• Finchley Road

  |

  700 m away

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