27B, Belsize Square has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 03 Oct 2018.

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

27B, Belsize Square last changed hands on 31st May 2024, selling for £675,000. The transaction was logged as a leasehold flat by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has dropped by 10.1% since May 2024.

• Sold May 2024£675,000

Land Registry records and our Estate Agent network show 45 sales of comparable properties within 260 metres of 27B, 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 Jan 2026£695,000 | 2 Bed FlatFlat D, 71, Belsize Park Gardens, London, NW3 4JPFlat D, 71, Belsize Park Gardens, London, NW3 4JP
• Sold Nov 2025£670,000 | 2 Bed FlatFlat 3, 29, Belsize Park, London, NW3 4DXFlat 3, 29, Belsize Park, London, NW3 4DX
• Sold Jul 2025£725,000 | 2 Bed Flat18E , Belsize Park, London, NW3 4DU18E , Belsize Park, London, NW3 4DU
• Sold Jan 2025£589,995 | 2 Bed FlatFlat 7, 6, Lancaster Drive, London, NW3 4HAFlat 7, 6, Lancaster Drive, London, NW3 4HA
• Sold Dec 2023£615,000 | 2 Bed FlatFlat 11, 27, Belsize Park, London, NW3 4DUFlat 11, 27, Belsize Park, London, NW3 4DU
• Sold Mar 2023£765,000 | 2 Bed FlatFlat 15, 7, Lambolle Road, London, NW3 4HSFlat 15, 7, Lambolle Road, London, NW3 4HS
• Sold Jan 2023£820,000 | 2 Bed FlatFlat B, 71, Belsize Park Gardens, London, NW3 4JPFlat B, 71, Belsize Park Gardens, London, NW3 4JP
• Sold Dec 2022£597,500 | 2 Bed FlatFlat 4, 2, Crossfield Road, London, NW3 4NSFlat 4, 2, Crossfield Road, London, NW3 4NS
• Sold Jul 2022£734,000 | 2 Bed FlatFlat 3, 14, Glenmore Road, London, NW3 4DBFlat 3, 14, Glenmore Road, London, NW3 4DB
• Sold Feb 2022£33,500 | 2 Bed FlatFlat 6, 59, Belsize Park Gardens, London, NW3 4JNFlat 6, 59, Belsize Park Gardens, London, NW3 4JN
• Sold Feb 2022£975,000 | 2 Bed FlatFlat B, 22, Lambolle Road, London, NW3 4HPFlat B, 22, Lambolle Road, London, NW3 4HP
• Sold Jun 2021£785,000 | 2 Bed Flat8B , Lancaster Grove, London, NW3 4NX8B , Lancaster Grove, London, NW3 4NX
• Sold Jun 2021£793,000 | 2 Bed Flat26A , Lambolle Road, London, NW3 4HR26A , Lambolle Road, London, NW3 4HR
• Sold Feb 2021£651,050 | 2 Bed FlatFlat 1, 19, Crossfield Road, London, NW3 4NTFlat 1, 19, Crossfield Road, London, NW3 4NT
• Sold Apr 2020£780,000 | 2 Bed FlatFlat 6, 38, Belsize Square, London, NW3 4HLFlat 6, 38, Belsize Square, London, NW3 4HL
• Sold Nov 2017£960,000 | 2 Bed FlatFlat 3, 24, Belsize Park, London, NW3 4DUFlat 3, 24, Belsize Park, London, NW3 4DU
• Sold Mar 2016£940,000 | 2 Bed Flat28B , Belsize Square, London, NW3 4HU28B , Belsize Square, London, NW3 4HU
• Sold Jun 2015£860,000 | 2 Bed FlatFlat 5, 24, Belsize Park, London, NW3 4DUFlat 5, 24, Belsize Park, London, NW3 4DU
• Sold Sep 2014£705,000 | 2 Bed FlatFlat 1, 27, Belsize Park, London, NW3 4DUFlat 1, 27, Belsize Park, London, NW3 4DU

Agents in our network have reported 1 letting of a comparable property within 260 metres of 27B, 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 27B, Belsize Square as the 148th largest and the 185th most expensive of the 264 addresses on Belsize Square, London, NW3.

Against the NW3 postcode district average, it is £674k 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.