Flat 1, 8, Belsize Square has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 24 May 2019.

The property is connected to mains gas and has some double glazing. It is heated using a boiler and radiators (mains gas).

Flat 1, 8, Belsize Square last changed hands on 30th July 1999, selling for £560,000. The transaction was logged as a leasehold flat by HM Land Registry.

That is its only recorded sale since 1995.

• Sold Jul 1999£560,000

Land Registry records and our Estate Agent network show 17 sales of comparable properties within 270 metres of Flat 1, 8, Belsize Square since 2009.

Most recently, Flat 26, Eton Court, Eton Avenue, London, NW3 3HJ, a leasehold flat, sold at £2,200,000 on the 27th February 2026.

Read more about house prices in NW3.

• Sold Feb 2026£2,200,000 | 4 Bed FlatFlat 26, Eton Court, Eton Avenue, London, NW3 3HJFlat 26, Eton Court, Eton Avenue, London, NW3 3HJ
• Sold Oct 2024£2,750,000 | 4 Bed FlatFlat D, 45, Belsize Park, London, NW3 4EEFlat D, 45, Belsize Park, London, NW3 4EE
• Sold Sep 2024£2,200,000 | 4 Bed FlatFlat 27, Eton Court, Eton Avenue, London, NW3 3HJFlat 27, Eton Court, Eton Avenue, London, NW3 3HJ
• Sold Feb 2024£2,000,000 | 4 Bed FlatFlat 42, Eton Court, Eton Avenue, London, NW3 3HJFlat 42, Eton Court, Eton Avenue, London, NW3 3HJ
• Sold Nov 2022£2,635,000 | 4 Bed Flat6, Crossfield Road, London, NW3 4NS6, Crossfield Road, London, NW3 4NS
• Sold Aug 2022£2,625,000 | 4 Bed FlatFlat 2, 43, Lancaster Grove, London, NW3 4HBFlat 2, 43, Lancaster Grove, London, NW3 4HB
• Sold Jun 2022£2,450,000 | 4 Bed Flat6B , Belsize Park Gardens, London, NW3 4LD6B , Belsize Park Gardens, London, NW3 4LD
• Sold Apr 2021£2,420,000 | 4 Bed FlatFlat 39, Eton Court, Eton Avenue, London, NW3 3HJFlat 39, Eton Court, Eton Avenue, London, NW3 3HJ
• Sold Mar 2019£1,710,000 | 4 Bed Flat19E , Belsize Park, London, NW3 4DU19E , Belsize Park, London, NW3 4DU
• Sold Apr 2017£1,900,000 | 4 Bed FlatFlat D, 31, Lancaster Grove, London, NW3 4EXFlat D, 31, Lancaster Grove, London, NW3 4EX
• Sold Sep 2016£2,140,000 | 4 Bed FlatFlat 4, 4, Belsize Park, London, NW3 4ETFlat 4, 4, Belsize Park, London, NW3 4ET
• Sold Oct 2014£1,925,000 | 4 Bed FlatFlat 34, Eton Court, Eton Avenue, London, NW3 3HJFlat 34, Eton Court, Eton Avenue, London, NW3 3HJ
• Sold Aug 2014£2,200,000 | 4 Bed FlatFlat 35, Eton Court, Eton Avenue, London, NW3 3HJFlat 35, Eton Court, Eton Avenue, London, NW3 3HJ
• Sold Feb 2014£1,620,000 | 4 Bed FlatFlat 32, Eton Court, Eton Avenue, London, NW3 3HJFlat 32, Eton Court, Eton Avenue, London, NW3 3HJ
• Sold May 2012£1,300,000 | 4 Bed FlatFlat 17, Eton Court, Eton Avenue, London, NW3 3HJFlat 17, Eton Court, Eton Avenue, London, NW3 3HJ
• Sold Jan 2011£985,000 | 4 Bed FlatFlat 2, 27, Belsize Park, London, NW3 4DUFlat 2, 27, Belsize Park, London, NW3 4DU
• Sold Nov 2009£1,231,000 | 4 Bed FlatFlat 6, 35, Belsize Park Gardens, London, NW3 4JJFlat 6, 35, Belsize Park Gardens, London, NW3 4JJ

Agents in our network have reported 2 lettings within 270 metres of Flat 1, 8, 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
• 
  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.

Our analysis of the public data ranks Flat 1, 8, Belsize Square as the 6th largest and the 9th most expensive of the 264 addresses on Belsize Square, London, NW3.

Against the NW3 postcode district average, it is £916k more expensive than the typical property.

• 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

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