Flat 2, 42, Belsize Square has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 21 Jan 2015.

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

Flat 2, 42, Belsize Square last changed hands on 1st May 2015, selling for £2,150,000. 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 7.9% since May 2015.

• Sold May 2015£2,150,000

Land Registry records and our Estate Agent network show 9 sales of comparable properties within 260 metres of Flat 2, 42, Belsize Square since 2009.

Most recently, 37A, Belsize Park Gardens, London, NW3 4JJ, a leasehold flat, sold at £2,180,000 on the 5th September 2025.

Read more about house prices in NW3.

• Sold Sep 2025£2,180,000 | 4 Bed Flat37A, Belsize Park Gardens, London, NW3 4JJ37A, Belsize Park Gardens, London, NW3 4JJ
• Sold Dec 2024£94,000 | 4 Bed Flat7A, Belsize Park Gardens, London, NW3 4LB7A, Belsize Park Gardens, London, NW3 4LB
• Sold Aug 2022£2,625,000 | 4 Bed FlatFlat 2, 43, Lancaster Grove, London, NW3 4HBFlat 2, 43, Lancaster Grove, London, NW3 4HB
• Sold May 2019£95,000 | 4 Bed FlatApartment 10, 21, Belsize Lane, London, NW3 5ASApartment 10, 21, Belsize Lane, London, NW3 5AS
• 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 2011£1,800,000 | 4 Bed FlatFlat A, 31, Lancaster Grove, London, NW3 4EXFlat A, 31, Lancaster Grove, London, NW3 4EX
• Sold Apr 2010£1,150,000 | 4 Bed FlatFlat 1, 35, Belsize Park Gardens, London, NW3 4JJFlat 1, 35, Belsize Park Gardens, London, NW3 4JJ
• 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
• Sold Sep 2009£1,400,000 | 4 Bed Flat3A , Strathray Gardens, London, NW3 4PA3A , Strathray Gardens, London, NW3 4PA

Agents in our network have reported 2 lettings within 260 metres of Flat 2, 42, 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 2, 42, Belsize Square as the 14th largest and the 10th most expensive of the 264 addresses on Belsize Square, London, NW3.

Against the NW3 postcode district average, it is £907k more expensive than the typical property.

• Rosary Catholic Primary School

  500 m away
• Holy Trinity CofE Primary School, NW3

  600 m away
• Fitzjohn's Primary School

  700 m away

• The UCL Academy

  700 m away
• Harris Academy St John's Wood

  1.2 km away
• Haverstock School

  1.2 km away

• Belsize Park

  |

  500 m away
• Swiss Cottage

  |

  600 m away
• Finchley Road

  |

  700 m away

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