18C, Belsize Park last changed hands on 5th September 2008, selling for £1,160,000. 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 risen by 44.2% since September 2008.

• Sold Sep 2008£1,160,000
• Sold Nov 2005£770,000

Land Registry records and our Estate Agent network show 40 sales of comparable properties within 270 metres of 18C, Belsize Park since 2013.

Most recently, Flat 3, 29, Belsize Park Gardens, London, NW3 4JH, a leasehold flat, sold at £1,500,000 on the 3rd October 2025.

Read more about house prices in NW3.

• Sold Oct 2025£1,500,000 | 3 Bed FlatFlat 3, 29, Belsize Park Gardens, London, NW3 4JHFlat 3, 29, Belsize Park Gardens, London, NW3 4JH
• Sold Jan 2025£1,087,000 | 3 Bed Flat19D , Belsize Park, London, NW3 4DU19D , Belsize Park, London, NW3 4DU
• Sold Dec 2024£1,835,000 | 3 Bed FlatFlat 2, 3, Nutley Terrace, London, NW3 5BXFlat 2, 3, Nutley Terrace, London, NW3 5BX
• Sold Nov 2024£1,550,000 | 3 Bed Flat19C , Belsize Park, London, NW3 4DU19C , Belsize Park, London, NW3 4DU
• Sold Oct 2024£1,269,537 | 3 Bed Flat46A, Belsize Square, London, NW3 4HN46A, Belsize Square, London, NW3 4HN
• Sold Jun 2024£1,470,000 | 4 Bed FlatFlat 5, 14, Daleham Gardens, London, NW3 5DAFlat 5, 14, Daleham Gardens, London, NW3 5DA
• Sold May 2024£1,000,000 | 4 Bed FlatFlat 6, 23, Belsize Park, London, NW3 4DUFlat 6, 23, Belsize Park, London, NW3 4DU
• Sold Apr 2024£1,200,000 | 3 Bed FlatFlat 2, 31, Belsize Avenue, London, NW3 4BLFlat 2, 31, Belsize Avenue, London, NW3 4BL
• Sold Sep 2023£1,337,000 | 3 Bed FlatFlat 2, 29, Belsize Park Gardens, London, NW3 4JHFlat 2, 29, Belsize Park Gardens, London, NW3 4JH
• Sold Jul 2021£1,995,000 | 3 Bed FlatFlat 3, 3, Belsize Park, London, NW3 4ETFlat 3, 3, Belsize Park, London, NW3 4ET
• Sold Dec 2020£1,405,000 | 3 Bed Flat37D, Belsize Square, London, NW3 4HL37D, Belsize Square, London, NW3 4HL
• Sold Dec 2019£1,300,000 | 3 Bed FlatFlat 2, 27, Belsize Park Gardens, London, NW3 4JHFlat 2, 27, Belsize Park Gardens, London, NW3 4JH
• Sold Nov 2019£1,465,000 | 3 Bed Flat29A, Belsize Avenue, London, NW3 4BL29A, Belsize Avenue, London, NW3 4BL
• Sold Oct 2019£1,876,000 | 3 Bed FlatFlat 1, 13, Belsize Park Gardens, London, NW3 4JGFlat 1, 13, Belsize Park Gardens, London, NW3 4JG
• Sold Jul 2018£1,715,000 | 4 Bed Flat18A, Belsize Park, London, NW3 4DU18A, Belsize Park, London, NW3 4DU
• Sold Sep 2017£1,485,000 | 4 Bed FlatFlat 7, 25, Belsize Park, London, NW3 4DUFlat 7, 25, Belsize Park, London, NW3 4DU
• Sold Jun 2017£1,300,000 | 3 Bed Flat35A, Belsize Avenue, London, NW3 4BN35A, Belsize Avenue, London, NW3 4BN
• Sold Oct 2016£1,300,000 | 3 Bed Flat1 Avenue House, Belsize Park Gardens, London, NW3 4LA1 Avenue House, Belsize Park Gardens, London, NW3 4LA
• Sold Aug 2013£1,850,000 | 4 Bed FlatFlat 3, 26, Belsize Park, London, NW3 4DUFlat 3, 26, Belsize Park, London, NW3 4DU
• Sold Feb 2013£1,082,000 | 4 Bed FlatFlat 7, 29, Belsize Park, London, NW3 4DXFlat 7, 29, Belsize Park, London, NW3 4DX

Agents in our network have reported 2 lettings within 270 metres of 18C, Belsize Park 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 18C, Belsize Park as the 37th largest and the 84th most expensive of the 423 addresses on Belsize Park, London, NW3.

Against the NW3 postcode district average, it is £44k less expensive than the typical property.

• Holy Trinity CofE Primary School, NW3

  500 m away
• Rosary Catholic Primary School

  500 m away
• Fitzjohn's Primary School

  600 m away

• The UCL Academy

  800 m away
• Harris Academy St John's Wood

  1.2 km away
• Haverstock School

  1.3 km away

• Belsize Park

  |

  600 m away
• Finchley Road

  |

  600 m away
• Swiss Cottage

  |

  600 m away

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