Flat 6, 23, Belsize Park has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 26 Feb 2021.

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

According to HM Land Registry, Flat 6, 23, Belsize Park was last sold on 2nd May 2024 for £1,000,000 and was recorded as a leasehold flat.

The property has had 2 sales since 1995.

Since May 2024, the market for similar properties has dropped by 12.4%.

• Sold May 2024£1,000,000
• Sold Jul 2005£415,000

According to the Land Registry and our network of Estate Agents, there have been 45 sales of properties similar to Flat 6, 23, Belsize Park within a radius of 280 metres since 2008.

The most recent example is Flat 3, 29, Belsize Park Gardens, London, NW3 4JH, a leasehold flat which sold for £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 Jul 2024£1,325,000 | 3 Bed FlatFlat 4, 3, Buckland Crescent, London, NW3 5DHFlat 4, 3, Buckland Crescent, London, NW3 5DH
• Sold Jun 2024£1,470,000 | 4 Bed FlatFlat 5, 14, Daleham Gardens, London, NW3 5DAFlat 5, 14, Daleham Gardens, London, NW3 5DA
• 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 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
• Sold Sep 2008£1,160,000 | 4 Bed Flat18C , Belsize Park, London, NW3 4DU18C , Belsize Park, London, NW3 4DU

Our network of Estate Agents reports 2 lets within 280 metres of Flat 6, 23, Belsize Park over the last 2 years.

Most recently, 3B , Lancaster Drive, London, NW3 4EY, a leasehold flat, was 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.

Belsize Park, London, NW3 has a total of 423 addresses. According to our analysis of all the public data, Flat 6, 23, Belsize Park is the 38th largest and the 86th most expensive property on the street.

When compared to the postcode district it is £47k less expensive than the average property in NW3.

• 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

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.