16D, Belsize Square has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 17 May 2014.

The property is not connected to mains gas and has single glazed windows. It is heated using a boiler and radiators (mains gas).

The most recent sale of 16D, Belsize Square completed on 19th February 2021 at £515,000 and was recorded by HM Land Registry as a leasehold flat.

Since 1995 this is the property's only sale.

Values of comparable properties have dropped by 13.4% over the period since February 2021.

• Sold Feb 2021£515,000

Since 2013 38 properties similar to 16D, Belsize Square have sold within a radius of 270 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 5th December 2025, was Flat 2, 22, Belsize Avenue, London, NW3 4AU, a leasehold flat which sold for £545,000.

Read more about house prices in NW3.

• Sold Dec 2025£545,000 | 1 Bed FlatFlat 2, 22, Belsize Avenue, London, NW3 4AUFlat 2, 22, Belsize Avenue, London, NW3 4AU
• Sold Sep 2023£617,500 | 1 Bed FlatFlat D, 10, Belsize Square, London, NW3 4HTFlat D, 10, Belsize Square, London, NW3 4HT
• Sold Jul 2023£525,000 | 1 Bed FlatFlat 5, 5, Belsize Avenue, London, NW3 4BLFlat 5, 5, Belsize Avenue, London, NW3 4BL
• Sold Mar 2023£650,000 | 2 Bed FlatFlat 2, 5, Lambolle Road, London, NW3 4HSFlat 2, 5, Lambolle Road, London, NW3 4HS
• Sold Nov 2022£530,000 | 1 Bed FlatFlat 4, 26, Belsize Avenue, London, NW3 4AUFlat 4, 26, Belsize Avenue, London, NW3 4AU
• Sold Sep 2022£615,000 | 1 Bed FlatFlat 3, Claridge House 13, Belsize Park, London, NW3 4ESFlat 3, Claridge House 13, Belsize Park, London, NW3 4ES
• Sold Jun 2022£640,000 | 2 Bed FlatFlat 3, 2, Crossfield Road, London, NW3 4NSFlat 3, 2, Crossfield Road, London, NW3 4NS
• Sold Apr 2022£302,000 | 1 Bed FlatFlat 5, 28, Eton Avenue, London, NW3 3HLFlat 5, 28, Eton Avenue, London, NW3 3HL
• Sold Mar 2022£615,000 | 2 Bed FlatFlat 23, 7, Lambolle Road, London, NW3 4HSFlat 23, 7, Lambolle Road, London, NW3 4HS
• Sold Mar 2022£519,000 | 1 Bed Flat4E , Belsize Square, London, NW3 4HT4E , Belsize Square, London, NW3 4HT
• Sold Oct 2021£620,000 | 1 Bed Flat49A, Belsize Park Gardens, London, NW3 4JL49A, Belsize Park Gardens, London, NW3 4JL
• Sold Jun 2021£531,000 | 1 Bed FlatFlat 6, 26, Belsize Avenue, London, NW3 4AUFlat 6, 26, Belsize Avenue, London, NW3 4AU
• Sold Jun 2021£535,000 | 1 Bed FlatFlat 7, 5, Belsize Avenue, London, NW3 4BLFlat 7, 5, Belsize Avenue, London, NW3 4BL
• Sold Jan 2021£525,000 | 1 Bed Flat41D, Belsize Square, London, NW3 4HN41D, Belsize Square, London, NW3 4HN
• Sold Jan 2021£560,000 | 1 Bed FlatFlat 7, 31, Adamson Road, London, NW3 3HTFlat 7, 31, Adamson Road, London, NW3 3HT
• Sold Dec 2019£490,000 | 1 Bed FlatFlat 6, 5, Belsize Avenue, London, NW3 4BLFlat 6, 5, Belsize Avenue, London, NW3 4BL
• Sold Apr 2018£585,000 | 1 Bed Flat32C, Lambolle Road, London, NW3 4HR32C, Lambolle Road, London, NW3 4HR
• Sold Aug 2017£680,000 | 2 Bed FlatFlat 4, 26, Belsize Park, London, NW3 4DUFlat 4, 26, Belsize Park, London, NW3 4DU
• Sold Mar 2016£602,500 | 1 Bed Flat16G , Belsize Square, London, NW3 4HT16G , Belsize Square, London, NW3 4HT
• Sold Jun 2013£360,000 | 1 Bed FlatFlat 4, 5, Belsize Avenue, London, NW3 4BLFlat 4, 5, Belsize Avenue, London, NW3 4BL

Over the past 2 years our Estate Agent network has recorded 2 lets within 270 metres of 16D, Belsize Square.

The latest, in February 2025, was 3B , Lancaster Drive, London, NW3 4EY, a leasehold flat let by Fine Living.

• 
  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.

Of the 264 addresses on Belsize Square, London, NW3, 16D, Belsize Square comes out as the 218th largest and the 232nd most expensive in our analysis of the public data.

It is also £791k less expensive than the average property across the NW3 district.

• 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

The flood risk here is rated Very Low, based on Environment Agency data.