Flat 3, 3, Belsize Avenue has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 25 May 2026.

The property is connected to mains gas and has single glazed windows. It is heated using a boiler and radiators (mains gas).

Since 2013 35 properties similar to Flat 3, 3, Belsize Avenue 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 Jun 2025£585,000 | 1 Bed Flat6, Mccrone Mews, London, NW3 5BG6, Mccrone Mews, London, NW3 5BG
• 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£470,000 | 1 Bed Flat60A, Belsize Avenue, London, NW3 4AA60A, Belsize Avenue, London, NW3 4AA
• 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 Mar 2022£519,000 | 1 Bed Flat4E , Belsize Square, London, NW3 4HT4E , Belsize Square, London, NW3 4HT
• 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 Apr 2021£525,000 | 1 Bed Flat17, Mccrone Mews, London, NW3 5BG17, Mccrone Mews, London, NW3 5BG
• Sold Feb 2021£515,000 | 1 Bed Flat16D , Belsize Square, London, NW3 4HT16D , Belsize Square, London, NW3 4HT
• Sold Jan 2021£525,000 | 1 Bed Flat41D, Belsize Square, London, NW3 4HN41D, Belsize Square, London, NW3 4HN
• Sold May 2020£550,000 | 1 Bed Flat18A, Tudor Close, London, NW3 4AB18A, Tudor Close, London, NW3 4AB
• Sold Dec 2019£490,000 | 1 Bed FlatFlat 6, 5, Belsize Avenue, London, NW3 4BLFlat 6, 5, Belsize Avenue, London, NW3 4BL
• Sold Apr 2019£640,000 | 1 Bed FlatFirst Floor Flat, 8, Belsize Crescent, London, NW3 5QUFirst Floor Flat, 8, Belsize Crescent, London, NW3 5QU
• Sold Nov 2018£400,000 | 1 Bed FlatFlat 2, 49, Belsize Avenue, London, NW3 4BNFlat 2, 49, Belsize Avenue, London, NW3 4BN
• Sold May 2018£550,000 | 1 Bed FlatFlat 12, 28, Belsize Avenue, London, NW3 4AUFlat 12, 28, Belsize Avenue, London, NW3 4AU
• Sold Mar 2014£525,000 | 1 Bed FlatFlat 1, 16, Belsize Avenue, London, NW3 4AUFlat 1, 16, Belsize Avenue, London, NW3 4AU
• 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 Flat 3, 3, Belsize Avenue.

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 446 addresses on Belsize Avenue, London, NW3, Flat 3, 3, Belsize Avenue comes out as the 366th largest and the 287th most expensive in our analysis of the public data.

It is also £794k less expensive than the average property across the NW3 district.

• Rosary Catholic Primary School

  400 m away
• Fitzjohn's Primary School

  600 m away
• Holy Trinity CofE Primary School, NW3

  600 m away

• The UCL Academy

  900 m away
• Haverstock School

  1.3 km away
• Harris Academy St John's Wood

  1.4 km away

• Belsize Park

  |

  400 m away
• Finchley Road

  |

  700 m away
• Hampstead Heath

  |

  700 m away

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