Flat 9, 31, Belsize Avenue has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 03 Mar 2026.

The property is connected to mains gas and has single glazed windows. It is heated using room heaters (electric).

According to the Land Registry and our network of Estate Agents, there have been 581 property sales within 270 metres of Flat 9, 31, Belsize Avenue since 2007.

The most recent example is Flat 7, 27, Belsize Avenue, London, NW3 4BL, a leasehold flat which sold for £700,000 on the 17th April 2026.

Read more about house prices in NW3.

• Sold Apr 2026£700,000 | 3 Bed FlatFlat 7, 27, Belsize Avenue, London, NW3 4BLFlat 7, 27, Belsize Avenue, London, NW3 4BL
• Sold May 2025£947,500 | 3 Bed Flat35G, Belsize Avenue, London, NW3 4BN35G, Belsize Avenue, London, NW3 4BN
• Sold Sep 2024£625,000 | 2 Bed FlatFlat 4, 27, Belsize Avenue, London, NW3 4BLFlat 4, 27, Belsize Avenue, London, NW3 4BL
• Sold Apr 2024£1,200,000 | 3 Bed FlatFlat 2, 31, Belsize Avenue, London, NW3 4BLFlat 2, 31, Belsize Avenue, London, NW3 4BL
• Sold Jan 2023£1,420,000 | 3 Bed Flat25C , Belsize Avenue, London, NW3 4BL25C , Belsize Avenue, London, NW3 4BL
• Sold Aug 2022£550,000 | 1 Bed FlatFlat 3, 27, Belsize Avenue, London, NW3 4BLFlat 3, 27, Belsize Avenue, London, NW3 4BL
• Sold Jun 2021£1,850,000 | 4 Bed FlatFlat 1, 31, Belsize Avenue, London, NW3 4BLFlat 1, 31, Belsize Avenue, London, NW3 4BL
• Sold Mar 2021£1,123,296 | 3 Bed FlatFlat B, 23, Belsize Avenue, London, NW3 4BLFlat B, 23, Belsize Avenue, London, NW3 4BL
• Sold Nov 2019£1,465,000 | 3 Bed Flat29A, Belsize Avenue, London, NW3 4BL29A, Belsize Avenue, London, NW3 4BL
• Sold Oct 2018£1,944,871 | 3 Bed House19, Belsize Lane, London, NW3 5AG19, Belsize Lane, London, NW3 5AG
• Sold Jul 2018£830,000 | 2 Bed Flat35C , Belsize Avenue, London, NW3 4BN35C , Belsize Avenue, London, NW3 4BN
• Sold Jan 2018£2,400,000 | 4 Bed House12, Village Close, London, NW3 5AH12, Village Close, London, NW3 5AH
• Sold Jun 2017£1,300,000 | 3 Bed Flat35A, Belsize Avenue, London, NW3 4BN35A, Belsize Avenue, London, NW3 4BN
• Sold Mar 2016£1,580,000 | 3 Bed House10, Village Close, London, NW3 5AH10, Village Close, London, NW3 5AH
• Sold Nov 2015£668,736 | 2 Bed Flat35F, Belsize Avenue, London, NW3 4BN35F, Belsize Avenue, London, NW3 4BN
• Sold May 2015£724,018 | 2 Bed Flat35E , Belsize Avenue, London, NW3 4BN35E , Belsize Avenue, London, NW3 4BN
• Sold May 2012£1,125,000 | 3 Bed Flat25B, Belsize Avenue, London, NW3 4BL25B, Belsize Avenue, London, NW3 4BL
• Sold Sep 2009£940,000 | 4 Bed Flat25A, Belsize Avenue, London, NW3 4BL25A, Belsize Avenue, London, NW3 4BL
• Sold Jul 2008£774,000 | 3 Bed Flat25D , Belsize Avenue, London, NW3 4BL25D , Belsize Avenue, London, NW3 4BL
• Sold Aug 2007£495,000 | 2 Bed Flat35D , Belsize Avenue, London, NW3 4BN35D , Belsize Avenue, London, NW3 4BN

Belsize Avenue, London, NW3 has a total of 446 addresses. According to our analysis of all the public data, Flat 9, 31, Belsize Avenue is the 432nd largest and the 435th most expensive property on the street.

When compared to the postcode district it is £1.09m less expensive than the average property in NW3.

• 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

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