Flat 6, 9, Belsize Square has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 30 Sep 2022.

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

The most recent sale of Flat 6, 9, Belsize Square completed on 10th August 2015 at £800,000 and was recorded by HM Land Registry as a leasehold flat.

Since 1995 the property has sold 5 times.

Values of comparable properties have dropped by 17.9% over the period since August 2015.

• Sold Aug 2015£800,000
• Sold Dec 2013£1,620,000
• Sold Jul 2013£1,280,000

Since 2015 45 properties similar to Flat 6, 9, Belsize Square have sold within a radius of 270 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 20th June 2025, was 12B, Belsize Park Gardens, London, NW3 4LD, a leasehold flat which sold for £887,500.

Read more about house prices in NW3.

• Sold Jun 2025£887,500 | 2 Bed Flat12B, Belsize Park Gardens, London, NW3 4LD12B, Belsize Park Gardens, London, NW3 4LD
• Sold Mar 2025£855,000 | 2 Bed FlatFlat 1, 17, Adamson Road, London, NW3 3HUFlat 1, 17, Adamson Road, London, NW3 3HU
• Sold Feb 2025£1,135,000 | 2 Bed FlatFlat 3, 5, Belsize Avenue, London, NW3 4BLFlat 3, 5, Belsize Avenue, London, NW3 4BL
• Sold Sep 2024£910,500 | 2 Bed FlatFlat 2, 47, Belsize Square, London, NW3 4HNFlat 2, 47, Belsize Square, London, NW3 4HN
• Sold Jun 2024£775,000 | 2 Bed FlatFlat 2, 51, Belsize Park Gardens, London, NW3 4JLFlat 2, 51, Belsize Park Gardens, London, NW3 4JL
• Sold Mar 2024£1,085,000 | 2 Bed FlatFlat 4, 11, Belsize Avenue, London, NW3 4BLFlat 4, 11, Belsize Avenue, London, NW3 4BL
• Sold Oct 2023£780,000 | 2 Bed FlatFlat 2, 5A , Belsize Square, London, NW3 4HTFlat 2, 5A , Belsize Square, London, NW3 4HT
• Sold Jun 2023£935,000 | 2 Bed FlatFlat 9, 28, Belsize Park Gardens, London, NW3 4LHFlat 9, 28, Belsize Park Gardens, London, NW3 4LH
• Sold Aug 2022£1,240,000 | 2 Bed Flat1 Sussex House , Glenilla Road, London, NW3 4AR1 Sussex House , Glenilla Road, London, NW3 4AR
• Sold Jul 2022£1,076,150 | 2 Bed FlatFlat 5, 6, Strathray Gardens, London, NW3 4NYFlat 5, 6, Strathray Gardens, London, NW3 4NY
• Sold May 2022£1,000,000 | 2 Bed FlatFlat 5, 22, Belsize Square, London, NW3 4HTFlat 5, 22, Belsize Square, London, NW3 4HT
• Sold May 2022£865,000 | 2 Bed FlatFlat E, 10, Daleham Gardens, London, NW3 5DAFlat E, 10, Daleham Gardens, London, NW3 5DA
• Sold Jun 2021£790,000 | 2 Bed FlatFlat 3, 8, Belsize Park Gardens, London, NW3 4LDFlat 3, 8, Belsize Park Gardens, London, NW3 4LD
• Sold Mar 2021£1,360,000 | 2 Bed Flat1A, Belsize Park Gardens, London, NW3 4LB1A, Belsize Park Gardens, London, NW3 4LB
• Sold Aug 2020£698,000 | 2 Bed FlatFlat A, 11, Crossfield Road, London, NW3 4NSFlat A, 11, Crossfield Road, London, NW3 4NS
• Sold Jul 2020£801,000 | 2 Bed Flat4 Sussex House , Glenilla Road, London, NW3 4AR4 Sussex House , Glenilla Road, London, NW3 4AR
• Sold Nov 2019£1,250,000 | 2 Bed FlatFlat 3, 1, Belsize Park Gardens, London, NW3 4LBFlat 3, 1, Belsize Park Gardens, London, NW3 4LB
• Sold Jul 2017£1,250,000 | 2 Bed Flat15C , Buckland Crescent, London, NW3 5DH15C , Buckland Crescent, London, NW3 5DH
• Sold Oct 2015£734,000 | 2 Bed FlatFlat 3, 42, Belsize Square, London, NW3 4HNFlat 3, 42, Belsize Square, London, NW3 4HN
• Sold Jul 2015£792,000 | 2 Bed FlatFlat 3, 17, Adamson Road, London, NW3 3HUFlat 3, 17, Adamson Road, London, NW3 3HU

Over the past 2 years our Estate Agent network has recorded 1 let of a property comparable to Flat 6, 9, Belsize Square, all within 270 metres.

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

•Nearby is defined as the radius comprising the nearest 2,000 addresses.

Of the 264 addresses on Belsize Square, London, NW3, Flat 6, 9, Belsize Square comes out as the 144th largest and the 114th most expensive in our analysis of the public data.

It is also £324k 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.