Flat D, 30, Belsize Square has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 13 Dec 2011.

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

The most recent sale of Flat D, 30, Belsize Square completed on 27th September 2012 at £865,000 and was recorded by HM Land Registry as a leasehold flat.

Since 1995 the property has sold 3 times.

Values of comparable properties have dropped by 1.6% over the period since September 2012.

• Sold Sep 2012£865,000
• Sold Mar 2006£430,000
• Sold Jun 2001£345,000

Since 2019 66 properties similar to Flat D, 30, Belsize Square have sold within a radius of 270 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 30th January 2026, was 27D, Belsize Square, London, NW3 4HU, a leasehold flat which sold for £862,500.

Read more about house prices in NW3.

• Sold Jan 2026£862,500 | 3 Bed Flat27D, Belsize Square, London, NW3 4HU27D, Belsize Square, London, NW3 4HU
• Sold Jul 2025£700,000 | 2 Bed FlatFlat 8, Jade House 12, Lancaster Grove, London, NW3 4NXFlat 8, Jade House 12, Lancaster Grove, London, NW3 4NX
• Sold Jun 2025£887,500 | 2 Bed Flat12B, Belsize Park Gardens, London, NW3 4LD12B, Belsize Park Gardens, London, NW3 4LD
• Sold Mar 2025£1,125,000 | 3 Bed FlatFlat 1, Jade House 12, Lancaster Grove, London, NW3 4NXFlat 1, Jade House 12, Lancaster Grove, London, NW3 4NX
• Sold Feb 2025£1,135,000 | 2 Bed FlatFlat 3, 5, Belsize Avenue, London, NW3 4BLFlat 3, 5, Belsize Avenue, London, NW3 4BL
• Sold Nov 2024£755,000 | 2 Bed FlatFlat 6, 24, Belsize Park, London, NW3 4DUFlat 6, 24, Belsize Park, London, NW3 4DU
• Sold Nov 2024£1,085,000 | 2 Bed Flat44B, Belsize Park Gardens, London, NW3 4LY44B, Belsize Park Gardens, London, NW3 4LY
• Sold Sep 2024£910,500 | 2 Bed FlatFlat 2, 47, Belsize Square, London, NW3 4HNFlat 2, 47, Belsize Square, London, NW3 4HN
• Sold Sep 2024£800,000 | 2 Bed Flat19B, Belsize Park, London, NW3 4DU19B, Belsize Park, London, NW3 4DU
• 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 May 2024£594,000 | 3 Bed Flat27C , Belsize Square, London, NW3 4HU27C , Belsize Square, London, NW3 4HU
• Sold Mar 2024£950,000 | 3 Bed FlatFlat 6, 6, Strathray Gardens, London, NW3 4NYFlat 6, 6, Strathray Gardens, London, NW3 4NY
• Sold Jul 2023£840,000 | 2 Bed FlatFlat 2, 50, Belsize Square, London, NW3 4HNFlat 2, 50, Belsize Square, London, NW3 4HN
• Sold Jul 2022£1,076,150 | 2 Bed FlatFlat 5, 6, Strathray Gardens, London, NW3 4NYFlat 5, 6, Strathray Gardens, London, NW3 4NY
• Sold Feb 2022£1,100,000 | 3 Bed FlatFlat 1, 3, Buckland Crescent, London, NW3 5DHFlat 1, 3, Buckland Crescent, London, NW3 5DH
• Sold Sep 2021£985,000 | 3 Bed FlatFlat 1, 23, Belsize Park, London, NW3 4DUFlat 1, 23, Belsize Park, London, NW3 4DU
• Sold Jun 2021£965,000 | 3 Bed FlatFlat 3, Jade House 12, Lancaster Grove, London, NW3 4NXFlat 3, Jade House 12, Lancaster Grove, London, NW3 4NX
• Sold Dec 2020£650,000 | 2 Bed FlatFlat E, 25, Lancaster Grove, London, NW3 4EXFlat E, 25, Lancaster Grove, London, NW3 4EX
• Sold Jan 2020£945,000 | 2 Bed FlatFlat 5, 26, Belsize Park, London, NW3 4DUFlat 5, 26, Belsize Park, London, NW3 4DU
• Sold May 2019£1,160,000 | 3 Bed FlatFlat 1, 47, Belsize Square, London, NW3 4HNFlat 1, 47, Belsize Square, London, NW3 4HN

Over the past 2 years our Estate Agent network has recorded 2 lets within 270 metres of Flat D, 30, 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, Flat D, 30, Belsize Square comes out as the 132nd largest and the 134th most expensive in our analysis of the public data.

It is also £465k less expensive than the average property across the NW3 district.

• Holy Trinity CofE Primary School, NW3

  600 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

• Belsize Park

  |

  500 m away
• Swiss Cottage

  |

  500 m away
• Finchley Road

  |

  700 m away

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