Basement Flat Left, 34, Eton Avenue has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 13 Aug 2021.

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

According to the Land Registry and our network of Estate Agents, there have been 21 sales of properties similar to Basement Flat Left, 34, Eton Avenue within a radius of 280 metres since 2011.

The most recent example is Flat 5, 32, Eton Avenue, London, NW3 3HL, a leasehold flat which sold for £1,695,000 on the 20th June 2025.

Read more about house prices in NW3.

• Sold Jun 2025£1,695,000 | 3 Bed FlatFlat 5, 32, Eton Avenue, London, NW3 3HLFlat 5, 32, Eton Avenue, London, NW3 3HL
• Sold Nov 2024£1,779,500 | 3 Bed Flat37C , Belsize Park Gardens, London, NW3 4JJ37C , Belsize Park Gardens, London, NW3 4JJ
• Sold May 2024£1,525,000 | 3 Bed FlatFlat 4, 36, Eton Avenue, London, NW3 3HLFlat 4, 36, Eton Avenue, London, NW3 3HL
• Sold Mar 2023£1,680,000 | 3 Bed Flat65B , Belsize Park Gardens, London, NW3 4JN65B , Belsize Park Gardens, London, NW3 4JN
• Sold Sep 2022£1,706,000 | 3 Bed FlatFlat 2, 35, Eton Avenue, London, NW3 3EPFlat 2, 35, Eton Avenue, London, NW3 3EP
• Sold Jun 2022£1,440,000 | 4 Bed FlatFlat 9, Belsize Park Firehouse 36, Lancaster Grove, London, NW3 4PBFlat 9, Belsize Park Firehouse 36, Lancaster Grove, London, NW3 4PB
• Sold Feb 2022£1,625,000 | 3 Bed Flat15A, Belsize Square, London, NW3 4HT15A, Belsize Square, London, NW3 4HT
• Sold Mar 2021£2,025,000 | 3 Bed FlatFlat 2, 28, Eton Avenue, London, NW3 3HLFlat 2, 28, Eton Avenue, London, NW3 3HL
• Sold Sep 2020£60,000 | 3 Bed FlatFlat 5, Belsize Park Firehouse 36, Lancaster Grove, London, NW3 4PBFlat 5, Belsize Park Firehouse 36, Lancaster Grove, London, NW3 4PB
• Sold Aug 2020£1,585,000 | 3 Bed Flat14A, Belsize Square, London, NW3 4HT14A, Belsize Square, London, NW3 4HT
• Sold Dec 2019£1,490,000 | 3 Bed Flat18A, Belsize Square, London, NW3 4HT18A, Belsize Square, London, NW3 4HT
• Sold Jan 2018£1,250,000 | 3 Bed FlatFlat 6, 14, Eton Avenue, London, NW3 3EHFlat 6, 14, Eton Avenue, London, NW3 3EH
• Sold Mar 2016£1,835,500 | 4 Bed Flat12C , Belsize Square, London, NW3 4HT12C , Belsize Square, London, NW3 4HT
• Sold Jan 2015£1,960,000 | 4 Bed FlatFlat 3, 18, Belsize Square, London, NW3 4HTFlat 3, 18, Belsize Square, London, NW3 4HT
• Sold Sep 2014£1,560,000 | 3 Bed FlatFlat 1, 22, Belsize Square, London, NW3 4HTFlat 1, 22, Belsize Square, London, NW3 4HT
• Sold Mar 2014£1,740,000 | 3 Bed FlatFlat 2, 14, Eton Avenue, London, NW3 3EHFlat 2, 14, Eton Avenue, London, NW3 3EH
• Sold Apr 2013£1,160,000 | 3 Bed FlatFlat D, 59, Eton Avenue, London, NW3 3ETFlat D, 59, Eton Avenue, London, NW3 3ET
• Sold Dec 2012£1,780,000 | 4 Bed FlatFlat 41, Eton Court, Eton Avenue, London, NW3 3HJFlat 41, Eton Court, Eton Avenue, London, NW3 3HJ
• Sold Sep 2011£725,000 | 4 Bed FlatFlat F, 71, Belsize Park Gardens, London, NW3 4JPFlat F, 71, Belsize Park Gardens, London, NW3 4JP
• Sold Jun 2011£1,000,000 | 3 Bed Flat17A, Belsize Square, London, NW3 4HT17A, Belsize Square, London, NW3 4HT

Our network of Estate Agents reports 1 let of a property similar to Basement Flat Left, 34, Eton Avenue within a radius of 280 metres over the last 2 years.

Most recently, 12B, Eton Avenue, London, NW3 3EH, a leasehold flat, was let by Fine Living in August 2025.

• 
  Let agreed Aug 2025£ Undisclosed | 2 Bed Flat12B, Eton Avenue, London, NW3 3EH12B, Eton Avenue, London, NW3 3EH

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

Eton Avenue, London, NW3 has a total of 345 addresses. According to our analysis of all the public data, Basement Flat Left, 34, Eton Avenue is the 103rd largest and the 84th most expensive property on the street.

When compared to the postcode district it is £318k more expensive than the average property in NW3.

• St Paul's Church of England Primary School

  500 m away
• Holy Trinity CofE Primary School, NW3

  700 m away
• Rosary Catholic Primary School

  800 m away

• The UCL Academy

  500 m away
• Harris Academy St John's Wood

  1.0 km away
• Haverstock School

  1.0 km away

• Swiss Cottage

  |

  500 m away
• Belsize Park

  |

  700 m away
• Finchley Road

  |

  800 m away

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