23, Walnut Avenue, Southampton occupies a 258 m² plot as recorded by HM Land Registry.

Of the 26 other houses in this postcode, 24 have recorded plot sizes, and this one ranks as the 9th largest.

23, Walnut Avenue, Southampton has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 08 Mar 2026.

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

Land Registry records and our Estate Agent network show 66 sales of comparable properties within 870 metres of 23, Walnut Avenue, Southampton since 2007.

Most recently, 33, Robert Cecil Avenue, Southampton, SO18 2NB, a freehold house, sold at £290,000 on the 28th January 2026.

Read more about house prices in SO18.

• Sold Jan 2026£290,000 | 3 Bed House33, Robert Cecil Avenue, Southampton, SO18 2NB33, Robert Cecil Avenue, Southampton, SO18 2NB
• Sold Sep 2025£300,000 | 3 Bed House15C, Willis Road, Southampton, SO16 2NS15C, Willis Road, Southampton, SO16 2NS
• Sold Mar 2025£315,000 | 3 Bed House6, Pilgrim Place, Southampton, SO18 2LG6, Pilgrim Place, Southampton, SO18 2LG
• Sold Mar 2025£294,125 | 3 Bed House4, Friars Way, Southampton, SO18 2JU4, Friars Way, Southampton, SO18 2JU
• Sold Mar 2025£290,000 | 3 Bed House91, Walnut Avenue, Southampton, SO18 2QU91, Walnut Avenue, Southampton, SO18 2QU
• Sold Sep 2024£275,000 | 3 Bed House49, Monks Way, Southampton, SO18 2LR49, Monks Way, Southampton, SO18 2LR
• Sold Nov 2023£299,995 | 3 Bed House10, Moat Hill, Southampton, SO18 2DS10, Moat Hill, Southampton, SO18 2DS
• Sold Dec 2022£292,000 | 3 Bed House40, Robert Cecil Avenue, Southampton, SO18 2NA40, Robert Cecil Avenue, Southampton, SO18 2NA
• Sold Sep 2022£245,000 | 3 Bed House119, Walnut Avenue, Southampton, SO18 2QU119, Walnut Avenue, Southampton, SO18 2QU
• Sold Sep 2021£245,000 | 3 Bed House17, Octavia Road, Southampton, SO18 2ND17, Octavia Road, Southampton, SO18 2ND
• Sold Aug 2021£240,000 | 3 Bed House97, Walnut Avenue, Southampton, SO18 2QU97, Walnut Avenue, Southampton, SO18 2QU
• Sold Mar 2021£230,000 | 3 Bed House100, Walnut Avenue, Southampton, SO18 2QU100, Walnut Avenue, Southampton, SO18 2QU
• Sold Nov 2016£240,000 | 3 Bed House22, Wide Lane, Southampton, SO18 2HH22, Wide Lane, Southampton, SO18 2HH
• Sold Jul 2016£200,000 | 3 Bed House49, Robert Cecil Avenue, Southampton, SO18 2NB49, Robert Cecil Avenue, Southampton, SO18 2NB
• Sold Sep 2015£182,000 | 3 Bed House105, Walnut Avenue, Southampton, SO18 2QU105, Walnut Avenue, Southampton, SO18 2QU
• Sold May 2015£140,000 | 3 Bed House114, Walnut Avenue, Southampton, SO18 2QU114, Walnut Avenue, Southampton, SO18 2QU
• Sold May 2011£146,000 | 3 Bed House103, Walnut Avenue, Southampton, SO18 2QU103, Walnut Avenue, Southampton, SO18 2QU
• Sold Jul 2009£147,950 | 3 Bed House29, Claudeen Close, Southampton, SO18 2HQ29, Claudeen Close, Southampton, SO18 2HQ
• Sold Nov 2007£171,000 | 3 Bed House104, Walnut Avenue, Southampton, SO18 2QU104, Walnut Avenue, Southampton, SO18 2QU
• Sold Jul 2007£167,000 | 4 Bed House55, Robert Cecil Avenue, Southampton, SO18 2NB55, Robert Cecil Avenue, Southampton, SO18 2NB

Our analysis of the public data ranks 23, Walnut Avenue, Southampton as the 13th largest and the 11th most expensive of the 123 addresses on Walnut Avenue, Southampton, SO18.

Against the SO18 postcode district average, it is £29k more expensive than the typical property.

• Mansbridge Primary School

  300 m away
• Stoneham Park Primary Academy

  1.5 km away
• Bitterne Park Primary & Nursery School - Part of the Learning Federation Partnership of Schools

  1.5 km away

• Saint George Catholic Voluntary Aided College Southampton

  1.0 km away
• Bitterne Park School

  1.4 km away
• Cantell School

  2.1 km away

• Swaythling

  |

  500 m away
• Southampton Airport Parkway

  |

  1.0 km away
• St Denys

  |

  2.6 km away

Environment Agency data suggests this area has a Very Low risk of flooding.