43, Southdown Road, Harpenden occupies a 688 m² plot as recorded by HM Land Registry.

Of the 12 other houses in this postcode, 11 have recorded plot sizes, and this one ranks as the 7th largest.

43, Southdown Road, Harpenden has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 15 Jun 2023.

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

43, Southdown Road, Harpenden last changed hands on 4th October 2023, selling for £1,465,000. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold 3 times since 1995.

The market for similar properties has dropped by 9.6% since October 2023.

• Sold Oct 2023£1,465,000
• Sold Sep 2013£1,045,000
• Sold Apr 2009£870,000

Land Registry records and our Estate Agent network show 63 sales of comparable properties within 690 metres of 43, Southdown Road, Harpenden since 2016.

Most recently, 8, Spenser Road, Harpenden, AL5 5NN, a freehold house, sold at £1,675,000 on the 18th December 2025.

Read more about house prices in AL5.

• Sold Dec 2025£1,675,000 | 5 Bed House8, Spenser Road, Harpenden, AL5 5NN8, Spenser Road, Harpenden, AL5 5NN
• Sold Oct 2025£1,395,000 | 5 Bed House35, Crabtree Lane, Harpenden, AL5 5NT35, Crabtree Lane, Harpenden, AL5 5NT
• Sold Oct 2025£1,525,000 | 5 Bed House23, Meadow Walk, Harpenden, AL5 5TF23, Meadow Walk, Harpenden, AL5 5TF
• Sold Sep 2025£1,395,000 | 4 Bed House30, Crabtree Lane, Harpenden, AL5 5NS30, Crabtree Lane, Harpenden, AL5 5NS
• Sold Aug 2025£1,530,565 | 5 Bed House1B, Crabtree Lane, Harpenden, AL5 5TA1B, Crabtree Lane, Harpenden, AL5 5TA
• Sold Mar 2025£1,595,000 | 5 Bed House23, Topstreet Way, Harpenden, AL5 5TU23, Topstreet Way, Harpenden, AL5 5TU
• Sold Feb 2025£1,465,000 | 5 Bed House4, Spenser Road, Harpenden, AL5 5NN4, Spenser Road, Harpenden, AL5 5NN
• Sold Feb 2025£1,550,000 | 5 Bed House18, Spenser Road, Harpenden, AL5 5NN18, Spenser Road, Harpenden, AL5 5NN
• Sold Jan 2025£1,825,000 | 5 Bed House33, Southdown Road, Harpenden, AL5 1PF33, Southdown Road, Harpenden, AL5 1PF
• Sold Sep 2024£1,273,000 | 5 Bed House54, Southdown Road, Harpenden, AL5 1PQ54, Southdown Road, Harpenden, AL5 1PQ
• Sold Jan 2024£1,350,000 | 5 Bed House15, Spenser Road, Harpenden, AL5 5NW15, Spenser Road, Harpenden, AL5 5NW
• Sold Oct 2023£1,185,000 | 5 Bed House25, Crabtree Lane, Harpenden, AL5 5NT25, Crabtree Lane, Harpenden, AL5 5NT
• Sold Jun 2022£1,575,000 | 5 Bed House31, Topstreet Way, Harpenden, AL5 5TU31, Topstreet Way, Harpenden, AL5 5TU
• Sold Apr 2022£1,257,000 | 5 Bed House18, Fairmead Avenue, Harpenden, AL5 5UE18, Fairmead Avenue, Harpenden, AL5 5UE
• Sold Apr 2021£1,367,500 | 5 Bed House33, Topstreet Way, Harpenden, AL5 5TU33, Topstreet Way, Harpenden, AL5 5TU
• Sold Mar 2021£1,010,000 | 5 Bed House8, Gibbs Close, Harpenden, AL5 1FA8, Gibbs Close, Harpenden, AL5 1FA
• Sold Feb 2021£1,350,000 | 5 Bed House15, Gibbs Close, Harpenden, AL5 1FA15, Gibbs Close, Harpenden, AL5 1FA
• Sold Feb 2021£1,100,000 | 5 Bed House9, Gibbs Close, Harpenden, AL5 1FA9, Gibbs Close, Harpenden, AL5 1FA
• Sold Sep 2019£1,380,000 | 4 Bed House46, Southdown Road, Harpenden, AL5 1PG46, Southdown Road, Harpenden, AL5 1PG
• Sold Jan 2016£1,200,000 | 5 Bed House44, Southdown Road, Harpenden, AL5 1PG44, Southdown Road, Harpenden, AL5 1PG

Our analysis of the public data ranks 43, Southdown Road, Harpenden as the 15th largest and the 8th most expensive of the 119 addresses on Southdown Road, Harpenden, AL5.

Against the AL5 postcode district average, it is £557k more expensive than the typical property.

• St Dominic Catholic Primary School

  200 m away
• Harpenden Academy

  700 m away
• Crabtree Infants' School

  900 m away

• St George's School

  1.4 km away
• Sir John Lawes School

  1.4 km away
• Katherine Warington School

  1.9 km away

• Harpenden

  |

  500 m away
• St Albans City

  |

  6.8 km away
• St Albans Abbey

  |

  7.3 km away

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