HM Land Registry records the plot of land for 4, Prospect Lane, Harpenden as measuring 1,275 m².

That makes it the 16th largest plot in the postcode, where all 30 other houses have recorded plot data.

4, Prospect Lane, Harpenden has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 09 Oct 2015.

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

The most recent sale of 4, Prospect Lane, Harpenden completed on 3rd November 2016 at £1,587,500 and was recorded by HM Land Registry as a freehold house.

Since 1995 this is the property's only sale.

Values of comparable properties have dropped by 10.3% over the period since November 2016.

• Sold Nov 2016£1,587,500

Since 2013 90 properties similar to 4, Prospect Lane, Harpenden have sold within a radius of 2.0 kilometres, per the Land Registry and our network of Estate Agents.

The latest, on the 22nd September 2025, was 7, The Chowns, Harpenden, AL5 2BN, a freehold house which sold for £1,850,000.

Read more about house prices in AL5.

• Sold Sep 2025£1,850,000 | 5 Bed House7, The Chowns, Harpenden, AL5 2BN7, The Chowns, Harpenden, AL5 2BN
• Sold Sep 2025£1,750,000 | 5 Bed House6, Wheatfield Avenue, Harpenden, AL5 2NU6, Wheatfield Avenue, Harpenden, AL5 2NU
• Sold Jul 2025£1,850,000 | 5 Bed House36, The Uplands, Harpenden, AL5 2NZ36, The Uplands, Harpenden, AL5 2NZ
• Sold Jun 2025£1,750,000 | 5 Bed House6, The Chowns, Harpenden, AL5 2BN6, The Chowns, Harpenden, AL5 2BN
• Sold Mar 2025£1,637,500 | 5 Bed House3, The Chowns, Harpenden, AL5 2BN3, The Chowns, Harpenden, AL5 2BN
• Sold Jun 2024£1,465,000 | 5 Bed House15, Penny Croft, Harpenden, AL5 2PD15, Penny Croft, Harpenden, AL5 2PD
• Sold Apr 2023£1,595,000 | 5 Bed House14, Hawsley Road, Harpenden, AL5 2BL14, Hawsley Road, Harpenden, AL5 2BL
• Sold Aug 2022£1,906,125 | 5 Bed House8, Netherfield Road, Harpenden, AL5 2AG8, Netherfield Road, Harpenden, AL5 2AG
• Sold Jul 2022£1,952,000 | 5 Bed House29, Prospect Lane, Harpenden, AL5 2PL29, Prospect Lane, Harpenden, AL5 2PL
• Sold Jun 2022£1,550,000 | 5 Bed House10, Hawsley Road, Harpenden, AL5 2BL10, Hawsley Road, Harpenden, AL5 2BL
• Sold Jan 2022£1,700,000 | 5 Bed House5, Penny Croft, Harpenden, AL5 2PD5, Penny Croft, Harpenden, AL5 2PD
• Sold Nov 2020£1,625,000 | 5 Bed House30, Penny Croft, Harpenden, AL5 2PB30, Penny Croft, Harpenden, AL5 2PB
• Sold Sep 2019£1,500,000 | 5 Bed House2, Prospect Lane, Harpenden, AL5 2PL2, Prospect Lane, Harpenden, AL5 2PL
• Sold Aug 2019£1,375,000 | 5 Bed House11, Barlings Road, Harpenden, AL5 2AL11, Barlings Road, Harpenden, AL5 2AL
• Sold Jan 2019£1,175,000 | 5 Bed House18, Hammondswick, Harpenden, AL5 2NR18, Hammondswick, Harpenden, AL5 2NR
• Sold Aug 2018£1,295,000 | 5 Bed House9, Penny Croft, Harpenden, AL5 2PD9, Penny Croft, Harpenden, AL5 2PD
• Sold Apr 2018£1,445,000 | 5 Bed House23, Barlings Road, Harpenden, AL5 2AL23, Barlings Road, Harpenden, AL5 2AL
• Sold Mar 2018£1,575,000 | 5 Bed House14, Penny Croft, Harpenden, AL5 2PB14, Penny Croft, Harpenden, AL5 2PB
• Sold Jun 2013£1,240,000 | 5 Bed House20, Wheatfield Road, Harpenden, AL5 2NY20, Wheatfield Road, Harpenden, AL5 2NY
• Sold Jun 2013£1,130,000 | 5 Bed House11, Penny Croft, Harpenden, AL5 2PD11, Penny Croft, Harpenden, AL5 2PD

Over the past 2 years our Estate Agent network has recorded 2 lets within 2.0 kilometres of 4, Prospect Lane, Harpenden.

The latest, in April 2025, was 3, Childwick Green, St. Albans, AL3 6JJ, a freehold house let by Collinson Hall.

• 
  Let Apr 2025£ Undisclosed | 2 Bed House3, Childwick Green, St. Albans, AL3 6JJ3, Childwick Green, St. Albans, AL3 6JJ
• 
  Let Jul 2023£ Undisclosed | 2 Bed House1, Childwick Green, St. Albans, AL3 6JJ1, Childwick Green, St. Albans, AL3 6JJ

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

Of the 30 addresses on Prospect Lane, Harpenden, AL5, 4, Prospect Lane, Harpenden comes out as the 17th largest and the 18th most expensive in our analysis of the public data.

It is also £866k more expensive than the average property across the AL5 district.

• St Dominic Catholic Primary School

  2.3 km away
• The Grove Junior School

  2.5 km away
• The Grove Infant and Nursery School

  2.5 km away

• Townsend Church of England School

  2.5 km away
• Roundwood Park School

  3.1 km away
• St Albans Girls' School

  3.3 km away

• Harpenden

  |

  2.6 km away
• St Albans City

  |

  5.3 km away
• St Albans Abbey

  |

  5.5 km away

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