According to data from HM Land Registry, 3, Prospect Lane, Harpenden sits on a plot of 748 m².

We have plot size data on 30 out of 30 other houses in the postcode and 3, Prospect Lane, Harpenden sits on the 29th largest plot.

3, Prospect Lane, Harpenden has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 19 Sep 2025.

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

According to HM Land Registry, 3, Prospect Lane, Harpenden was last sold on 29th July 2009 for £1,360,000 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since July 2009, the market for similar properties has risen by 51.3%.

• Sold Jul 2009£1,360,000

According to the Land Registry and our network of Estate Agents, there have been 20 sales of properties similar to 3, Prospect Lane, Harpenden within a radius of 2.0 kilometres since 2010.

The most recent example is Arlington House, Oakhurst Avenue, Harpenden, AL5 2ND, a freehold house which sold for £2,470,000 on the 3rd October 2024.

Read more about house prices in AL5.

• Sold Oct 2024£2,470,000 | 5 Bed HouseArlington House, Oakhurst Avenue, Harpenden, AL5 2NDArlington House, Oakhurst Avenue, Harpenden, AL5 2ND
• Sold Jan 2024£2,650,000 | 5 Bed House2, The Uplands, Harpenden, AL5 2PH2, The Uplands, Harpenden, AL5 2PH
• Sold Feb 2023£3,200,000 | 5 Bed House21, West Common Way, Harpenden, AL5 2LH21, West Common Way, Harpenden, AL5 2LH
• Sold Apr 2022£2,720,000 | 5 Bed House17, Grange Court Road, Harpenden, AL5 1BY17, Grange Court Road, Harpenden, AL5 1BY
• Sold Dec 2021£2,600,000 | 5 Bed House7, High Elms, Harpenden, AL5 2JU7, High Elms, Harpenden, AL5 2JU
• Sold Jun 2019£2,275,000 | 5 Bed House31, West Common Way, Harpenden, AL5 2LH31, West Common Way, Harpenden, AL5 2LH
• Sold Jul 2018£1,600,000 | 5 Bed House8, The Warren, Harpenden, AL5 2NH8, The Warren, Harpenden, AL5 2NH
• Sold Dec 2017£1,575,000 | 5 Bed House11, The Warren, Harpenden, AL5 2NH11, The Warren, Harpenden, AL5 2NH
• Sold Jul 2017£3,200,000 | 5 Bed House44, West Common Way, Harpenden, AL5 2LG44, West Common Way, Harpenden, AL5 2LG
• Sold Sep 2016£2,075,000 | 5 Bed House26, West Common Way, Harpenden, AL5 2LG26, West Common Way, Harpenden, AL5 2LG
• Sold Aug 2016£2,290,000 | 5 Bed House3, West Common Way, Harpenden, AL5 2LH3, West Common Way, Harpenden, AL5 2LH
• Sold Jul 2016£1,400,000 | 5 Bed House25, Grange Court Road, Harpenden, AL5 1BY25, Grange Court Road, Harpenden, AL5 1BY
• Sold Dec 2014£2,200,000 | 5 Bed House5, Cross Lane, Harpenden, AL5 1BX5, Cross Lane, Harpenden, AL5 1BX
• Sold Nov 2014£1,985,000 | 5 Bed House15, West Common Way, Harpenden, AL5 2LH15, West Common Way, Harpenden, AL5 2LH
• Sold Aug 2013£1,590,000 | 5 Bed House16, Dellcroft Way, Harpenden, AL5 2NG16, Dellcroft Way, Harpenden, AL5 2NG
• Sold Feb 2013£1,705,000 | 5 Bed HouseSion House, Oakhurst Avenue, Harpenden, AL5 2NDSion House, Oakhurst Avenue, Harpenden, AL5 2ND
• Sold Jan 2013£1,478,000 | 5 Bed House48, Oakfield Road, Harpenden, AL5 2NS48, Oakfield Road, Harpenden, AL5 2NS
• Sold Nov 2012£1,800,000 | 5 Bed House6, Dellcroft Way, Harpenden, AL5 2NG6, Dellcroft Way, Harpenden, AL5 2NG
• Sold Apr 2011£2,200,000 | 5 Bed House5, West Common Way, Harpenden, AL5 2LH5, West Common Way, Harpenden, AL5 2LH
• Sold Sep 2010£1,500,000 | 5 Bed HousePenden, Oakhurst Avenue, Harpenden, AL5 2NDPenden, Oakhurst Avenue, Harpenden, AL5 2ND

Our network of Estate Agents reports 2 lets within 2.0 kilometres of 3, Prospect Lane, Harpenden over the last 2 years.

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

• 
  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.

Prospect Lane, Harpenden, AL5 has a total of 30 addresses. According to our analysis of all the public data, 3, Prospect Lane, Harpenden is the 14th largest and the 8th most expensive property on the street.

When compared to the postcode district it is £1.894m more expensive than the average property in AL5.

• 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

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