According to data from HM Land Registry, 9, How Field, Harpenden sits on a plot of 421 m².

We have plot size data on 12 out of 12 other houses in the postcode and 9, How Field, Harpenden sits on the 9th largest plot.

9, How Field, Harpenden has an Energy Performance Rating (EPC) of B. This is based on the most recent assessment, dated 21 Feb 2019.

The property is not connected to mains gas and has high performance glazing. It is heated using a boiler and radiators (mains gas).

According to the Land Registry and our network of Estate Agents, there have been 161 sales of properties similar to 9, How Field, Harpenden within a radius of 830 metres since 2008.

The most recent example is 3, How Field, Harpenden, AL5 3AU, a freehold house which sold for £1,150,000 on the 17th December 2025.

Read more about house prices in AL5.

• Sold Dec 2025£1,150,000 | 4 Bed House3, How Field, Harpenden, AL5 3AU3, How Field, Harpenden, AL5 3AU
• Sold Dec 2025£835,000 | 4 Bed House13, Park Rise, Harpenden, AL5 3AH13, Park Rise, Harpenden, AL5 3AH
• Sold Nov 2025£985,500 | 4 Bed House19, Ridge Avenue, Harpenden, AL5 3LT19, Ridge Avenue, Harpenden, AL5 3LT
• Sold Sep 2025£1,055,000 | 4 Bed House73, Park Rise, Harpenden, AL5 3AN73, Park Rise, Harpenden, AL5 3AN
• Sold Sep 2025£995,000 | 4 Bed House54, Carpenders Close, Harpenden, AL5 3HN54, Carpenders Close, Harpenden, AL5 3HN
• Sold Apr 2025£974,000 | 4 Bed House243, Luton Road, Harpenden, AL5 3DE243, Luton Road, Harpenden, AL5 3DE
• Sold Jun 2024£950,000 | 4 Bed House31, Yeomans Avenue, Harpenden, AL5 3EH31, Yeomans Avenue, Harpenden, AL5 3EH
• Sold Apr 2022£925,000 | 4 Bed House57, Park Mount, Harpenden, AL5 3AS57, Park Mount, Harpenden, AL5 3AS
• Sold Oct 2021£885,000 | 4 Bed House50A, Park Mount, Harpenden, AL5 3AR50A, Park Mount, Harpenden, AL5 3AR
• Sold May 2021£1,095,000 | 4 Bed House6, Roundwood Lane, Harpenden, AL5 3BZ6, Roundwood Lane, Harpenden, AL5 3BZ
• Sold Mar 2021£825,000 | 4 Bed House18, Ridgewood Gardens, Harpenden, AL5 3NN18, Ridgewood Gardens, Harpenden, AL5 3NN
• Sold Jan 2021£815,000 | 4 Bed House6, Ridgewood Gardens, Harpenden, AL5 3NN6, Ridgewood Gardens, Harpenden, AL5 3NN
• Sold May 2019£850,000 | 4 Bed House9A, How Field, Harpenden, AL5 3AU9A, How Field, Harpenden, AL5 3AU
• Sold Apr 2019£800,000 | 4 Bed House50, Park Mount, Harpenden, AL5 3AR50, Park Mount, Harpenden, AL5 3AR
• Sold Dec 2017£840,000 | 4 Bed House52, Park Mount, Harpenden, AL5 3AR52, Park Mount, Harpenden, AL5 3AR
• Sold Jun 2016£770,000 | 4 Bed House5, Ridgewood Gardens, Harpenden, AL5 3NN5, Ridgewood Gardens, Harpenden, AL5 3NN
• Sold Nov 2014£635,000 | 4 Bed House76, Park Rise, Harpenden, AL5 3AL76, Park Rise, Harpenden, AL5 3AL
• Sold Oct 2014£735,000 | 4 Bed House20C, Roundwood Lane, Harpenden, AL5 3BZ20C, Roundwood Lane, Harpenden, AL5 3BZ
• Sold Jul 2013£950,000 | 4 Bed House1, How Field, Harpenden, AL5 3AU1, How Field, Harpenden, AL5 3AU
• Sold Jan 2008£700,000 | 4 Bed House5A, How Field, Harpenden, AL5 3AU5A, How Field, Harpenden, AL5 3AU

How Field, Harpenden, AL5 has a total of 12 addresses. According to our analysis of all the public data, 9, How Field, Harpenden is the 10th largest and the 9th most expensive property on the street.

When compared to the postcode district it is £142k more expensive than the average property in AL5.

• Roundwood Primary School

  600 m away
• Wood End School

  600 m away
• St Nicholas CofE VA Primary School

  1.3 km away

• Roundwood Park School

  500 m away
• St George's School

  1.4 km away
• Sir John Lawes School

  1.9 km away

• Harpenden

  |

  1.8 km away
• Luton Airport Parkway

  |

  5.6 km away
• Luton

  |

  7.0 km away

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