HM Land Registry records the plot of land for 9A, How Field, Harpenden as measuring 281 m².

That makes it the 12th largest plot in the postcode, where all 12 other houses have recorded plot data.

The most recent sale of 9A, How Field, Harpenden completed on 20th May 2019 at £850,000 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 risen by 23.5% over the period since May 2019.

• Sold May 2019£850,000

Since 2010 155 properties similar to 9A, How Field, Harpenden have sold within a radius of 840 metres, per the Land Registry and our network of Estate Agents.

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

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 Nov 2025£985,500 | 4 Bed House19, Ridge Avenue, Harpenden, AL5 3LT19, Ridge Avenue, Harpenden, AL5 3LT
• Sold Oct 2025£1,200,000 | 4 Bed House46, Bloomfield Road, Harpenden, AL5 4DB46, Bloomfield Road, Harpenden, AL5 4DB
• Sold Oct 2025£1,510,000 | 4 Bed House4, Wood End Hill, Harpenden, AL5 3EZ4, Wood End Hill, Harpenden, AL5 3EZ
• Sold Sep 2025£1,055,000 | 4 Bed House73, Park Rise, Harpenden, AL5 3AN73, Park Rise, Harpenden, AL5 3AN
• Sold Apr 2025£974,000 | 4 Bed House243, Luton Road, Harpenden, AL5 3DE243, Luton Road, Harpenden, AL5 3DE
• Sold Mar 2024£970,000 | 4 Bed House11, Haslingden Close, Harpenden, AL5 3EW11, Haslingden Close, Harpenden, AL5 3EW
• Sold Dec 2022£875,000 | 4 Bed House35, Tuffnells Way, Harpenden, AL5 3HA35, Tuffnells Way, Harpenden, AL5 3HA
• Sold Sep 2022£1,103,178 | 4 Bed House59, Park Rise, Harpenden, AL5 3AP59, Park Rise, Harpenden, AL5 3AP
• Sold Jul 2022£995,000 | 4 Bed House32, Ashley Gardens, Harpenden, AL5 3EY32, Ashley Gardens, Harpenden, AL5 3EY
• Sold May 2022£1,025,000 | 4 Bed House51, Tuffnells Way, Harpenden, AL5 3HA51, Tuffnells Way, Harpenden, AL5 3HA
• Sold Mar 2022£1,125,000 | 4 Bed House4, Mayfield Close, Harpenden, AL5 3LG4, Mayfield Close, Harpenden, AL5 3LG
• Sold May 2021£852,500 | 4 Bed House3, Ridgewood Gardens, Harpenden, AL5 3NN3, Ridgewood Gardens, Harpenden, AL5 3NN
• Sold May 2021£1,095,000 | 4 Bed House6, Roundwood Lane, Harpenden, AL5 3BZ6, Roundwood Lane, Harpenden, AL5 3BZ
• Sold Jan 2021£815,000 | 4 Bed House6, Ridgewood Gardens, Harpenden, AL5 3NN6, Ridgewood Gardens, Harpenden, AL5 3NN
• Sold Nov 2014£635,000 | 4 Bed House76, Park Rise, Harpenden, AL5 3AL76, Park Rise, Harpenden, AL5 3AL
• Sold Aug 2014£765,000 | 4 Bed House58, Park Rise, Harpenden, AL5 3AL58, Park Rise, Harpenden, AL5 3AL
• Sold Jul 2013£950,000 | 4 Bed House1, How Field, Harpenden, AL5 3AU1, How Field, Harpenden, AL5 3AU
• Sold May 2013£680,000 | 4 Bed House29, Ridgewood Drive, Harpenden, AL5 3LJ29, Ridgewood Drive, Harpenden, AL5 3LJ
• Sold Dec 2010£752,500 | 4 Bed House18, Roundwood Lane, Harpenden, AL5 3BZ18, Roundwood Lane, Harpenden, AL5 3BZ

Of the 12 addresses on How Field, Harpenden, AL5, 9A, How Field, Harpenden comes out as the 11th largest and the 10th most expensive in our analysis of the public data.

It is also £126k more expensive than the average property across the AL5 district.

• 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

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