23, Hillside Road, Harpenden occupies a 450 m² plot as recorded by HM Land Registry.

Of the 23 other houses in this postcode, 17 have recorded plot sizes, and this one ranks as the 9th largest.

23, Hillside Road, Harpenden has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 19 Jul 2024.

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

23, Hillside Road, Harpenden last changed hands on 21st February 2025, selling for £870,000. The transaction was logged as a freehold house by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has risen by 37.9% since February 2025.

• Sold Feb 2025£870,000

Land Registry records and our Estate Agent network show 24 sales of comparable properties within 770 metres of 23, Hillside Road, Harpenden since 2010.

Most recently, 1A, Moreton End Close, Harpenden, AL5 2EZ, a freehold house, sold at £680,000 on the 12th November 2025.

Read more about house prices in AL5.

• Sold Nov 2025£680,000 | 3 Bed House1A, Moreton End Close, Harpenden, AL5 2EZ1A, Moreton End Close, Harpenden, AL5 2EZ
• Sold Nov 2025£800,000 | 3 Bed House9, Byron Road, Harpenden, AL5 4AD9, Byron Road, Harpenden, AL5 4AD
• Sold Oct 2025£900,000 | 3 Bed House84, Park Rise, Harpenden, AL5 3AL84, Park Rise, Harpenden, AL5 3AL
• Sold May 2025£740,000 | 3 Bed House7, Townsend Lane, Harpenden, AL5 2PY7, Townsend Lane, Harpenden, AL5 2PY
• Sold Mar 2025£1,100,000 | 3 Bed House1, Lambourn Gardens, Harpenden, AL5 4DQ1, Lambourn Gardens, Harpenden, AL5 4DQ
• Sold Aug 2024£862,500 | 3 Bed House48, Park Mount, Harpenden, AL5 3AR48, Park Mount, Harpenden, AL5 3AR
• Sold Dec 2022£720,000 | 3 Bed House1B, Hollybush Lane, Harpenden, AL5 4AL1B, Hollybush Lane, Harpenden, AL5 4AL
• Sold Sep 2022£780,000 | 3 Bed House79, Harpenden Rise, Harpenden, AL5 3BQ79, Harpenden Rise, Harpenden, AL5 3BQ
• Sold Jul 2022£775,000 | 3 Bed House4, Hollybush Lane, Harpenden, AL5 4AP4, Hollybush Lane, Harpenden, AL5 4AP
• Sold Jul 2022£756,000 | 3 Bed House72, Park Rise, Harpenden, AL5 3AL72, Park Rise, Harpenden, AL5 3AL
• Sold Dec 2021£640,000 | 3 Bed House10, Park Hill, Harpenden, AL5 3AT10, Park Hill, Harpenden, AL5 3AT
• Sold Jun 2021£845,000 | 3 Bed House43, Ambrose Lane, Harpenden, AL5 4BU43, Ambrose Lane, Harpenden, AL5 4BU
• Sold Jun 2019£750,000 | 3 Bed House2, Moreton End Close, Harpenden, AL5 2EZ2, Moreton End Close, Harpenden, AL5 2EZ
• Sold Sep 2018£800,000 | 3 Bed House7, Moreton End Close, Harpenden, AL5 2EZ7, Moreton End Close, Harpenden, AL5 2EZ
• Sold Aug 2016£925,000 | 3 Bed House5, Moreton End Close, Harpenden, AL5 2EZ5, Moreton End Close, Harpenden, AL5 2EZ
• Sold Mar 2016£625,000 | 3 Bed House21, Ridgewood Gardens, Harpenden, AL5 3NN21, Ridgewood Gardens, Harpenden, AL5 3NN
• Sold May 2015£515,000 | 3 Bed House14, Park Hill, Harpenden, AL5 3AT14, Park Hill, Harpenden, AL5 3AT
• Sold May 2015£690,000 | 3 Bed House33, Bloomfield Road, Harpenden, AL5 4DD33, Bloomfield Road, Harpenden, AL5 4DD
• Sold Aug 2014£484,200 | 3 Bed House11, Park Hill, Harpenden, AL5 3AT11, Park Hill, Harpenden, AL5 3AT
• Sold Oct 2010£500,000 | 3 Bed House1, Roundwood Park, Harpenden, AL5 3AB1, Roundwood Park, Harpenden, AL5 3AB

Our analysis of the public data ranks 23, Hillside Road, Harpenden as the 37th largest and the 37th most expensive of the 81 addresses on Hillside Road, Harpenden, AL5.

Against the AL5 postcode district average, it is £107k less expensive than the typical property.

• Roundwood Primary School

  800 m away
• The Lea Primary School and Nursery

  800 m away
• St Nicholas CofE VA Primary School

  900 m away

• St George's School

  700 m away
• Roundwood Park School

  800 m away
• Sir John Lawes School

  1.2 km away

• Harpenden

  |

  1.4 km away
• Luton Airport Parkway

  |

  5.8 km away
• Luton

  |

  7.3 km away

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