12, Dell Close, Harpenden occupies a 281 m² plot as recorded by HM Land Registry.

Of the 13 other houses in this postcode, 12 have recorded plot sizes, and this one ranks as the 5th largest.

12, Dell Close, Harpenden has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 26 Aug 2021.

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

12, Dell Close, Harpenden last changed hands on 6th July 2012, selling for £329,100. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold 3 times since 1995.

The market for similar properties has risen by 129.1% since July 2012.

• Sold Jul 2012£329,100
• Sold Jan 2007£285,000
• Sold Mar 1995£47,000

Land Registry records and our Estate Agent network show 55 sales of comparable properties within 750 metres of 12, Dell Close, Harpenden since 2007.

Most recently, 27, Springfield Crescent, Harpenden, AL5 4LG, a freehold house, sold at £585,000 on the 11th December 2025.

Read more about house prices in AL5.

• Sold Dec 2025£585,000 | 3 Bed House27, Springfield Crescent, Harpenden, AL5 4LG27, Springfield Crescent, Harpenden, AL5 4LG
• Sold Dec 2025£268,750 | 3 Bed House2, Dell Close, Harpenden, AL5 4HP2, Dell Close, Harpenden, AL5 4HP
• Sold Jul 2025£506,500 | 3 Bed House9, St. Martins Close, Harpenden, AL5 5JG9, St. Martins Close, Harpenden, AL5 5JG
• Sold Mar 2025£485,000 | 3 Bed House8, Willow Way, Harpenden, AL5 5JF8, Willow Way, Harpenden, AL5 5JF
• Sold Apr 2024£600,000 | 3 Bed House32, Westfield Drive, Harpenden, AL5 4LP32, Westfield Drive, Harpenden, AL5 4LP
• Sold Sep 2022£590,000 | 3 Bed House3, Lindley Close, Harpenden, AL5 4HS3, Lindley Close, Harpenden, AL5 4HS
• Sold Aug 2022£550,000 | 3 Bed House66, Westfield Road, Harpenden, AL5 4JU66, Westfield Road, Harpenden, AL5 4JU
• Sold Jul 2022£590,000 | 3 Bed House14, Dell Close, Harpenden, AL5 4HP14, Dell Close, Harpenden, AL5 4HP
• Sold Dec 2021£470,000 | 3 Bed House6, Lindley Close, Harpenden, AL5 4HS6, Lindley Close, Harpenden, AL5 4HS
• Sold Oct 2021£575,000 | 3 Bed House16, Dell Close, Harpenden, AL5 4HP16, Dell Close, Harpenden, AL5 4HP
• Sold Jul 2021£480,000 | 3 Bed House4, Hyde View Road, Harpenden, AL5 4NZ4, Hyde View Road, Harpenden, AL5 4NZ
• Sold Jun 2021£540,000 | 3 Bed House18, Dell Close, Harpenden, AL5 4HP18, Dell Close, Harpenden, AL5 4HP
• Sold Apr 2021£498,950 | 3 Bed House1, Lindley Close, Harpenden, AL5 4HS1, Lindley Close, Harpenden, AL5 4HS
• Sold Aug 2020£465,000 | 3 Bed House15, Lindley Close, Harpenden, AL5 4HS15, Lindley Close, Harpenden, AL5 4HS
• Sold Feb 2020£405,000 | 3 Bed House4 Lindley Court, Lindley Close, Harpenden, AL5 4HT4 Lindley Court, Lindley Close, Harpenden, AL5 4HT
• Sold Apr 2019£490,000 | 3 Bed House9, Lindley Close, Harpenden, AL5 4HS9, Lindley Close, Harpenden, AL5 4HS
• Sold Sep 2017£510,000 | 3 Bed House10, Lindley Close, Harpenden, AL5 4HS10, Lindley Close, Harpenden, AL5 4HS
• Sold May 2016£430,000 | 3 Bed House20, Dell Close, Harpenden, AL5 4HP20, Dell Close, Harpenden, AL5 4HP
• Sold Oct 2013£300,000 | 3 Bed House10, Dell Close, Harpenden, AL5 4HP10, Dell Close, Harpenden, AL5 4HP
• Sold May 2007£275,000 | 3 Bed House22, Dell Close, Harpenden, AL5 4HP22, Dell Close, Harpenden, AL5 4HP

Our analysis of the public data ranks 12, Dell Close, Harpenden as the 10th largest and the 11th most expensive of the 13 addresses on Dell Close, Harpenden, AL5.

Against the AL5 postcode district average, it is £445k less expensive than the typical property.

• The Lea Primary School and Nursery

  400 m away
• Manland Primary School

  500 m away
• St Nicholas CofE VA Primary School

  1.0 km away

• St George's School

  400 m away
• Sir John Lawes School

  600 m away
• Roundwood Park School

  1.5 km away

• Harpenden

  |

  1.2 km away
• Luton Airport Parkway

  |

  6.0 km away
• Luton

  |

  7.5 km away

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