HM Land Registry records the plot of land for 18, Dell Close, Harpenden as measuring 224 m².

That makes it the 7th largest plot in the postcode, where 12 of the 13 other houses have recorded plot data.

18, Dell Close, Harpenden has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 08 Jul 2021.

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

The most recent sale of 18, Dell Close, Harpenden completed on 7th August 2015 at £405,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold twice.

Values of comparable properties have risen by 81.0% over the period since August 2015.

• Sold Aug 2015£405,000
• Sold Jan 2012£275,000

Since 2007 50 properties similar to 18, Dell Close, Harpenden have sold within a radius of 750 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 22nd January 2026, was 80, Westfield Road, Harpenden, AL5 4JU, a freehold house which sold for £540,000.

Read more about house prices in AL5.

• Sold Jan 2026£540,000 | 3 Bed House80, Westfield Road, Harpenden, AL5 4JU80, Westfield Road, Harpenden, AL5 4JU
• 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 Dec 2023£430,000 | 3 Bed House19, St. Martins Close, Harpenden, AL5 5JG19, St. Martins Close, Harpenden, AL5 5JG
• 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 Jul 2021£480,000 | 3 Bed House4, Hyde View Road, Harpenden, AL5 4NZ4, Hyde View Road, Harpenden, AL5 4NZ
• Sold Apr 2021£498,950 | 3 Bed House1, Lindley Close, Harpenden, AL5 4HS1, Lindley Close, Harpenden, AL5 4HS
• Sold Dec 2020£435,000 | 3 Bed House12, Willow Way, Harpenden, AL5 5JF12, Willow Way, Harpenden, AL5 5JF
• 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 Jan 2017£476,000 | 3 Bed House3 Lindley Court, Lindley Close, Harpenden, AL5 4HT3 Lindley Court, Lindley Close, Harpenden, AL5 4HT
• Sold Oct 2013£300,000 | 3 Bed House10, Dell Close, Harpenden, AL5 4HP10, Dell Close, Harpenden, AL5 4HP
• Sold Jul 2012£329,100 | 3 Bed House12, Dell Close, Harpenden, AL5 4HP12, Dell Close, Harpenden, AL5 4HP
• Sold May 2007£275,000 | 3 Bed House22, Dell Close, Harpenden, AL5 4HP22, Dell Close, Harpenden, AL5 4HP

Of the 13 addresses on Dell Close, Harpenden, AL5, 18, Dell Close, Harpenden comes out as the 13th largest and the 13th most expensive in our analysis of the public data.

It is also £454k less expensive than the average property across the AL5 district.

• 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

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