According to data from HM Land Registry, 20, Dell Close, Harpenden sits on a plot of 233 m².

We have plot size data on 12 out of 13 other houses in the postcode and 20, Dell Close, Harpenden sits on the 6th largest plot.

20, Dell Close, Harpenden has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 18 Aug 2025.

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

According to HM Land Registry, 20, Dell Close, Harpenden was last sold on 31st May 2016 for £430,000 and was recorded as a freehold house.

The property has had 2 sales since 1995.

Since May 2016, the market for similar properties has risen by 66.5%.

• Sold May 2016£430,000
• Sold Dec 2015£590,000

According to the Land Registry and our network of Estate Agents, there have been 53 sales of properties similar to 20, Dell Close, Harpenden within a radius of 750 metres since 2007.

The most recent example is 15, Hyde View Road, Harpenden, AL5 4PA, a freehold house which sold for £655,000 on the 19th February 2026.

Read more about house prices in AL5.

• Sold Feb 2026£655,000 | 3 Bed House15, Hyde View Road, Harpenden, AL5 4PA15, Hyde View Road, Harpenden, AL5 4PA
• Sold Dec 2025£268,750 | 3 Bed House2, Dell Close, Harpenden, AL5 4HP2, Dell Close, Harpenden, AL5 4HP
• Sold May 2024£530,000 | 3 Bed House4, Dell Close, Harpenden, AL5 4HP4, Dell Close, Harpenden, AL5 4HP
• Sold Dec 2023£537,000 | 3 Bed House33, Springfield Crescent, Harpenden, AL5 4LG33, Springfield Crescent, Harpenden, AL5 4LG
• Sold Nov 2023£597,000 | 3 Bed House8, Moorland Road, Harpenden, AL5 4LA8, Moorland Road, Harpenden, AL5 4LA
• Sold Aug 2023£465,000 | 4 Bed House6, St. Martins Close, Harpenden, AL5 5JG6, St. Martins Close, Harpenden, AL5 5JG
• Sold Mar 2023£680,000 | 3 Bed House7, Rye Close, Harpenden, AL5 4LD7, Rye Close, Harpenden, AL5 4LD
• 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 Oct 2021£575,000 | 3 Bed House16, Dell Close, Harpenden, AL5 4HP16, Dell Close, Harpenden, AL5 4HP
• Sold Jul 2021£540,000 | 4 Bed House8A, Dell Close, Harpenden, AL5 4HP8A, Dell Close, Harpenden, AL5 4HP
• Sold Apr 2021£498,950 | 3 Bed House1, Lindley Close, Harpenden, AL5 4HS1, Lindley Close, Harpenden, AL5 4HS
• Sold Dec 2020£465,000 | 3 Bed House4, Lindley Close, Harpenden, AL5 4HS4, Lindley Close, Harpenden, AL5 4HS
• Sold Nov 2020£525,000 | 3 Bed House37, Springfield Crescent, Harpenden, AL5 4LG37, Springfield Crescent, Harpenden, AL5 4LG
• Sold Sep 2017£510,000 | 3 Bed House10, Lindley Close, Harpenden, AL5 4HS10, Lindley Close, Harpenden, AL5 4HS
• Sold Mar 2015£402,500 | 3 Bed House2A, Hyde View Road, Harpenden, AL5 4NZ2A, Hyde View Road, Harpenden, AL5 4NZ
• 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

Dell Close, Harpenden, AL5 has a total of 13 addresses. According to our analysis of all the public data, 20, Dell Close, Harpenden is the 5th largest and the 6th most expensive property on the street.

When compared to the postcode district it is £405k less expensive than the average property in AL5.

• 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

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