HM Land Registry records the plot of land for 12, Barns Dene, Harpenden as measuring 870 m².

That makes it the largest plot in the postcode, where all 17 other houses have recorded plot data.

12, Barns Dene, Harpenden has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 29 Jun 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 12, Barns Dene, Harpenden completed on 26th October 2021 at £1,490,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold twice.

Values of comparable properties have dropped by 24.4% over the period since October 2021.

• Sold Oct 2021£1,490,000
• Sold Jan 2005£657,500

Since 2007 96 properties similar to 12, Barns Dene, Harpenden have sold within a radius of 850 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 26th November 2025, was 22, Hartwell Gardens, Harpenden, AL5 2RW, a freehold house which sold for £1,750,000.

Read more about house prices in AL5.

• Sold Nov 2025£1,750,000 | 5 Bed House22, Hartwell Gardens, Harpenden, AL5 2RW22, Hartwell Gardens, Harpenden, AL5 2RW
• Sold Apr 2025£1,370,000 | 5 Bed House43A, Moreton End Lane, Harpenden, AL5 2HA43A, Moreton End Lane, Harpenden, AL5 2HA
• Sold Mar 2025£1,615,000 | 5 Bed House45A, Moreton End Lane, Harpenden, AL5 2HA45A, Moreton End Lane, Harpenden, AL5 2HA
• Sold Jan 2025£1,250,000 | 5 Bed House65, Townsend Lane, Harpenden, AL5 2RE65, Townsend Lane, Harpenden, AL5 2RE
• Sold Sep 2024£1,470,000 | 5 Bed House19, Claygate Avenue, Harpenden, AL5 2HE19, Claygate Avenue, Harpenden, AL5 2HE
• Sold Sep 2024£1,835,000 | 5 Bed House8, Hartwell Gardens, Harpenden, AL5 2RW8, Hartwell Gardens, Harpenden, AL5 2RW
• Sold Feb 2024£1,810,001 | 5 Bed House22, Barns Dene, Harpenden, AL5 2HQ22, Barns Dene, Harpenden, AL5 2HQ
• Sold Nov 2023£1,450,000 | 5 Bed House3, Barns Dene, Harpenden, AL5 2HH3, Barns Dene, Harpenden, AL5 2HH
• Sold Jul 2022£1,425,000 | 5 Bed House27, Claygate Avenue, Harpenden, AL5 2HE27, Claygate Avenue, Harpenden, AL5 2HE
• Sold Jun 2021£1,525,000 | 5 Bed House29, Barns Dene, Harpenden, AL5 2HH29, Barns Dene, Harpenden, AL5 2HH
• Sold Aug 2020£1,089,000 | 5 Bed House12, Broadfields, Harpenden, AL5 2HJ12, Broadfields, Harpenden, AL5 2HJ
• Sold May 2020£1,150,000 | 5 Bed House23, Broadfields, Harpenden, AL5 2HJ23, Broadfields, Harpenden, AL5 2HJ
• Sold Sep 2017£1,190,700 | 5 Bed House4, Barns Dene, Harpenden, AL5 2HQ4, Barns Dene, Harpenden, AL5 2HQ
• Sold Aug 2016£1,375,000 | 5 Bed House21, Barns Dene, Harpenden, AL5 2HH21, Barns Dene, Harpenden, AL5 2HH
• Sold May 2015£1,320,000 | 5 Bed House19, Broadfields, Harpenden, AL5 2HJ19, Broadfields, Harpenden, AL5 2HJ
• Sold Dec 2014£1,365,000 | 5 Bed House39, Barns Dene, Harpenden, AL5 2HH39, Barns Dene, Harpenden, AL5 2HH
• Sold Oct 2012£985,000 | 5 Bed House33, Barns Dene, Harpenden, AL5 2HH33, Barns Dene, Harpenden, AL5 2HH
• Sold Mar 2012£975,000 | 5 Bed House7, Claygate Avenue, Harpenden, AL5 2HE7, Claygate Avenue, Harpenden, AL5 2HE
• Sold Oct 2011£970,000 | 5 Bed House41, Claygate Avenue, Harpenden, AL5 2HE41, Claygate Avenue, Harpenden, AL5 2HE
• Sold Aug 2007£900,000 | 5 Bed House18, Barns Dene, Harpenden, AL5 2HQ18, Barns Dene, Harpenden, AL5 2HQ

Of the 37 addresses on Barns Dene, Harpenden, AL5, 12, Barns Dene, Harpenden comes out as the 12th largest and the 17th most expensive in our analysis of the public data.

It is also £629k more expensive than the average property across the AL5 district.

• Roundwood Primary School

  200 m away
• St Nicholas CofE VA Primary School

  800 m away
• Harpenden Academy

  1.1 km away

• Roundwood Park School

  300 m away
• St George's School

  1.2 km away
• Sir John Lawes School

  1.7 km away

• Harpenden

  |

  1.3 km away
• Luton Airport Parkway

  |

  6.4 km away
• Luton

  |

  7.8 km away

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