HM Land Registry records the plot of land for 9, Barns Dene, Harpenden as measuring 661 m².

That makes it the 18th largest plot in the postcode, where all 20 other houses have recorded plot data.

9, Barns Dene, Harpenden has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 22 Sep 2022.

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 9, Barns Dene, Harpenden completed on 16th February 2023 at £1,425,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 this is the property's only sale.

Values of comparable properties have dropped by 20.4% over the period since February 2023.

• Sold Feb 2023£1,425,000

Since 2015 109 properties similar to 9, Barns Dene, Harpenden have sold within a radius of 830 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 2nd June 2025, was 86, Townsend Lane, Harpenden, AL5 2RQ, a freehold house which sold for £1,445,000.

Read more about house prices in AL5.

• Sold Jun 2025£1,445,000 | 4 Bed House86, Townsend Lane, Harpenden, AL5 2RQ86, Townsend Lane, Harpenden, AL5 2RQ
• Sold Feb 2025£1,325,000 | 4 Bed House3, Townsend Close, Harpenden, AL5 2RF3, Townsend Close, Harpenden, AL5 2RF
• Sold May 2024£1,360,000 | 4 Bed House1, Claygate Avenue, Harpenden, AL5 2HE1, Claygate Avenue, Harpenden, AL5 2HE
• Sold May 2024£1,260,000 | 4 Bed House6, Barns Dene, Harpenden, AL5 2HQ6, Barns Dene, Harpenden, AL5 2HQ
• Sold Jan 2024£1,500,000 | 4 Bed House11B, Douglas Road, Harpenden, AL5 2EN11B, Douglas Road, Harpenden, AL5 2EN
• Sold Aug 2023£1,515,000 | 4 Bed House8, Barns Dene, Harpenden, AL5 2HQ8, Barns Dene, Harpenden, AL5 2HQ
• Sold Jul 2022£1,730,000 | 4 Bed House67, Townsend Lane, Harpenden, AL5 2RE67, Townsend Lane, Harpenden, AL5 2RE
• Sold Apr 2022£1,465,000 | 4 Bed House14, Barns Dene, Harpenden, AL5 2HQ14, Barns Dene, Harpenden, AL5 2HQ
• Sold Sep 2021£1,240,000 | 4 Bed House17, Longcroft Avenue, Harpenden, AL5 2RD17, Longcroft Avenue, Harpenden, AL5 2RD
• Sold Mar 2021£1,283,750 | 4 Bed House11, Hartwell Gardens, Harpenden, AL5 2RW11, Hartwell Gardens, Harpenden, AL5 2RW
• Sold Feb 2021£1,065,000 | 4 Bed House6, Broadfields, Harpenden, AL5 2HJ6, Broadfields, Harpenden, AL5 2HJ
• Sold Jan 2021£1,220,000 | 4 Bed House16, Barns Dene, Harpenden, AL5 2HQ16, Barns Dene, Harpenden, AL5 2HQ
• Sold Dec 2020£868,000 | 4 Bed House17B, Douglas Road, Harpenden, AL5 2EN17B, Douglas Road, Harpenden, AL5 2EN
• Sold Dec 2019£1,080,000 | 4 Bed House20, Hartwell Gardens, Harpenden, AL5 2RW20, Hartwell Gardens, Harpenden, AL5 2RW
• Sold Dec 2018£1,400,000 | 4 Bed House42, Townsend Lane, Harpenden, AL5 2QS42, Townsend Lane, Harpenden, AL5 2QS
• Sold Oct 2018£1,150,000 | 4 Bed House5, Claygate Avenue, Harpenden, AL5 2HE5, Claygate Avenue, Harpenden, AL5 2HE
• Sold Nov 2017£1,100,000 | 4 Bed House35, Barns Dene, Harpenden, AL5 2HH35, Barns Dene, Harpenden, AL5 2HH
• Sold Aug 2015£950,000 | 4 Bed House35, Claygate Avenue, Harpenden, AL5 2HE35, Claygate Avenue, Harpenden, AL5 2HE
• Sold Jul 2015£1,000,000 | 4 Bed House24, Barns Dene, Harpenden, AL5 2HQ24, Barns Dene, Harpenden, AL5 2HQ
• Sold May 2015£920,000 | 4 Bed House26, Barns Dene, Harpenden, AL5 2HQ26, Barns Dene, Harpenden, AL5 2HQ

Of the 37 addresses on Barns Dene, Harpenden, AL5, 9, Barns Dene, Harpenden comes out as the 29th largest and the 30th most expensive in our analysis of the public data.

It is also £394k more expensive than the average property across the AL5 district.

• Roundwood Primary School

  300 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

  |

  1.2 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.