27, Barns Dene, Harpenden occupies a 698 m² plot as recorded by HM Land Registry.

All 20 other houses in this postcode have recorded plot sizes, and this one ranks as the 14th largest.

27, Barns Dene, Harpenden has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 30 Nov 2023.

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

27, Barns Dene, Harpenden last changed hands on 12th September 2025, selling for £1,175,000. The transaction was logged as a freehold house by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has dropped by 21.3% since September 2025.

• Sold Sep 2025£1,175,000

Land Registry records and our Estate Agent network show 41 sales of comparable properties within 930 metres of 27, Barns Dene, Harpenden since 2011.

Most recently, 25, Moreton End Lane, Harpenden, AL5 2EY, a freehold house, sold at £1,160,000 on the 27th April 2026.

Read more about house prices in AL5.

• Sold Apr 2026£1,160,000 | 4 Bed House25, Moreton End Lane, Harpenden, AL5 2EY25, Moreton End Lane, Harpenden, AL5 2EY
• Sold Dec 2025£1,130,000 | 4 Bed House1, Byron Road, Harpenden, AL5 4AD1, Byron Road, Harpenden, AL5 4AD
• Sold May 2024£982,700 | 4 Bed House1, Timbers Court, Harpenden, AL5 2QA1, Timbers Court, Harpenden, AL5 2QA
• Sold Aug 2023£1,150,000 | 4 Bed House3, Hillside Road, Harpenden, AL5 4BS3, Hillside Road, Harpenden, AL5 4BS
• Sold Apr 2023£1,255,000 | 3 Bed House2, Townsend Lane, Harpenden, AL5 2QE2, Townsend Lane, Harpenden, AL5 2QE
• Sold Jan 2023£1,300,000 | 4 Bed House38, Townsend Lane, Harpenden, AL5 2QS38, Townsend Lane, Harpenden, AL5 2QS
• Sold Sep 2022£1,090,000 | 3 Bed House13, Claygate Avenue, Harpenden, AL5 2HE13, Claygate Avenue, Harpenden, AL5 2HE
• Sold Aug 2022£1,189,500 | 3 Bed House4, Townsend Close, Harpenden, AL5 2RF4, Townsend Close, Harpenden, AL5 2RF
• Sold Sep 2021£1,200,000 | 4 Bed House45, Luton Road, Harpenden, AL5 2UB45, Luton Road, Harpenden, AL5 2UB
• Sold Jun 2021£1,150,000 | 4 Bed House21, Douglas Road, Harpenden, AL5 2EP21, Douglas Road, Harpenden, AL5 2EP
• Sold Dec 2020£868,000 | 4 Bed House17B, Douglas Road, Harpenden, AL5 2EN17B, Douglas Road, Harpenden, AL5 2EN
• Sold Nov 2020£825,000 | 3 Bed House3, Moreton End Close, Harpenden, AL5 2EZ3, Moreton End Close, Harpenden, AL5 2EZ
• Sold Dec 2019£785,000 | 4 Bed House21, Claygate Avenue, Harpenden, AL5 2HE21, Claygate Avenue, Harpenden, AL5 2HE
• Sold Nov 2019£800,000 | 4 Bed House51, Moreton End Lane, Harpenden, AL5 2HA51, Moreton End Lane, Harpenden, AL5 2HA
• Sold Sep 2019£900,000 | 4 Bed House11, Claygate Avenue, Harpenden, AL5 2HE11, Claygate Avenue, Harpenden, AL5 2HE
• Sold May 2019£850,000 | 4 Bed House9A, How Field, Harpenden, AL5 3AU9A, How Field, Harpenden, AL5 3AU
• Sold Jan 2016£1,025,000 | 4 Bed House29, Claygate Avenue, Harpenden, AL5 2HE29, Claygate Avenue, Harpenden, AL5 2HE
• Sold Nov 2015£925,000 | 4 Bed House37, Claygate Avenue, Harpenden, AL5 2HE37, Claygate Avenue, Harpenden, AL5 2HE
• Sold Nov 2014£635,000 | 4 Bed House76, Park Rise, Harpenden, AL5 3AL76, Park Rise, Harpenden, AL5 3AL
• Sold Aug 2011£810,502 | 4 Bed House10, Barns Dene, Harpenden, AL5 2HQ10, Barns Dene, Harpenden, AL5 2HQ

Our analysis of the public data ranks 27, Barns Dene, Harpenden as the 36th largest and the 36th most expensive of the 37 addresses on Barns Dene, Harpenden, AL5.

Against the AL5 postcode district average, it is £182k more expensive than the typical property.

• 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

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