21B, Kinsbourne Close, Harpenden has an Energy Performance Rating (EPC) of B. This is based on the most recent assessment, dated 29 Apr 2025.

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

21B, Kinsbourne Close, Harpenden last changed hands on 20th September 2013, selling for £280,000. The transaction was logged as a leasehold flat by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has risen by 11.8% since September 2013.

• Sold Sep 2013£280,000

Land Registry records and our Estate Agent network show 15 sales of comparable properties within 1.6 kilometres of 21B, Kinsbourne Close, Harpenden since 2007.

Most recently, 1 Kennesbourne Court, Tuffnells Way, Harpenden, AL5 3HT, a leasehold flat, sold at £385,000 on the 19th September 2025.

Read more about house prices in AL5.

• Sold Sep 2025£385,000 | 2 Bed Flat1 Kennesbourne Court, Tuffnells Way, Harpenden, AL5 3HT1 Kennesbourne Court, Tuffnells Way, Harpenden, AL5 3HT
• Sold May 2024£435,000 | 2 Bed Flat2 Kennesbourne Court, Tuffnells Way, Harpenden, AL5 3HT2 Kennesbourne Court, Tuffnells Way, Harpenden, AL5 3HT
• Sold Nov 2023£290,000 | 2 Bed FlatApartment 12, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJApartment 12, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJ
• Sold Dec 2020£396,950 | 3 Bed FlatApartment 4, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJApartment 4, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJ
• Sold Jul 2020£415,000 | 2 Bed Flat21A, Kinsbourne Close, Harpenden, AL5 3PB21A, Kinsbourne Close, Harpenden, AL5 3PB
• Sold Aug 2019£385,000 | 3 Bed FlatApartment 7, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJApartment 7, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJ
• Sold Oct 2018£435,000 | 3 Bed Flat18, Park Mount, Harpenden, AL5 3AR18, Park Mount, Harpenden, AL5 3AR
• Sold May 2017£383,000 | 2 Bed FlatApartment 1, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJApartment 1, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJ
• Sold Mar 2016£370,000 | 3 Bed FlatApartment 3, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJApartment 3, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJ
• Sold Nov 2015£398,000 | 3 Bed FlatApartment 8, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJApartment 8, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJ
• Sold Oct 2015£360,000 | 2 Bed Flat6 Kennesbourne Court, Tuffnells Way, Harpenden, AL5 3HT6 Kennesbourne Court, Tuffnells Way, Harpenden, AL5 3HT
• Sold Mar 2015£890,000 | 2 Bed Flat1A, The Close, Harpenden, AL5 3NB1A, The Close, Harpenden, AL5 3NB
• Sold May 2014£292,500 | 2 Bed FlatApartment 2, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJApartment 2, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJ
• Sold Sep 2011£310,000 | 3 Bed FlatApartment 10, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJApartment 10, Roundwood Court, Roundwood Lane, Harpenden, AL5 3BJ
• Sold Jun 2007£232,000 | 2 Bed Flat77, Luton Road, Harpenden, AL5 3BA77, Luton Road, Harpenden, AL5 3BA

Our analysis of the public data ranks 21B, Kinsbourne Close, Harpenden as the 27th largest and the 28th most expensive of the 29 addresses on Kinsbourne Close, Harpenden, AL5.

Against the AL5 postcode district average, it is £544k less expensive than the typical property.

• Wood End School

  500 m away
• Roundwood Primary School

  1.5 km away
• The Lea Primary School and Nursery

  2.1 km away

• Roundwood Park School

  1.4 km away
• St George's School

  2.3 km away
• Sir John Lawes School

  2.8 km away

• Harpenden

  |

  2.8 km away
• Luton Airport Parkway

  |

  4.7 km away
• Luton

  |

  6.1 km away

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