8, Knowle Drive, Harpenden has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 08 Apr 2026.

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 8, Knowle Drive, Harpenden completed on 22nd December 2009 at £279,950 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold twice.

Values of comparable properties have risen by 138.0% over the period since December 2009.

• Sold Dec 2009£279,950
• Sold Dec 2002£226,000

Since 2021 206 properties similar to 8, Knowle Drive, Harpenden have sold within a radius of 600 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 20th January 2026, was 15, Fovant Close, Harpenden, AL5 1RN, a freehold house which sold for £580,000.

Read more about house prices in AL5.

• Sold Jan 2026£580,000 | 3 Bed House15, Fovant Close, Harpenden, AL5 1RN15, Fovant Close, Harpenden, AL5 1RN
• Sold Jan 2026£610,000 | 3 Bed House4, Ravenscroft, Harpenden, AL5 1ST4, Ravenscroft, Harpenden, AL5 1ST
• Sold Oct 2025£645,000 | 3 Bed House9, Tarrant Drive, Harpenden, AL5 1RP9, Tarrant Drive, Harpenden, AL5 1RP
• Sold Aug 2025£680,000 | 3 Bed House31, Cranbourne Drive, Harpenden, AL5 1RJ31, Cranbourne Drive, Harpenden, AL5 1RJ
• Sold Jul 2025£655,000 | 3 Bed House5, Tarrant Drive, Harpenden, AL5 1RP5, Tarrant Drive, Harpenden, AL5 1RP
• Sold Feb 2025£635,000 | 4 Bed House15, Pendennis Court, Harpenden, AL5 1SG15, Pendennis Court, Harpenden, AL5 1SG
• Sold Feb 2025£670,000 | 3 Bed House71, Broadstone Road, Harpenden, AL5 1RE71, Broadstone Road, Harpenden, AL5 1RE
• Sold Oct 2024£680,000 | 3 Bed House22, Barrons Row, Harpenden, AL5 1SD22, Barrons Row, Harpenden, AL5 1SD
• Sold Aug 2024£700,000 | 3 Bed House37, Coleswood Road, Harpenden, AL5 1EF37, Coleswood Road, Harpenden, AL5 1EF
• Sold Aug 2024£595,000 | 4 Bed House1, Barrons Row, Harpenden, AL5 1SD1, Barrons Row, Harpenden, AL5 1SD
• Sold Jul 2024£575,000 | 3 Bed House7, Tarrant Drive, Harpenden, AL5 1RP7, Tarrant Drive, Harpenden, AL5 1RP
• Sold May 2024£595,000 | 3 Bed House21, Eastcote Drive, Harpenden, AL5 1SE21, Eastcote Drive, Harpenden, AL5 1SE
• Sold Apr 2024£720,000 | 3 Bed House9, Hawthorn Close, Harpenden, AL5 1HN9, Hawthorn Close, Harpenden, AL5 1HN
• Sold Dec 2023£640,000 | 3 Bed House3, Barrons Row, Harpenden, AL5 1SD3, Barrons Row, Harpenden, AL5 1SD
• Sold Sep 2023£545,000 | 3 Bed House12, Pendennis Court, Harpenden, AL5 1SG12, Pendennis Court, Harpenden, AL5 1SG
• Sold Dec 2022£695,000 | 3 Bed House18, Tarrant Drive, Harpenden, AL5 1RP18, Tarrant Drive, Harpenden, AL5 1RP
• Sold Oct 2022£665,000 | 3 Bed House15, Tarrant Drive, Harpenden, AL5 1RP15, Tarrant Drive, Harpenden, AL5 1RP
• Sold Sep 2022£660,000 | 3 Bed House1, Pendennis Court, Harpenden, AL5 1SG1, Pendennis Court, Harpenden, AL5 1SG
• Sold Jul 2022£625,000 | 3 Bed House10, Broadstone Road, Harpenden, AL5 1RG10, Broadstone Road, Harpenden, AL5 1RG
• Sold Sep 2021£541,000 | 3 Bed House48, Coleswood Road, Harpenden, AL5 1EQ48, Coleswood Road, Harpenden, AL5 1EQ

Of the 34 addresses on Knowle Drive, Harpenden, AL5, 8, Knowle Drive, Harpenden comes out as the 8th largest and the 11th most expensive in our analysis of the public data.

It is also £338k less expensive than the average property across the AL5 district.

• The Grove Infant and Nursery School

  400 m away
• The Grove Junior School

  400 m away
• High Beeches Primary School

  1.0 km away

• Sir John Lawes School

  2.0 km away
• Katherine Warington School

  2.0 km away
• St George's School

  2.2 km away

• Harpenden

  |

  1.4 km away
• St Albans City

  |

  6.1 km away
• St Albans Abbey

  |

  6.7 km away

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