12, The Warren, Harpenden occupies a 1,525 m² plot as recorded by HM Land Registry.

All 17 other houses in this postcode have recorded plot sizes, and this one ranks as the 6th largest.

12, The Warren, Harpenden has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 03 May 2022.

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

12, The Warren, Harpenden last changed hands on 11th November 2022, selling for £2,385,000. 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 25.9% since November 2022.

• Sold Nov 2022£2,385,000

Land Registry records and our Estate Agent network show 30 sales of comparable properties within 1.2 kilometres of 12, The Warren, Harpenden since 2007.

Most recently, 19, Hawsley Road, Harpenden, AL5 2BL, a freehold house, sold at £1,680,000 on the 28th August 2025.

Read more about house prices in AL5.

• Sold Aug 2025£1,680,000 | 5 Bed House19, Hawsley Road, Harpenden, AL5 2BL19, Hawsley Road, Harpenden, AL5 2BL
• Sold Aug 2025£1,700,000 | 4 Bed House10, Dellcroft Way, Harpenden, AL5 2NG10, Dellcroft Way, Harpenden, AL5 2NG
• Sold Mar 2025£1,750,000 | 5 Bed House34, The Uplands, Harpenden, AL5 2NZ34, The Uplands, Harpenden, AL5 2NZ
• Sold Sep 2024£1,845,000 | 5 Bed House15, Hammondswick, Harpenden, AL5 2NR15, Hammondswick, Harpenden, AL5 2NR
• Sold Aug 2024£1,620,000 | 5 Bed House1, Cloisters, Harpenden, AL5 1DB1, Cloisters, Harpenden, AL5 1DB
• Sold Jul 2024£1,800,000 | 5 Bed House23, The Uplands, Harpenden, AL5 2PG23, The Uplands, Harpenden, AL5 2PG
• Sold May 2023£1,500,000 | 5 Bed House1, Wheatfield Road, Harpenden, AL5 2NY1, Wheatfield Road, Harpenden, AL5 2NY
• Sold Aug 2022£1,675,000 | 5 Bed House5, Netherfield Road, Harpenden, AL5 2AF5, Netherfield Road, Harpenden, AL5 2AF
• Sold Nov 2021£1,562,500 | 5 Bed House5, East Common, Harpenden, AL5 1BJ5, East Common, Harpenden, AL5 1BJ
• Sold Aug 2021£1,850,000 | 5 Bed House40, The Uplands, Harpenden, AL5 2NZ40, The Uplands, Harpenden, AL5 2NZ
• Sold Jun 2021£1,300,000 | 5 Bed House8, Penny Croft, Harpenden, AL5 2PB8, Penny Croft, Harpenden, AL5 2PB
• Sold Feb 2021£1,700,000 | 5 Bed HouseThe Kymin, East Common, Harpenden, AL5 1DGThe Kymin, East Common, Harpenden, AL5 1DG
• Sold Dec 2020£1,490,000 | 5 Bed House4, High Elms, Harpenden, AL5 2JU4, High Elms, Harpenden, AL5 2JU
• Sold Oct 2020£1,350,000 | 5 Bed House3, Flowton Grove, Harpenden, AL5 2JZ3, Flowton Grove, Harpenden, AL5 2JZ
• Sold May 2018£1,500,000 | 5 Bed House8, Grange Court Road, Harpenden, AL5 1BY8, Grange Court Road, Harpenden, AL5 1BY
• Sold Apr 2017£1,325,000 | 5 Bed House9 Maple Cottages, West Common, Harpenden, AL5 2AS9 Maple Cottages, West Common, Harpenden, AL5 2AS
• Sold Feb 2014£1,100,000 | 5 Bed House8, Hatching Green Close, Harpenden, AL5 2LB8, Hatching Green Close, Harpenden, AL5 2LB
• Sold Sep 2011£1,115,000 | 4 Bed House18, Oakfield Road, Harpenden, AL5 2NL18, Oakfield Road, Harpenden, AL5 2NL
• Sold Oct 2009£780,000 | 5 Bed House18, Hawsley Road, Harpenden, AL5 2BL18, Hawsley Road, Harpenden, AL5 2BL
• Sold Mar 2007£925,000 | 5 Bed HouseCrofton, Redbourn Lane, Harpenden, AL5 2AUCrofton, Redbourn Lane, Harpenden, AL5 2AU

Our analysis of the public data ranks 12, The Warren, Harpenden as the 16th largest and the 15th most expensive of the 17 addresses on The Warren, Harpenden, AL5.

Against the AL5 postcode district average, it is £802k more expensive than the typical property.

• St Dominic Catholic Primary School

  1.3 km away
• The Grove Junior School

  1.6 km away
• The Grove Infant and Nursery School

  1.6 km away

• St George's School

  2.4 km away
• Roundwood Park School

  2.4 km away
• Sir John Lawes School

  2.6 km away

• Harpenden

  |

  1.6 km away
• St Albans City

  |

  5.9 km away
• St Albans Abbey

  |

  6.3 km away

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