According to data from HM Land Registry, 3, The Warren, Harpenden sits on a plot of 1,397 m².

We have plot size data on 17 out of 17 other houses in the postcode and 3, The Warren, Harpenden sits on the 10th largest plot.

3, The Warren, Harpenden has an Energy Performance Rating (EPC) of B. This is based on the most recent assessment, dated 25 Sep 2020.

The property is connected to mains gas and has high performance glazing. It is heated using a boiler and radiators (mains gas).

According to HM Land Registry, 3, The Warren, Harpenden was last sold on 19th October 2018 for £1,412,626 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since October 2018, the market for similar properties has dropped by 11.3%.

• Sold Oct 2018£1,412,626

According to the Land Registry and our network of Estate Agents, there have been 22 sales of properties similar to 3, The Warren, Harpenden within a radius of 1.3 kilometres since 2010.

The most recent example is 44, The Uplands, Harpenden, AL5 2NZ, a freehold house which sold for £1,725,000 on the 14th August 2025.

Read more about house prices in AL5.

• Sold Aug 2025£1,725,000 | 5 Bed House44, The Uplands, Harpenden, AL5 2NZ44, The Uplands, Harpenden, AL5 2NZ
• Sold Aug 2025£3,500,000 | 5 Bed House13, Oakhurst Avenue, Harpenden, AL5 2NB13, Oakhurst Avenue, Harpenden, AL5 2NB
• Sold Jul 2025£2,500,000 | 5 Bed House9, The Uplands, Harpenden, AL5 2PG9, The Uplands, Harpenden, AL5 2PG
• Sold Jun 2025£2,950,000 | 5 Bed House22, Prospect Lane, Harpenden, AL5 2PL22, Prospect Lane, Harpenden, AL5 2PL
• Sold Mar 2025£3,250,000 | 5 Bed House34A, Oakfield Road, Harpenden, AL5 2NS34A, Oakfield Road, Harpenden, AL5 2NS
• Sold Mar 2024£3,250,000 | 5 Bed House27, The Uplands, Harpenden, AL5 2PG27, The Uplands, Harpenden, AL5 2PG
• Sold Dec 2021£2,725,000 | 5 Bed House1, Garden Close, Harpenden, AL5 2EG1, Garden Close, Harpenden, AL5 2EG
• Sold Nov 2021£2,700,000 | 5 Bed HouseWoodlands, East Common, Harpenden, AL5 1DGWoodlands, East Common, Harpenden, AL5 1DG
• Sold Sep 2021£2,750,000 | 5 Bed House31, Oakfield Road, Harpenden, AL5 2NP31, Oakfield Road, Harpenden, AL5 2NP
• Sold May 2021£2,200,000 | 5 Bed House13, The Warren, Harpenden, AL5 2NH13, The Warren, Harpenden, AL5 2NH
• Sold Jul 2020£1,100,000 | 5 Bed HouseAwen, Redbourn Lane, Harpenden, AL5 2AUAwen, Redbourn Lane, Harpenden, AL5 2AU
• Sold Mar 2018£2,555,000 | 5 Bed House29, West Common Way, Harpenden, AL5 2LH29, West Common Way, Harpenden, AL5 2LH
• Sold Nov 2017£2,150,000 | 5 Bed House10, Oakfield Road, Harpenden, AL5 2NE10, Oakfield Road, Harpenden, AL5 2NE
• Sold Oct 2017£1,585,000 | 5 Bed House46, Oakfield Road, Harpenden, AL5 2NS46, Oakfield Road, Harpenden, AL5 2NS
• Sold Sep 2017£2,100,000 | 5 Bed House18, The Uplands, Harpenden, AL5 2PQ18, The Uplands, Harpenden, AL5 2PQ
• Sold Apr 2017£2,750,000 | 5 Bed House5, High Elms, Harpenden, AL5 2JU5, High Elms, Harpenden, AL5 2JU
• Sold Sep 2012£1,585,000 | 5 Bed House50, Oakfield Road, Harpenden, AL5 2NS50, Oakfield Road, Harpenden, AL5 2NS
• Sold Mar 2012£2,150,000 | 5 Bed House23, Oakfield Road, Harpenden, AL5 2NW23, Oakfield Road, Harpenden, AL5 2NW
• Sold Oct 2011£2,250,000 | 5 Bed House20, The Uplands, Harpenden, AL5 2PQ20, The Uplands, Harpenden, AL5 2PQ
• Sold Nov 2010£2,025,000 | 5 Bed House16, Wheatfield Road, Harpenden, AL5 2NY16, Wheatfield Road, Harpenden, AL5 2NY

The Warren, Harpenden, AL5 has a total of 17 addresses. According to our analysis of all the public data, 3, The Warren, Harpenden is the 3rd largest and the 4th most expensive property on the street.

When compared to the postcode district it is £2.082m more expensive than the average property in AL5.

• 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

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.