HM Land Registry records the plot of land for 4, Townsend Lane, Harpenden as measuring 460 m².

That makes it the 8th largest plot in the postcode, where all 8 other houses have recorded plot data.

4, Townsend Lane, Harpenden has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 05 Jun 2025.

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 4, Townsend Lane, Harpenden completed on 3rd September 2025 at £1,610,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold twice.

Values of comparable properties have dropped by 13.8% over the period since September 2025.

• Sold Sep 2025£1,610,000
• Sold Apr 1996£196,000

Since 2012 87 properties similar to 4, Townsend Lane, Harpenden have sold within a radius of 670 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 12th December 2025, was 10, Wordsworth Road, Harpenden, AL5 4AF, a freehold house which sold for £1,650,000.

Read more about house prices in AL5.

• Sold Dec 2025£1,650,000 | 5 Bed House10, Wordsworth Road, Harpenden, AL5 4AF10, Wordsworth Road, Harpenden, AL5 4AF
• Sold Nov 2025£1,515,000 | 5 Bed House3, Ambrose Lane, Harpenden, AL5 4AU3, Ambrose Lane, Harpenden, AL5 4AU
• Sold Mar 2025£1,615,000 | 5 Bed House45A, Moreton End Lane, Harpenden, AL5 2HA45A, Moreton End Lane, Harpenden, AL5 2HA
• Sold Feb 2025£1,605,000 | 4 Bed House9, Pondwick Road, Harpenden, AL5 2HG9, Pondwick Road, Harpenden, AL5 2HG
• Sold Aug 2024£1,685,000 | 5 Bed House24C, Douglas Road, Harpenden, AL5 2EW24C, Douglas Road, Harpenden, AL5 2EW
• Sold May 2024£1,260,000 | 4 Bed House6, Barns Dene, Harpenden, AL5 2HQ6, Barns Dene, Harpenden, AL5 2HQ
• Sold Jan 2024£1,375,000 | 4 Bed HouseCottage 1, The Bourne, Salisbury Avenue, Harpenden, AL5 2PSCottage 1, The Bourne, Salisbury Avenue, Harpenden, AL5 2PS
• Sold Nov 2023£1,450,000 | 5 Bed House3, Barns Dene, Harpenden, AL5 2HH3, Barns Dene, Harpenden, AL5 2HH
• Sold Aug 2023£1,325,000 | 5 Bed House45, Moreton End Lane, Harpenden, AL5 2HA45, Moreton End Lane, Harpenden, AL5 2HA
• Sold Aug 2023£1,400,000 | 5 Bed House16, Byron Road, Harpenden, AL5 4AB16, Byron Road, Harpenden, AL5 4AB
• Sold Mar 2023£1,507,500 | 4 Bed House21, Moreton End Lane, Harpenden, AL5 2EY21, Moreton End Lane, Harpenden, AL5 2EY
• Sold Feb 2023£1,425,000 | 4 Bed House9, Barns Dene, Harpenden, AL5 2HH9, Barns Dene, Harpenden, AL5 2HH
• Sold Dec 2022£1,650,000 | 4 Bed House1, The Drive, Harpenden, AL5 2EL1, The Drive, Harpenden, AL5 2EL
• Sold Apr 2022£1,465,000 | 4 Bed House14, Barns Dene, Harpenden, AL5 2HQ14, Barns Dene, Harpenden, AL5 2HQ
• Sold Oct 2021£1,290,000 | 5 Bed House25, Salisbury Avenue, Harpenden, AL5 2QF25, Salisbury Avenue, Harpenden, AL5 2QF
• Sold Jun 2021£1,850,000 | 4 Bed House29, Townsend Lane, Harpenden, AL5 2RN29, Townsend Lane, Harpenden, AL5 2RN
• Sold Jan 2021£1,220,000 | 4 Bed House16, Barns Dene, Harpenden, AL5 2HQ16, Barns Dene, Harpenden, AL5 2HQ
• Sold May 2020£1,150,000 | 5 Bed House23, Broadfields, Harpenden, AL5 2HJ23, Broadfields, Harpenden, AL5 2HJ
• Sold Nov 2019£1,350,000 | 4 Bed House11, Townsend Road, Harpenden, AL5 4BQ11, Townsend Road, Harpenden, AL5 4BQ
• Sold Oct 2012£980,000 | 4 Bed House11, Douglas Road, Harpenden, AL5 2EN11, Douglas Road, Harpenden, AL5 2EN

Of the 106 addresses on Townsend Lane, Harpenden, AL5, 4, Townsend Lane, Harpenden comes out as the 55th largest and the 41st most expensive in our analysis of the public data.

It is also £628k more expensive than the average property across the AL5 district.

• St Nicholas CofE VA Primary School

  300 m away
• Roundwood Primary School

  700 m away
• Harpenden Academy

  700 m away

• St George's School

  700 m away
• Roundwood Park School

  700 m away
• Sir John Lawes School

  1.2 km away

• Harpenden

  |

  800 m away
• Luton Airport Parkway

  |

  6.4 km away
• Luton

  |

  7.9 km away

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