According to data from HM Land Registry, 18A, Douglas Road, Harpenden sits on a plot of 563 m².

We have plot size data on 13 out of 13 other houses in the postcode and 18A, Douglas Road, Harpenden sits on the 10th largest plot.

18A, Douglas Road, Harpenden has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 20 Oct 2010.

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

According to HM Land Registry, 18A, Douglas Road, Harpenden was last sold on 21st April 2011 for £795,000 and was recorded as a freehold house.

The property has had 3 sales since 1995.

Since April 2011, the market for similar properties has risen by 28.1%.

• Sold Apr 2011£795,000
• Sold Jul 2000£525,000
• Sold Mar 1996£180,000

According to the Land Registry and our network of Estate Agents, there have been 115 sales of properties similar to 18A, Douglas Road, Harpenden within a radius of 660 metres since 2012.

The most recent example is 3, Ambrose Lane, Harpenden, AL5 4AU, a freehold house which sold for £1,515,000 on the 4th November 2025.

Read more about house prices in AL5.

• Sold Nov 2025£1,515,000 | 5 Bed House3, Ambrose Lane, Harpenden, AL5 4AU3, Ambrose Lane, Harpenden, AL5 4AU
• Sold Sep 2025£1,610,000 | 4 Bed House4, Townsend Lane, Harpenden, AL5 2QE4, Townsend Lane, Harpenden, AL5 2QE
• Sold Jul 2025£1,305,000 | 4 Bed House12, Bloomfield Road, Harpenden, AL5 4DB12, Bloomfield Road, Harpenden, AL5 4DB
• Sold Jul 2025£1,595,000 | 4 Bed House14, Roundwood Park, Harpenden, AL5 3AB14, Roundwood Park, Harpenden, AL5 3AB
• Sold Apr 2025£1,370,000 | 5 Bed House43A, Moreton End Lane, Harpenden, AL5 2HA43A, Moreton End Lane, Harpenden, AL5 2HA
• Sold Mar 2025£1,615,000 | 5 Bed House45A, Moreton End Lane, Harpenden, AL5 2HA45A, Moreton End Lane, Harpenden, AL5 2HA
• Sold Sep 2024£1,470,000 | 5 Bed House19, Claygate Avenue, Harpenden, AL5 2HE19, Claygate Avenue, Harpenden, AL5 2HE
• Sold May 2024£1,260,000 | 4 Bed House6, Barns Dene, Harpenden, AL5 2HQ6, Barns Dene, Harpenden, AL5 2HQ
• Sold Jan 2024£1,500,000 | 4 Bed House11B, Douglas Road, Harpenden, AL5 2EN11B, Douglas Road, Harpenden, AL5 2EN
• Sold Nov 2023£1,450,000 | 5 Bed House3, Barns Dene, Harpenden, AL5 2HH3, Barns Dene, Harpenden, AL5 2HH
• Sold Aug 2023£1,515,000 | 4 Bed House8, Barns Dene, Harpenden, AL5 2HQ8, Barns Dene, Harpenden, AL5 2HQ
• 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 Apr 2022£1,465,000 | 4 Bed House14, Barns Dene, Harpenden, AL5 2HQ14, Barns Dene, Harpenden, AL5 2HQ
• 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

Douglas Road, Harpenden, AL5 has a total of 66 addresses. According to our analysis of all the public data, 18A, Douglas Road, Harpenden is the 22nd largest and the 22nd most expensive property on the street.

When compared to the postcode district it is £544k more expensive than the average property in AL5.

• St Nicholas CofE VA Primary School

  600 m away
• Roundwood Primary School

  600 m away
• Harpenden Academy

  900 m away

• Roundwood Park School

  700 m away
• St George's School

  700 m away
• Sir John Lawes School

  1.2 km away

• Harpenden

  |

  1.0 km away
• Luton Airport Parkway

  |

  6.2 km away
• Luton

  |

  7.6 km away

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