According to data from HM Land Registry, 23, Douglas Road, Harpenden sits on a plot of 520 m².

We have plot size data on 4 out of 4 other houses in the postcode and 23, Douglas Road, Harpenden sits on the 4th largest plot.

23, Douglas Road, Harpenden has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 18 Mar 2011.

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

According to HM Land Registry, 23, Douglas Road, Harpenden was last sold on 30th April 2012 for £900,000 and was recorded as a freehold house.

The property has had 2 sales since 1995.

Since April 2012, the market for similar properties has risen by 33.3%.

• Sold Apr 2012£900,000
• Sold Aug 1999£330,000

According to the Land Registry and our network of Estate Agents, there have been 123 sales of properties similar to 23, Douglas Road, Harpenden within a radius of 670 metres since 2015.

The most recent example is 12, Lambourn Gardens, Harpenden, AL5 4DQ, a freehold house which sold for £1,290,000 on the 31st October 2025.

Read more about house prices in AL5.

• Sold Oct 2025£1,290,000 | 4 Bed House12, Lambourn Gardens, Harpenden, AL5 4DQ12, Lambourn Gardens, Harpenden, AL5 4DQ
• Sold Jul 2025£1,375,000 | 4 Bed House16, Hitherfield Lane, Harpenden, AL5 4JD16, Hitherfield Lane, Harpenden, AL5 4JD
• Sold Feb 2025£1,325,000 | 4 Bed House3, Townsend Close, Harpenden, AL5 2RF3, Townsend Close, Harpenden, AL5 2RF
• Sold Jan 2025£1,150,000 | 4 Bed House16, Broadfields, Harpenden, AL5 2HJ16, Broadfields, Harpenden, AL5 2HJ
• Sold Jul 2024£1,325,000 | 4 Bed House1, Salisbury Avenue, Harpenden, AL5 2QQ1, Salisbury Avenue, Harpenden, AL5 2QQ
• Sold May 2024£1,360,000 | 4 Bed House1, Claygate Avenue, Harpenden, AL5 2HE1, Claygate Avenue, Harpenden, AL5 2HE
• Sold Jan 2024£1,500,000 | 4 Bed House11B, Douglas Road, Harpenden, AL5 2EN11B, Douglas Road, Harpenden, AL5 2EN
• Sold Aug 2023£1,515,000 | 4 Bed House8, Barns Dene, Harpenden, AL5 2HQ8, Barns Dene, Harpenden, AL5 2HQ
• Sold Feb 2023£1,425,000 | 4 Bed House9, Barns Dene, Harpenden, AL5 2HH9, Barns Dene, Harpenden, AL5 2HH
• Sold Dec 2022£1,515,000 | 4 Bed House39, Moreton End Lane, Harpenden, AL5 2HA39, Moreton End Lane, Harpenden, AL5 2HA
• Sold Jun 2022£1,285,000 | 4 Bed House6, Townsend Lane, Harpenden, AL5 2QE6, Townsend Lane, Harpenden, AL5 2QE
• Sold Apr 2022£1,465,000 | 4 Bed House14, Barns Dene, Harpenden, AL5 2HQ14, Barns Dene, Harpenden, AL5 2HQ
• Sold Jun 2021£1,150,000 | 4 Bed House21, Douglas Road, Harpenden, AL5 2EP21, Douglas Road, Harpenden, AL5 2EP
• Sold Feb 2021£1,065,000 | 4 Bed House6, Broadfields, Harpenden, AL5 2HJ6, Broadfields, Harpenden, AL5 2HJ
• Sold Jan 2021£1,220,000 | 4 Bed House16, Barns Dene, Harpenden, AL5 2HQ16, Barns Dene, Harpenden, AL5 2HQ
• Sold Dec 2020£868,000 | 4 Bed House17B, Douglas Road, Harpenden, AL5 2EN17B, Douglas Road, Harpenden, AL5 2EN
• Sold Sep 2020£1,100,000 | 4 Bed House6A, Moreton End Lane, Harpenden, AL5 2EX6A, Moreton End Lane, Harpenden, AL5 2EX
• Sold Dec 2018£1,400,000 | 4 Bed House42, Townsend Lane, Harpenden, AL5 2QS42, Townsend Lane, Harpenden, AL5 2QS
• Sold Aug 2015£950,000 | 4 Bed House35, Claygate Avenue, Harpenden, AL5 2HE35, Claygate Avenue, Harpenden, AL5 2HE
• Sold Jul 2015£1,000,000 | 4 Bed House24, Barns Dene, Harpenden, AL5 2HQ24, Barns Dene, Harpenden, AL5 2HQ

Douglas Road, Harpenden, AL5 has a total of 66 addresses. According to our analysis of all the public data, 23, Douglas Road, Harpenden is the 25th largest and the 26th most expensive property on the street.

When compared to the postcode district it is £365k more expensive than the average property in AL5.

• St Nicholas CofE VA Primary School

  500 m away
• Roundwood Primary School

  500 m away
• Harpenden Academy

  800 m away

• Roundwood Park School

  600 m away
• St George's School

  800 m away
• Sir John Lawes School

  1.3 km away

• Harpenden

  |

  1.0 km away
• Luton Airport Parkway

  |

  6.3 km away
• Luton

  |

  7.8 km away

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