HM Land Registry records the plot of land for 20B, The Close, Harpenden as measuring 1,226 m².

That makes it the largest plot in the postcode, where 4 of the 5 other houses have recorded plot data.

20B, The Close, Harpenden has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 16 Jan 2025.

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

The most recent sale of 20B, The Close, Harpenden completed on 12th April 2007 at £830,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold twice.

Values of comparable properties have risen by 124.0% over the period since April 2007.

• Sold Apr 2007£830,000
• Sold Aug 1997£275,000

Since 2016 48 properties similar to 20B, The Close, Harpenden have sold within a radius of 1.4 kilometres, per the Land Registry and our network of Estate Agents.

The latest, on the 29th January 2026, was 26, Roundwood Lane, Harpenden, AL5 3BZ, a freehold house which sold for £1,530,000.

Read more about house prices in AL5.

• Sold Jan 2026£1,530,000 | 5 Bed House26, Roundwood Lane, Harpenden, AL5 3BZ26, Roundwood Lane, Harpenden, AL5 3BZ
• 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 May 2025£1,760,000 | 4 Bed House32, Roundwood Park, Harpenden, AL5 3AF32, Roundwood Park, Harpenden, AL5 3AF
• Sold Dec 2024£1,540,000 | 5 Bed House22, Roundwood Lane, Harpenden, AL5 3BZ22, Roundwood Lane, Harpenden, AL5 3BZ
• Sold Sep 2024£1,470,000 | 5 Bed House19, Claygate Avenue, Harpenden, AL5 2HE19, Claygate Avenue, Harpenden, AL5 2HE
• Sold May 2024£1,360,000 | 4 Bed House1, Claygate Avenue, Harpenden, AL5 2HE1, Claygate Avenue, Harpenden, AL5 2HE
• Sold Jan 2024£276,500 | 5 Bed House6, Osprey Close, Harpenden, AL5 3FA6, Osprey Close, Harpenden, AL5 3FA
• Sold Jan 2024£271,500 | 5 Bed House7, Osprey Close, Harpenden, AL5 3FA7, Osprey Close, Harpenden, AL5 3FA
• Sold Oct 2023£1,585,000 | 4 Bed House44, Roundwood Lane, Harpenden, AL5 3BU44, Roundwood Lane, Harpenden, AL5 3BU
• Sold Jun 2023£1,453,000 | 4 Bed House4, Medlows, Harpenden, AL5 3AY4, Medlows, Harpenden, AL5 3AY
• Sold May 2023£1,380,000 | 4 Bed House7, Wood End Road, Harpenden, AL5 3EE7, Wood End Road, Harpenden, AL5 3EE
• Sold Mar 2023£1,510,000 | 5 Bed House18, Roundwood Park, Harpenden, AL5 3AB18, Roundwood Park, Harpenden, AL5 3AB
• Sold Aug 2022£1,825,000 | 5 Bed House24, Roundwood Park, Harpenden, AL5 3AF24, Roundwood Park, Harpenden, AL5 3AF
• Sold Jul 2022£1,425,000 | 4 Bed House38, Roundwood Lane, Harpenden, AL5 3BX38, Roundwood Lane, Harpenden, AL5 3BX
• Sold May 2021£1,305,000 | 5 Bed House56, Roundwood Lane, Harpenden, AL5 3EP56, Roundwood Lane, Harpenden, AL5 3EP
• Sold Mar 2021£1,335,000 | 4 Bed House67, Roundwood Lane, Harpenden, AL5 3BS67, Roundwood Lane, Harpenden, AL5 3BS
• Sold Mar 2021£1,350,000 | 4 Bed House10, Medlows, Harpenden, AL5 3AY10, Medlows, Harpenden, AL5 3AY
• Sold Nov 2018£1,250,000 | 5 Bed House7, Medlows, Harpenden, AL5 3AY7, Medlows, Harpenden, AL5 3AY
• Sold Aug 2016£1,372,000 | 5 Bed House10, Wood End Hill, Harpenden, AL5 3EZ10, Wood End Hill, Harpenden, AL5 3EZ

Of the 49 addresses on The Close, Harpenden, AL5, 20B, The Close, Harpenden comes out as the 10th largest and the most expensive in our analysis of the public data.

It is also £610k more expensive than the average property across the AL5 district.

• Wood End School

  400 m away
• Roundwood Primary School

  1.4 km away
• The Lea Primary School and Nursery

  2.1 km away

• Roundwood Park School

  1.3 km away
• St George's School

  2.2 km away
• Sir John Lawes School

  2.7 km away

• Harpenden

  |

  2.7 km away
• Luton Airport Parkway

  |

  4.9 km away
• Luton

  |

  6.2 km away

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