21, Roughdown Avenue, Hemel Hempstead occupies a 778 m² plot as recorded by HM Land Registry.

Of the 39 other houses in this postcode, 35 have recorded plot sizes, and this one ranks as the 8th largest.

21, Roughdown Avenue, Hemel Hempstead has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 31 May 2024.

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

21, Roughdown Avenue, Hemel Hempstead last changed hands on 19th December 2025, selling for £495,000. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold 3 times since 1995.

The market for similar properties has dropped by 4.8% since December 2025.

• Sold Dec 2025£495,000
• Sold Oct 2009£239,952
• Sold Sep 1995£69,000

Land Registry records and our Estate Agent network show 184 sales of comparable properties within 890 metres of 21, Roughdown Avenue, Hemel Hempstead since 2009.

Most recently, 473, London Road, Hemel Hempstead, HP3 9BE, a freehold house, sold at £550,000 on the 12th December 2025.

Read more about house prices in HP3.

• Sold Dec 2025£550,000 | 3 Bed House473, London Road, Hemel Hempstead, HP3 9BE473, London Road, Hemel Hempstead, HP3 9BE
• Sold Aug 2025£485,000 | 3 Bed House22, Standring Rise, Hemel Hempstead, HP3 9AY22, Standring Rise, Hemel Hempstead, HP3 9AY
• Sold Jul 2025£535,000 | 3 Bed House6, Standring Rise, Hemel Hempstead, HP3 9AY6, Standring Rise, Hemel Hempstead, HP3 9AY
• Sold May 2025£567,000 | 3 Bed House19, Roughdown Avenue, Hemel Hempstead, HP3 9BH19, Roughdown Avenue, Hemel Hempstead, HP3 9BH
• Sold Mar 2025£625,000 | 3 Bed House44, Kingsland Road, Hemel Hempstead, HP1 1QD44, Kingsland Road, Hemel Hempstead, HP1 1QD
• Sold Dec 2024£374,800 | 3 Bed House32, Roughdown Road, Hemel Hempstead, HP3 9AX32, Roughdown Road, Hemel Hempstead, HP3 9AX
• Sold Aug 2024£510,000 | 3 Bed House23, Horsecroft Road, Hemel Hempstead, HP1 1PZ23, Horsecroft Road, Hemel Hempstead, HP1 1PZ
• Sold Jul 2024£555,000 | 3 Bed House72, Horsecroft Road, Hemel Hempstead, HP1 1PY72, Horsecroft Road, Hemel Hempstead, HP1 1PY
• Sold Jun 2024£490,000 | 3 Bed House56, Kingsland Road, Hemel Hempstead, HP1 1QD56, Kingsland Road, Hemel Hempstead, HP1 1QD
• Sold Mar 2024£450,000 | 3 Bed House200, St. Johns Road, Hemel Hempstead, HP1 1NR200, St. Johns Road, Hemel Hempstead, HP1 1NR
• Sold Mar 2024£505,000 | 4 Bed House20, Roughdown Avenue, Hemel Hempstead, HP3 9BH20, Roughdown Avenue, Hemel Hempstead, HP3 9BH
• Sold Sep 2022£470,000 | 3 Bed House11, Catlin Street, Hemel Hempstead, HP3 9AU11, Catlin Street, Hemel Hempstead, HP3 9AU
• Sold May 2022£345,000 | 3 Bed House30, Roughdown Road, Hemel Hempstead, HP3 9AX30, Roughdown Road, Hemel Hempstead, HP3 9AX
• Sold Feb 2022£580,000 | 3 Bed House13, Roughdown Avenue, Hemel Hempstead, HP3 9BH13, Roughdown Avenue, Hemel Hempstead, HP3 9BH
• Sold Nov 2021£500,000 | 3 Bed House6, Cowper Road, Hemel Hempstead, HP1 1PE6, Cowper Road, Hemel Hempstead, HP1 1PE
• Sold Mar 2021£535,000 | 3 Bed House30, Kingsland Road, Hemel Hempstead, HP1 1QD30, Kingsland Road, Hemel Hempstead, HP1 1QD
• Sold Jul 2020£490,000 | 3 Bed House64, Kingsland Road, Hemel Hempstead, HP1 1QD64, Kingsland Road, Hemel Hempstead, HP1 1QD
• Sold Aug 2016£535,000 | 3 Bed House7, Roughdown Avenue, Hemel Hempstead, HP3 9BH7, Roughdown Avenue, Hemel Hempstead, HP3 9BH
• Sold Nov 2012£320,000 | 3 Bed House34, Roughdown Avenue, Hemel Hempstead, HP3 9BH34, Roughdown Avenue, Hemel Hempstead, HP3 9BH
• Sold Jun 2009£260,000 | 3 Bed House18, Roughdown Avenue, Hemel Hempstead, HP3 9BH18, Roughdown Avenue, Hemel Hempstead, HP3 9BH

Our analysis of the public data ranks 21, Roughdown Avenue, Hemel Hempstead as the 33rd largest and the 33rd most expensive of the 39 addresses on Roughdown Avenue, Hemel Hempstead, HP3.

Against the HP3 postcode district average, it is £1k more expensive than the typical property.

• St Rose's Catholic Infant School

  800 m away
• Boxmoor Primary School

  900 m away
• South Hill Primary School

  1.2 km away

• The Hemel Hempstead School

  1.1 km away
• Laureate Academy

  1.9 km away
• John F Kennedy Catholic School

  2.2 km away

• Hemel Hempstead

  |

  200 m away
• Apsley

  |

  2.0 km away
• Kings Langley

  |

  5.2 km away

Environment Agency data suggests this area has a Very Low risk of flooding.