HM Land Registry records the plot of land for 9, Byron Road, Harpenden as measuring 380 m².

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

9, Byron Road, Harpenden has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 26 Aug 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 9, Byron Road, Harpenden completed on 5th November 2025 at £800,000 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 1.1% over the period since November 2025.

• Sold Nov 2025£800,000
• Sold Jul 2005£340,000

Since 2017 79 properties similar to 9, Byron Road, Harpenden have sold within a radius of 700 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 17th April 2026, was 12, Pigeonwick, Harpenden, AL5 4EZ, a freehold house which sold for £800,000.

Read more about house prices in AL5.

• Sold Apr 2026£800,000 | 3 Bed House12, Pigeonwick, Harpenden, AL5 4EZ12, Pigeonwick, Harpenden, AL5 4EZ
• Sold Dec 2025£717,230 | 3 Bed House3, Park Mount, Harpenden, AL5 3AS3, Park Mount, Harpenden, AL5 3AS
• Sold Nov 2025£750,000 | 3 Bed House1, Lodge Gardens, Harpenden, AL5 4JE1, Lodge Gardens, Harpenden, AL5 4JE
• Sold Mar 2025£1,100,000 | 3 Bed House1, Lambourn Gardens, Harpenden, AL5 4DQ1, Lambourn Gardens, Harpenden, AL5 4DQ
• Sold Feb 2025£870,000 | 3 Bed House23, Hillside Road, Harpenden, AL5 4BS23, Hillside Road, Harpenden, AL5 4BS
• Sold Dec 2024£780,000 | 3 Bed House6, Lodge Gardens, Harpenden, AL5 4JE6, Lodge Gardens, Harpenden, AL5 4JE
• Sold Dec 2024£852,000 | 3 Bed House24, Park Mount, Harpenden, AL5 3AR24, Park Mount, Harpenden, AL5 3AR
• Sold Jul 2023£900,000 | 3 Bed House13, Pigeonwick, Harpenden, AL5 4EZ13, Pigeonwick, Harpenden, AL5 4EZ
• Sold Apr 2023£740,000 | 3 Bed House14 Maldon Court, Carlton Road, Harpenden, AL5 4TB14 Maldon Court, Carlton Road, Harpenden, AL5 4TB
• Sold Sep 2022£720,000 | 3 Bed House29, Aplins Close, Harpenden, AL5 2PZ29, Aplins Close, Harpenden, AL5 2PZ
• Sold Jul 2022£775,000 | 3 Bed House4, Hollybush Lane, Harpenden, AL5 4AP4, Hollybush Lane, Harpenden, AL5 4AP
• Sold Apr 2022£536,000 | 3 Bed House30, Aplins Close, Harpenden, AL5 2QB30, Aplins Close, Harpenden, AL5 2QB
• Sold Nov 2021£720,000 | 3 Bed House53, Aplins Close, Harpenden, AL5 2PZ53, Aplins Close, Harpenden, AL5 2PZ
• Sold Jul 2020£767,000 | 3 Bed House6, Hollybush Lane, Harpenden, AL5 4AR6, Hollybush Lane, Harpenden, AL5 4AR
• Sold Apr 2020£625,000 | 3 Bed House43, Aplins Close, Harpenden, AL5 2PZ43, Aplins Close, Harpenden, AL5 2PZ
• Sold Mar 2020£660,000 | 3 Bed House47, Aplins Close, Harpenden, AL5 2PZ47, Aplins Close, Harpenden, AL5 2PZ
• Sold Feb 2020£777,000 | 3 Bed House61, Aplins Close, Harpenden, AL5 2PZ61, Aplins Close, Harpenden, AL5 2PZ
• Sold Oct 2019£580,000 | 3 Bed House45, Aplins Close, Harpenden, AL5 2PZ45, Aplins Close, Harpenden, AL5 2PZ
• Sold Aug 2019£780,000 | 3 Bed House2, Pigeonwick, Harpenden, AL5 4EZ2, Pigeonwick, Harpenden, AL5 4EZ
• Sold Jun 2017£625,000 | 3 Bed House31, Aplins Close, Harpenden, AL5 2PZ31, Aplins Close, Harpenden, AL5 2PZ

Of the 19 addresses on Byron Road, Harpenden, AL5, 9, Byron Road, Harpenden comes out as the 18th largest and the 18th most expensive in our analysis of the public data.

It is also £156k less expensive than the average property across the AL5 district.

• St Nicholas CofE VA Primary School

  600 m away
• Roundwood Primary School

  800 m away
• Harpenden Academy

  900 m away

• St George's School

  500 m away
• Roundwood Park School

  900 m away
• Sir John Lawes School

  1.0 km away

• Harpenden

  |

  1.0 km away
• Luton Airport Parkway

  |

  6.1 km away
• Luton

  |

  7.6 km away

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