HM Land Registry records the plot of land for 4, Otterton Close, Harpenden as measuring 429 m².

That makes it the 2nd largest plot in the postcode, where 11 of the 13 other houses have recorded plot data.

4, Otterton Close, Harpenden has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 13 Feb 2020.

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 4, Otterton Close, Harpenden completed on 6th August 2010 at £662,000 and was recorded by HM Land Registry as a freehold house.

Since 1995 the property has sold 3 times.

Values of comparable properties have risen by 77.2% over the period since August 2010.

• Sold Aug 2010£662,000
• Sold Oct 2006£552,500
• Sold Jul 1998£249,950

Since 2017 149 properties similar to 4, Otterton Close, Harpenden have sold within a radius of 750 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 17th December 2025, was 3, How Field, Harpenden, AL5 3AU, a freehold house which sold for £1,150,000.

Read more about house prices in AL5.

• Sold Dec 2025£1,150,000 | 4 Bed House3, How Field, Harpenden, AL5 3AU3, How Field, Harpenden, AL5 3AU
• Sold Nov 2025£1,095,000 | 4 Bed House44, Park Mount, Harpenden, AL5 3AR44, Park Mount, Harpenden, AL5 3AR
• Sold Oct 2025£1,290,000 | 4 Bed House12, Lambourn Gardens, Harpenden, AL5 4DQ12, Lambourn Gardens, Harpenden, AL5 4DQ
• Sold Sep 2025£1,160,000 | 4 Bed House4, Park Mount, Harpenden, AL5 3AR4, Park Mount, Harpenden, AL5 3AR
• Sold Mar 2025£1,020,000 | 4 Bed House10, Park Mount, Harpenden, AL5 3AR10, Park Mount, Harpenden, AL5 3AR
• Sold Jan 2025£1,150,000 | 4 Bed House16, Broadfields, Harpenden, AL5 2HJ16, Broadfields, Harpenden, AL5 2HJ
• Sold Oct 2024£1,225,000 | 4 Bed House11, Roundwood Gardens, Harpenden, AL5 3AJ11, Roundwood Gardens, Harpenden, AL5 3AJ
• Sold Mar 2024£1,287,500 | 4 Bed House49, Hillside Road, Harpenden, AL5 4BS49, Hillside Road, Harpenden, AL5 4BS
• Sold Mar 2024£1,050,000 | 4 Bed House15, Hillside Road, Harpenden, AL5 4BS15, Hillside Road, Harpenden, AL5 4BS
• Sold Feb 2024£1,160,000 | 4 Bed House4, Park Rise, Harpenden, AL5 3AH4, Park Rise, Harpenden, AL5 3AH
• Sold Oct 2023£875,000 | 4 Bed House75, Luton Road, Harpenden, AL5 3BA75, Luton Road, Harpenden, AL5 3BA
• Sold Jun 2023£1,310,000 | 4 Bed House33, Hillside Road, Harpenden, AL5 4BS33, Hillside Road, Harpenden, AL5 4BS
• Sold Dec 2022£1,515,000 | 4 Bed House39, Moreton End Lane, Harpenden, AL5 2HA39, Moreton End Lane, Harpenden, AL5 2HA
• Sold Sep 2022£1,250,000 | 4 Bed House5, Otterton Close, Harpenden, AL5 3BE5, Otterton Close, Harpenden, AL5 3BE
• Sold Aug 2022£1,291,101 | 4 Bed House20, Park Rise, Harpenden, AL5 3AL20, Park Rise, Harpenden, AL5 3AL
• Sold Dec 2021£1,135,000 | 4 Bed House22, Park Mount, Harpenden, AL5 3AR22, Park Mount, Harpenden, AL5 3AR
• Sold Oct 2021£1,150,000 | 4 Bed House38, Park Mount, Harpenden, AL5 3AR38, Park Mount, Harpenden, AL5 3AR
• Sold Apr 2019£800,000 | 4 Bed House50, Park Mount, Harpenden, AL5 3AR50, Park Mount, Harpenden, AL5 3AR
• Sold Aug 2018£1,100,000 | 4 Bed House28, Park Rise, Harpenden, AL5 3AL28, Park Rise, Harpenden, AL5 3AL
• Sold Dec 2017£937,000 | 4 Bed House28A, Park Hill, Harpenden, AL5 3AT28A, Park Hill, Harpenden, AL5 3AT

Of the 13 addresses on Otterton Close, Harpenden, AL5, 4, Otterton Close, Harpenden comes out as the 6th largest and the 2nd most expensive in our analysis of the public data.

It is also £229k more expensive than the average property across the AL5 district.

• Roundwood Primary School

  500 m away
• Wood End School

  900 m away
• St Nicholas CofE VA Primary School

  1.0 km away

• Roundwood Park School

  500 m away
• St George's School

  1.0 km away
• Sir John Lawes School

  1.6 km away

• Harpenden

  |

  1.5 km away
• Luton Airport Parkway

  |

  5.8 km away
• Luton

  |

  7.2 km away

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