HM Land Registry records the plot of land for 21, Parkside, Welwyn as measuring 303 m².

That makes it the 18th largest plot in the postcode, where all 40 other houses have recorded plot data.

21, Parkside, Welwyn has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 27 Nov 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 21, Parkside, Welwyn completed on 24th August 2009 at £348,950 and was recorded by HM Land Registry as a freehold house.

Since 1995 this is the property's only sale.

Values of comparable properties have risen by 96.1% over the period since August 2009.

• Sold Aug 2009£348,950

Since 2013 136 properties similar to 21, Parkside, Welwyn have sold within a radius of 1.2 kilometres, per the Land Registry and our network of Estate Agents.

The latest, on the 30th April 2026, was 35, Parkside, Welwyn, AL6 9DQ, a freehold house which sold for £800,000.

Read more about house prices in AL6.

• Sold Apr 2026£800,000 | 4 Bed House35, Parkside, Welwyn, AL6 9DQ35, Parkside, Welwyn, AL6 9DQ
• Sold Mar 2025£775,000 | 4 Bed House17, Wendover Drive, Welwyn, AL6 9LT17, Wendover Drive, Welwyn, AL6 9LT
• Sold Feb 2025£755,000 | 4 Bed House16, School Lane, Welwyn, AL6 9PH16, School Lane, Welwyn, AL6 9PH
• Sold Nov 2024£725,000 | 4 Bed House28, Welwyn Hall Gardens, Welwyn, AL6 9LF28, Welwyn Hall Gardens, Welwyn, AL6 9LF
• Sold Oct 2024£690,000 | 4 Bed House24, Mill Lane, Welwyn, AL6 9ET24, Mill Lane, Welwyn, AL6 9ET
• Sold Oct 2024£750,000 | 4 Bed House16A, School Lane, Welwyn, AL6 9PH16A, School Lane, Welwyn, AL6 9PH
• Sold Jul 2024£705,000 | 4 Bed House38, Welwyn Hall Gardens, Welwyn, AL6 9LF38, Welwyn Hall Gardens, Welwyn, AL6 9LF
• Sold Feb 2024£690,000 | 4 Bed House26, Parkside, Welwyn, AL6 9DQ26, Parkside, Welwyn, AL6 9DQ
• Sold Dec 2022£675,000 | 4 Bed House29, Welwyn Hall Gardens, Welwyn, AL6 9LF29, Welwyn Hall Gardens, Welwyn, AL6 9LF
• Sold Nov 2022£733,500 | 4 Bed House3, Mimram Place, Welwyn, AL6 9HQ3, Mimram Place, Welwyn, AL6 9HQ
• Sold Sep 2021£750,000 | 4 Bed House31, Parkside, Welwyn, AL6 9DQ31, Parkside, Welwyn, AL6 9DQ
• Sold Sep 2021£600,000 | 4 Bed House2, Dicket Mead, Welwyn, AL6 9NX2, Dicket Mead, Welwyn, AL6 9NX
• Sold Jun 2021£770,000 | 4 Bed House16, Wendover Drive, Welwyn, AL6 9LT16, Wendover Drive, Welwyn, AL6 9LT
• Sold Apr 2021£570,000 | 4 Bed House18, Welwyn Hall Gardens, Welwyn, AL6 9LF18, Welwyn Hall Gardens, Welwyn, AL6 9LF
• Sold Jul 2020£819,950 | 4 Bed House7, Roman Way, Welwyn, AL6 9RJ7, Roman Way, Welwyn, AL6 9RJ
• Sold Mar 2020£687,500 | 4 Bed House29, Parkside, Welwyn, AL6 9DQ29, Parkside, Welwyn, AL6 9DQ
• Sold Dec 2019£600,000 | 4 Bed House27, Welwyn Hall Gardens, Welwyn, AL6 9LF27, Welwyn Hall Gardens, Welwyn, AL6 9LF
• Sold Jun 2018£750,000 | 4 Bed House8, Wendover Drive, Welwyn, AL6 9LT8, Wendover Drive, Welwyn, AL6 9LT
• Sold Sep 2016£610,000 | 4 Bed House33, Parkside, Welwyn, AL6 9DQ33, Parkside, Welwyn, AL6 9DQ
• Sold Dec 2013£490,000 | 4 Bed House12, Welwyn Hall Gardens, Welwyn, AL6 9LF12, Welwyn Hall Gardens, Welwyn, AL6 9LF

Over the past 2 years our Estate Agent network has recorded 1 let within 1.2 kilometres of 21, Parkside, Welwyn.

The latest, in November 2023, was 5, Wilga Road, Welwyn, AL6 9PT, a freehold house let by Collinson Hall.

• 
  Let agreed Nov 2023£ Undisclosed | 3 Bed House5, Wilga Road, Welwyn, AL6 9PT5, Wilga Road, Welwyn, AL6 9PT

•Nearby is defined as the radius comprising the nearest 2,000 addresses.

Of the 48 addresses on Parkside, Welwyn, AL6, 21, Parkside, Welwyn comes out as the 11th largest and the 8th most expensive in our analysis of the public data.

It is also £41k less expensive than the average property across the AL6 district.

• Welwyn St Mary's Church of England Voluntary Aided Primary School

  500 m away
• Homerswood Primary and Nursery School

  1.5 km away
• Oaklands Primary School

  1.7 km away

• Monk's Walk School

  1.1 km away
• Ridgeway Academy

  3.8 km away
• Stanborough School

  4.4 km away

• Welwyn North

  |

  1.5 km away
• Welwyn Garden City

  |

  3.2 km away
• Knebworth

  |

  4.5 km away

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