HM Land Registry records the plot of land for 4, St. Johns Close, Welwyn as measuring 911 m².

That makes it the 8th largest plot in the postcode, where all 16 other houses have recorded plot data.

4, St. Johns Close, Welwyn has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 08 Jun 2012.

The property is not 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, St. Johns Close, Welwyn completed on 29th July 2008 at £460,000 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 91.9% over the period since July 2008.

• Sold Jul 2008£460,000

Since 2015 83 properties similar to 4, St. Johns Close, Welwyn have sold within a radius of 1.2 kilometres, per the Land Registry and our network of Estate Agents.

The latest, on the 12th January 2026, was 6, North Ride, Welwyn, AL6 9RD, a freehold house which sold for £1,075,000.

Read more about house prices in AL6.

• Sold Jan 2026£1,075,000 | 5 Bed House6, North Ride, Welwyn, AL6 9RD6, North Ride, Welwyn, AL6 9RD
• Sold Oct 2025£900,000 | 5 Bed House12, Roman Way, Welwyn, AL6 9RJ12, Roman Way, Welwyn, AL6 9RJ
• Sold Jun 2024£997,500 | 5 Bed House31, Blakes Way, Welwyn, AL6 9RE31, Blakes Way, Welwyn, AL6 9RE
• Sold Oct 2023£995,000 | 5 Bed House5, Dewars Close, Welwyn, AL6 9RR5, Dewars Close, Welwyn, AL6 9RR
• Sold Oct 2023£947,500 | 5 Bed House16, Blakes Way, Welwyn, AL6 9RE16, Blakes Way, Welwyn, AL6 9RE
• Sold Aug 2023£940,000 | 4 Bed House4, Hensley Close, Welwyn, AL6 9QD4, Hensley Close, Welwyn, AL6 9QD
• Sold May 2023£1,025,000 | 4 Bed House7A, Wendover Drive, Welwyn, AL6 9LT7A, Wendover Drive, Welwyn, AL6 9LT
• Sold Nov 2022£1,020,000 | 4 Bed House7, Wendover Drive, Welwyn, AL6 9LT7, Wendover Drive, Welwyn, AL6 9LT
• Sold May 2021£816,000 | 4 Bed House15, St. Johns Close, Welwyn, AL6 9RB15, St. Johns Close, Welwyn, AL6 9RB
• Sold Mar 2021£950,000 | 4 Bed House4A, Wendover Drive, Welwyn, AL6 9LT4A, Wendover Drive, Welwyn, AL6 9LT
• Sold Mar 2021£872,500 | 4 Bed House9, Codicote Road, Welwyn, AL6 9ND9, Codicote Road, Welwyn, AL6 9ND
• Sold Feb 2021£840,000 | 5 Bed House27, Blakes Way, Welwyn, AL6 9RE27, Blakes Way, Welwyn, AL6 9RE
• Sold Feb 2021£898,000 | 4 Bed House11A, St. Johns Close, Welwyn, AL6 9RB11A, St. Johns Close, Welwyn, AL6 9RB
• Sold Sep 2020£795,000 | 4 Bed House7, St. Johns Close, Welwyn, AL6 9RB7, St. Johns Close, Welwyn, AL6 9RB
• Sold Aug 2019£825,000 | 5 Bed House2, North Ride, Welwyn, AL6 9RD2, North Ride, Welwyn, AL6 9RD
• Sold Sep 2018£830,000 | 5 Bed House5, Cylers Thicket, Welwyn, AL6 9RS5, Cylers Thicket, Welwyn, AL6 9RS
• Sold Aug 2017£859,995 | 5 Bed House4, Cylers Thicket, Welwyn, AL6 9RS4, Cylers Thicket, Welwyn, AL6 9RS
• Sold Aug 2017£770,000 | 5 Bed House14, Blakes Way, Welwyn, AL6 9RE14, Blakes Way, Welwyn, AL6 9RE
• Sold Dec 2015£720,000 | 4 Bed House4, Wendover Drive, Welwyn, AL6 9LT4, Wendover Drive, Welwyn, AL6 9LT
• Sold Nov 2015£650,000 | 4 Bed House1, Carleton Rise, Welwyn, AL6 9RP1, Carleton Rise, Welwyn, AL6 9RP

Over the past 2 years our Estate Agent network has recorded 1 let within 1.2 kilometres of 4, St. Johns Close, 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 16 addresses on St. Johns Close, Welwyn, AL6, 4, St. Johns Close, Welwyn comes out as the largest and the most expensive in our analysis of the public data.

It is also £187k more expensive than the average property across the AL6 district.

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

  1.1 km away
• Oaklands Primary School

  1.2 km away
• Homerswood Primary and Nursery School

  2.1 km away

• Monk's Walk School

  1.7 km away
• Ridgeway Academy

  4.3 km away
• Stanborough School

  5.0 km away

• Welwyn North

  |

  1.8 km away
• Welwyn Garden City

  |

  3.8 km away
• Knebworth

  |

  3.9 km away

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