175 Blythway Welwyn Garden City AL7 1DS

1. 13 Aug 2024

   Received by Welwyn Hatfield

2. 22 Aug 2024

   Validated

   Checked as complete and ready for consideration.

3. 17 Oct 2024

   Decision issued: Granted

4. 9 Aug 2026

   Added to PlanIndex

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

• 175 Blythway Welwyn Garden City AL7 1DS

  6/2026/0854/EM Submitted 14 May 2026 10m away

  Replace the existing front boundary hedge with a new, well-maintained evergreen hedge to improve the appearance of the property and enhance biodiversity within the street scene.

  Granted

• 176 Blythway Welwyn Garden City AL7 1DU

  6/2023/0076/HOUSE Submitted 12 Jan 2023 38m away

  Erection of first floor side extension

  Granted Householder Extension
  Domestic

• 176 Blythway Welwyn Garden City AL7 1DU

  6/2023/0059/EM Submitted 10 Jan 2023 38m away

  Erection of a first floor side extension

  Granted Extension

• 10 The Swallows Welwyn Garden City AL7 1BY

  6/2021/1253/HOUSE Submitted 19 Apr 2021 54m away

  Erection of single storey rear extension

  Granted Householder Extension
  Small domestic

• 187 Blythway Welwyn Garden City AL7 1DS

  6/2026/0432/EM Submitted 9 Mar 2026 60m away

  Erection of outbuilding for home office/ gym following demolition of existing shed/outbuilding

  Granted Demolition
  Small domestic

• 187 Blythway Welwyn Garden City AL7 1DS

  6/2026/0457/HOUSE Submitted 12 Mar 2026 63m away

  Erection of home office/gym following the demolition of existing shed outbuildings

  Granted Householder Demolition
  Small domestic

• 6/2026/0735/LAWE Refused

  1 Northaw Place Coopers Lane Northaw Potters Bar EN6 4NQ

  Certificate of lawfulness for the existing use of the land as residential garden land ancillary to the dwellinghouse continuously since 2012

  27 Apr 2026 Lawful development
• 6/2026/1132/LAWE Refused

  19 Cunningham Avenue Hatfield AL10 9LR

  Certificate of existing lawfulness of a 5 person HMO since 6 April 2006

  30 Jun 2026 Lawful development
• 6/2026/1506/LAWP Awaiting decision

  Gosmore Brocket Road Welwyn Garden City AL8 7TT

  Erection of single storey side extensions x 2 and two storey rear extension

  27 Aug 2026 Lawful development
• 6/2026/1503/LAWE Awaiting decision

  27 Batterdale Hatfield AL9 5JG

  Certificate of lawfulness for the existing like-for-like replacement of damaged and aged windows on the front and rear elevations

  26 Aug 2026 Lawful development
• 6/2026/1044/LAWP Granted

  5 Peartree Court Welwyn Garden City AL7 3XN

  Certificate of lawfulness for the change of use from C3 (dwellinghouse) to C4 (HMO for up to 6 unrelated residents)

  15 Jun 2026 Lawful development