213 Knella Road Welwyn Garden City AL7 3NT

1. 18 Jun 2021

   Received by Welwyn Hatfield

2. 13 Aug 2021

   Decision issued: Granted

3. 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.

Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.

More on householder applications in our guide

• 178 Knella Road Welwyn Garden City AL7 3NN

  6/2026/1316/HOUSE Submitted 27 Jul 2026 168m away

  83% historically approved · decision due ~22 Sep

  Erection of part single and part two storey rear extension with alterations to openings on rear elevation

  Awaiting decision Householder Extension
  Domestic

• Land To The West Of Ridgeway Road Ridgeway Welwyn Garden City AL7 2AA

  6/2026/1158/FULL Submitted 3 Jul 2026 209m away

  81% historically approved · decision due ~28 Aug

  Construction and operation of a micro energy storage project

  Awaiting decision Full applications

• 165 Knella Road Welwyn Garden City AL7 3NT

  6/2024/1545/PN8 Submitted 13 Aug 2024 233m away

  Prior approval for the erection of a single storey rear infill extension measuring 6.00m in depth, 3.69m in height and 2.46m to the eaves

  Granted Prior approval Extension
  Small domestic

• 265 Knella Road Welwyn Garden City AL7 3NS

  6/2023/0114/COND Submitted 17 Jan 2023 236m away

  Submission of details pursuant to condition 4 (Noise) on planning permission 6/2018/2611/FULL

  Granted Conditions

• 9 Longmore Gardens Welwyn Garden City AL7 3NH

  6/2021/1147/LAWP Submitted 8 Apr 2021 320m away

  Certificate of lawfulness for the windows and doors to be replaced with energy efficient products

  Refused Lawful development Windows or glazing

• 96 Salisbury Road Welwyn Garden City AL7 3SB

  6/2024/1793/PN8 Submitted 17 Sep 2024 331m away

  Prior Approval for the erection of a single storey rear extension measuring 5m in depth, 3.20m in height and 2.82m to the eaves

  Granted Prior approval Extension
  Small domestic

• 6/2026/1228/HOUSE Granted

  109 Mount Way Welwyn Garden City AL7 4LA

  Erection of single storey front extension

  13 Jul 2026 Householder
• 6/2026/1011/HOUSE Granted

  5 Brookside Crescent Cuffley Potters Bar EN6 4QW

  Erection of rear extension, single storey side extension, new porch, additions/alterations to windows on side elevation and demolition of garage

  9 Jun 2026 Householder
• 6/2026/0703/HOUSE Granted

  57 Great North Road Brookmans Park AL9 6LA

  Erection of part double part single storey rear extension, single storey front porch extension, raising of roof and eaves to accommodate loft conversion, alterations to materials and fenestration, erection of front boundary wall and gates

  20 Apr 2026 Householder
• 6/2026/0534/HOUSE Refused

  16 Chipmunk Chase Hatfield AL10 9GH

  Retention of single storey rear extension and garage conversion to study/office

  24 Mar 2026 Householder
• 6/2026/1175/HOUSE Granted

  5A Honeycroft Welwyn Garden City AL8 6HR

  Erection of a single storey rear extension, alterations to opening on side elevation and garden room with covered area following demolition of conservatory

  7 Jul 2026 Householder