40 Great North Road Welwyn Garden City AL8 7TJ

1. 14 Apr 2021

   Received by Welwyn Hatfield

2. 2 Jul 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

• 41 Great North Road Welwyn Garden City AL8 7TJ

  6/2026/0900/LAWP Submitted 20 May 2026 11m away

  Certificate of lawfulness for the erection of a hip to gable roof extension, formation of rear dormer, erection of single storey side extension and insertion of rooflight to front elevation

  Refused Lawful development Extension Loft or dormer
  Small domestic

• 41 Great North Road Welwyn Garden City AL8 7TJ

  6/2026/1328/LAWP Submitted 29 Jul 2026 11m away

  81% historically approved · decision due ~24 Sep

  Certificate of lawfulness for a proposed hip to gable loft conversion with rear facing dormer and single storey side extension, plus insertion of rooflight to front elevation

  Awaiting decision Lawful development Extension Loft or dormer
  Small domestic

• Verge in highway on Great North Road Welwyn Garden City AL8 7TJ

  6/2026/0698/COND Submitted 20 Apr 2026 61m away

  Submission of details pursuant to Condition 1 (Construction Traffic Management Plan) on planning permission 6/2025/1893/FULL

  Refused Conditions

• 2 New Road Welwyn Garden City AL8 7TX

  6/2019/2568/COND Submitted 14 Oct 2019 124m away

  Submission of details pursuant to condition 4 (Site Characterisation, Submission and Implementation of Remediation Scheme, Unexpected Contamination and Monitoring and Maintenance) on planning permission 6/2015/1983/FULL

  Decided Conditions

• 2 New Road Welwyn Garden City AL8 7TX

  6/2019/2588/COND Submitted 15 Oct 2019 130m away

  Submission of details pursuant to condition 4 (remediation) on planning permission 6/2015/1984/FULL

  Decided Conditions

• 28 Great North Road Welwyn Garden City AL8 7TJ

  6/2021/1019/HOUSE Submitted 26 Mar 2021 140m away

  Two new dormers on the roof and external elevational treatments

  Withdrawn Householder Loft or dormer
  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