4 Holly Road Woolmer Green SG3 6LL

1. 29 Mar 2021

   Received by Welwyn Hatfield

2. 31 Mar 2021

   Validated

   Checked as complete and ready for consideration.

3. 7 Jun 2021

   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.

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

• 2 Mardleybury Court Woolmer Green Knebworth SG3 6LP

  6/2019/2855/COND Submitted 12 Nov 2019 114m away

  Submission of details pursuant to condition 6 (arboricultural method statement) on planning permission 6/2019/0909/FULL

  Granted Conditions

• 16 Oak Road Woolmer Green SG3 6LS

  6/2026/1459/HOUSE Submitted 19 Aug 2026 148m away

  83% historically approved · decision due ~14 Oct

  Erection of annexe

  Awaiting decision Householder
  Domestic

• 16 Oak Road Woolmer Green SG3 6LS

  6/2026/1472/HOUSE Submitted 20 Aug 2026 148m away

  83% historically approved · decision due ~16 Oct

  Erection of part single, part two storey rear extension, new windows and doors to existing side and rear elevations and installation of rooflight within the rear roofslope

  Awaiting decision Householder Extension Loft or dormer +1
  Domestic

• 10 London Road Woolmer Green SG3 6JP

  6/2021/1932/LB Submitted 25 Jun 2021 179m away

  Erection of rear extension and glazed link extension. Conversion of existing garage into habitable accommodation and internal ground floor alterations

  Refused Heritage and listed buildings Extension Windows or glazing

• 10 London Road Woolmer Green SG3 6JP

  6/2021/1931/HOUSE Submitted 25 Jun 2021 179m away

  Erection of rear extension and glazed link extension. Conversion of existing garage into habitable accommodation and internal ground floor alterations

  Refused Householder Extension Windows or glazing
  Domestic

• 9A London Road Knebworth SG3 6LG

  6/2021/1374/HOUSE Submitted 29 Apr 2021 186m away

  Erection of a single storey rear extension to facilitate dining room.

  Granted Householder 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