9A London Road Knebworth SG3 6LG

1. 29 Apr 2021

   Received by Welwyn Hatfield

2. 4 May 2021

   Validated

   Checked as complete and ready for consideration.

3. 29 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

• 18A London Road Woolmer Green SG3 6JP

  6/2022/2658/HOUSE Submitted 22 Nov 2022 73m away

  Erection of first floor side extension, single story rear extension and conversion of car port into habitable space

  Refused Householder Extension
  Domestic

• 2 Mardleybury Court Woolmer Green Knebworth SG3 6LP

  6/2019/2855/COND Submitted 12 Nov 2019 75m away

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

  Granted Conditions

• 22B London Road Woolmer Green SG3 6JP

  6/2024/1996/PN33 Submitted 16 Oct 2024 82m away

  Change of use from commercial, business and service (Use Class E) to dwellinghouse (Use Class C3) to form one dwelling

  Granted
  Domestic

• 9 New Road Woolmer Green SG3 6JX

  6/2022/2860/HOUSE Submitted 19 Dec 2022 89m away

  Erection of single storey rear infill extension with roof lantern, raised patio and replacement of existing windows following the demolition of an existing conservatory

  Granted Householder Extension Demolition +1
  Small domestic

• 4 Evergreen Close Woolmer Green SG3 6JN

  6/2026/1391/TPO Submitted 6 Aug 2026 139m away

  98% historically approved · decision due ~1 Oct

  Crown reduction of a Silver Birch tree by up to 20% (approximately 2 - 3 metres) to reduce branch spread and weight. Work is required to manage size, prevent encroachment and maintain tree health Reduce overhanging branches by approximately 2 metres to prevent encroachment over the driveway and reduce pigeon fouling on vehicles The tree is close to the house and has grown too large for the garden so the works are required to manage its size and maintain its health TPO 105 T3

  Awaiting decision Trees

• 50 Carvers Croft Woolmer Green Hertfordshire SG3 6LX

  6/2023/0296/LAWP Submitted 7 Feb 2023 149m away

  Certificate of lawfulness for the erection of a single storey rear extension

  Granted Lawful development 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