45 Stag Green Avenue Hatfield AL9 5EB

1. 16 Jul 2021

   Received by Welwyn Hatfield

2. 6 Sep 2021

   Decision issued: Granted

3. 31 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

• 43 Stag Green Avenue Hatfield AL9 5EB

  6/2021/1774/HOUSE Submitted 7 Jun 2021 16m away

  Erection of a single storey front extension

  Granted Householder Extension
  Small domestic

• 13 Lodge Drive Hatfield AL9 5HL

  6/2026/1258/HOUSE Submitted 17 Jul 2026 83m away

  83% historically approved · decision due ~14 Sep

  Erection of two-storey front, side and rear extensions and a a single storey rear extension following the demolition of the attached garage, conservatory, single storey rear extension and front canopy. Alteration to fenestration and external materials.

  Awaiting decision Householder Extension Demolition +1
  Small domestic

• 13 Lodge Drive Hatfield AL9 5HL

  6/2026/0640/HOUSE Submitted 10 Apr 2026 83m away

  Erection of a two-storey front and side extensions, part single and part two storey rear extension, alterations to fenestration and external materials

  Refused Householder Extension Windows or glazing
  Domestic

• 7 Pleasant Rise Hatfield AL9 5DR

  6/2026/1428/HOUSE Submitted 13 Aug 2026 106m away

  83% historically approved · decision due ~8 Oct

  Erection of single storey rear garage extension

  Awaiting decision Householder Extension
  Small domestic

• 29 Stag Green Avenue Hatfield AL9 5EB

  6/2023/0359/LAWP Submitted 16 Feb 2023 114m away

  Certificate of Lawful Development for a proposed first floor dormer extension with juliet balcony

  Granted Lawful development Extension Loft or dormer

• 29 Stag Green Avenue Hatfield Hertfordshire AL9 5EB

  6/2023/0358/HOUSE Submitted 15 Feb 2023 114m away

  Erection of rear infill extension with alterations to openings, first floor rear extension with insertion of rooflight to existing roof and front infill kitchen extension, under existing canopy

  Granted Householder Extension 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