16 Selwyn Avenue Hatfield AL10 9NP

1. 26 Apr 2021

   Received by Welwyn Hatfield

2. 22 Jun 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

• 24 Selwyn Avenue Hatfield AL10 9NP

  6/2024/1406/HOUSE Submitted 24 Jul 2024 50m away

  Erection of two storey side and rear extension and single storey rear extension

  Granted Householder Extension
  Small domestic

• 13 Selwyn Avenue Hatfield AL10 9NR

  6/2021/1921/LAWP Submitted 24 Jun 2021 54m away

  Certificate of lawfulness for the erection of a two storey rear extension, alterations to openings on front and both side elevations, with additional roof lights to existing roof to rear and garage conversion

  Refused Lawful development Extension Loft or dormer

• 22 Selwyn Drive Hatfield AL10 9NJ

  6/2021/0949/HOUSE Submitted 22 Mar 2021 144m away

  Retention of single storey outbuilding

  Granted Householder
  Small domestic

• 13 Ellenbrook Crescent Hatfield AL10 9RP

  6/2021/1082/HOUSE Submitted 1 Apr 2021 174m away

  Conversion of the garage into a bedroom, erection of a rear extension, insertion of downstairs bathroom

  Granted Householder Extension
  Domestic

• 10 Ellenbrook Crescent Hatfield AL10 9RP

  6/2024/2073/LAWP Submitted 28 Oct 2024 186m away

  Certificate of lawfulness for a hip to gable loft conversion with rear dormer

  Granted Lawful development Loft or dormer

• 9 Ellenbrook Crescent Hatfield AL10 9RP

  6/2023/0308/PN8 Submitted 8 Feb 2023 189m away

  Prior approval for the erection of a single storey rear extension measuring 4.5m in depth, 3.5m in height, 2.25m to the eaves

  Refused 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