12 Fern Dells Hatfield AL10 9HX

1. 15 Jul 2021

   Received by Welwyn Hatfield

2. 19 Aug 2021

   Decision issued: Granted

3. 15 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.

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

• 20 Roe Green Close Hatfield AL10 9PE

  6/2019/2646/LAWP Submitted 21 Oct 2019 86m away

  Certificate of lawfulness for the erection of a single storey side, single and two storey rear extensions and installation of rear roof light following demolition of existing conservatory and rear extension

  Withdrawn Lawful development Extension Loft or dormer +1
  Small domestic

• 61 Roe Green Close Hatfield AL10 9PF

  6/2024/1910/HOUSE Submitted 4 Oct 2024 165m away

  Erection of single storey side and two storey rear extensions

  Granted Householder Extension
  Small domestic

• 51 Roe Green Close Hatfield AL10 9PF

  6/2021/1178/HOUSE Submitted 12 Apr 2021 178m away

  Erection of a two storey side to rear extension

  Granted Householder Extension
  Domestic

• 51 Roe Green Close Hatfield AL10 9PF

  6/2025/1887/FULL Submitted 3 Sep 2025 178m away

  Erection of a two storey rear and side extension

  Granted Full applications Extension

• 53 Flat 1 Roe Green Close Hatfield AL10 9PF

  6/2024/1201/LAWE Submitted 27 Jun 2024 181m away

  Certificate of lawfulness for the existing use of ground floor as 4 separate self-contained residential units

  Granted Lawful development

• 76 College Lane Hatfield AL10 9PQ

  6/2021/0544/HOUSE Submitted 19 Feb 2021 190m away

  Change of external appearance to dwelling from brickwork to render and retention of pitched garage roof

  Granted Householder
  Domestic

• 6/2026/0735/LAWE Refused

  1 Northaw Place Coopers Lane Northaw Potters Bar EN6 4NQ

  Certificate of lawfulness for the existing use of the land as residential garden land ancillary to the dwellinghouse continuously since 2012

  27 Apr 2026 Lawful development
• 6/2026/1132/LAWE Refused

  19 Cunningham Avenue Hatfield AL10 9LR

  Certificate of existing lawfulness of a 5 person HMO since 6 April 2006

  30 Jun 2026 Lawful development
• 6/2026/1506/LAWP Awaiting decision

  Gosmore Brocket Road Welwyn Garden City AL8 7TT

  Erection of single storey side extensions x 2 and two storey rear extension

  27 Aug 2026 Lawful development
• 6/2026/1503/LAWE Awaiting decision

  27 Batterdale Hatfield AL9 5JG

  Certificate of lawfulness for the existing like-for-like replacement of damaged and aged windows on the front and rear elevations

  26 Aug 2026 Lawful development
• 6/2026/1044/LAWP Granted

  5 Peartree Court Welwyn Garden City AL7 3XN

  Certificate of lawfulness for the change of use from C3 (dwellinghouse) to C4 (HMO for up to 6 unrelated residents)

  15 Jun 2026 Lawful development