40 Dellsome Lane Welham Green Hatfield AL9 7ND

1. 16 Jul 2026

   Received by Welwyn Hatfield

2. 17 Jul 2026

   Validated

   Checked as complete and ready for consideration.

3. 9 Aug 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 11 September 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Welwyn Hatfield took a median of 58 days over the applications it decided in the last year.

This application is with Welwyn Hatfield for determination, against a statutory target of eight weeks. Over the last year Welwyn Hatfield decided lawful development applications in a median of 58 days. More in our guide to how long planning decisions take.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 6 Parsonage Lane Welham Green Hatfield AL9 7LU

  6/2021/1778/HOUSE Submitted 8 Jun 2021 41m away

  Erection of a two storey side and rear extension, demolition of garage and alterations to fenestration

  Granted Householder Extension Demolition +1
  Domestic

• 2 Parsonage Lane Welham Green Hatfield AL9 7LU

  6/2026/0989/LAWP Submitted 4 Jun 2026 42m away

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

  Granted Lawful development Extension
  Small domestic

• 95 Dellsome Lane Welham Green Hatfield AL9 7NE

  6/2021/1441/LAWP Submitted 7 May 2021 46m away

  Certificate of lawfulness for proposed loft conversion, including three rooflights and one window on the rear dormer.

  Granted Lawful development Loft or dormer Windows or glazing

• 54 Dellsome Lane Welham Green Hatfield AL9 7ND

  6/2021/0897/HOUSE Submitted 19 Mar 2021 55m away

  Erection of an outbuilding at the end of rear garden

  Granted Householder
  Small domestic

• 6 Huggins Lane Welham Green Hatfield AL9 7LR

  6/2026/1203/HOUSE Submitted 8 Jul 2026 65m away

  83% historically approved · decision due ~22 Sep

  Erection of a two storey side extension.

  Awaiting decision Householder Extension
  Domestic

• 9 Huggins Lane Welham Green Hatfield AL9 7LT

  6/2021/1548/PN8 Submitted 14 May 2021 94m away

  Prior approval for the erection of a single storey rear extension measuring 5m in depth, 3.2m in height and 3m to the eaves.

  Decided Prior approval Extension
  Small 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