41 Mardley Hill Welwyn AL6 0TT

1. 24 Apr 2024

   Received by Welwyn Hatfield

2. 6 Oct 2024

   Validated

   Checked as complete and ready for consideration.

3. 10 Dec 2024

   Decision issued: Granted

4. 22 Aug 2026

   Added to PlanIndex

Welwyn Hatfield granted permission on 10 December 2024, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

• 35 Mardley Hill Welwyn AL6 0TT

  6/2021/1099/HOUSE Submitted 6 Apr 2021 50 yards away

  Replacement garage

  Granted Householder
  Domestic

• 47 Mardley Hill Welwyn AL6 0TT

  6/2021/1697/TPO Submitted 27 May 2021 50 yards away

  T1 - Sweet Chestnut repollard back to previous points gaining some control and access of light. T2 - Overall reduce and shape all round by approx 25%. T3 - T6 Are all neighbours trees. Looking to cut all trees back to boundary line T3 - Oak Tree to cut tree back to boundary line. T4 - T5 Lime Trees to cut trees back to boundary line. T6 - Pine Tree to shorten just a couple of limbs back a couple of meters.

  Granted Trees

• 16 Mardley Hill Welwyn AL6 0TN

  6/2026/1108/TPO Submitted 26 Jun 2026 50 yards away

  T1 - 1 x Oak to reduce by approximately 2m height and width, ensuring to cut back clearing the house sufficiently. Oak reducing due to canopy in close proximity to property and roof. (Covered by TPO 24 A3)

  Granted Trees

• 18 Mardley Hill Welwyn AL6 0TN

  6/2021/2075/HOUSE Submitted 9 Jul 2021 50 yards away

  First floor side extension (revised)

  Granted Householder Extension
  Domestic

• 16 Mardley Hill Welwyn AL6 0TN

  6/2021/0944/TPO Submitted 23 Mar 2021 50 yards away

  T1 - Beech 5-6m crown reduction T2 - Beech 5-6m crown reduction

  Granted Trees

• 12 Mardley Hill Welwyn AL6 0TN

  6/2021/0943/TPO Submitted 23 Mar 2021 50 yards away

  T1 - re-pollard 3-4m T2 - fell Beech tree to ground level T3 - oak tree 3-4m crown reduction T4 - Beech tree 5-6m crown reduction

  Refused Trees

• 6/2026/1052/FULL Granted

  Unit 3 Woodside Lane Hatfield AL9 6DE

  Retention of an extension to the existing building and the erection of a rear extension following demolition of existing buildings (part retrospective)

  Received 17 Jun, published by the council 24 Jul 2026 Full applications
• 6/2026/1264/FULL Granted

  53 Brookmans Avenue Brookmans Park AL9 7QG

  Erection of dwelling with boundary wall and gates following demolition of existing property

  Received 17 Jul, published by the council 15 Aug 2026 Full applications
• 6/2026/1337/FULL Granted

  Royal Veterinary College Hawkshead Lane North Mymms AL9 7TA

  Relocation of the Transfusion Medicine Vet Pod and associated parking, landscaping and associated works

  Received 30 Jul, published by the council 9 Aug 2026 Full applications
• 6/2026/1689/MAJ Awaiting decision

  Howlands House Howlands Welwyn Garden City AL7 4QJ

  Erection of a single 3 and 4-storey building comprising 44 temporary accommodation homes, staff office and laundry facilities, children's play space, cycle and vehicular parking, associated servicing, plant enclosure, substation, landscaping and external works.

  Received 25 Sep, published by the council 1 Oct 2026 Full applications
• 6/2026/0952/FULL Granted

  18 Fallowfield Welwyn Garden City AL7 1EE

  Retrospective application for change of use from amenity land to residential land to form part hardstanding and part garden land at the front of the property and installation of a drop kerb

  Received 1 Jun, published by the council 24 Jul 2026 Full applications