Mansion House North Mymms Park Tollgate Road North Mymms Hatfield AL9 7TR

1. 16 Jul 2026

   Received by Welwyn Hatfield

2. 28 Jul 2026

   Validated

   Checked as complete and ready for consideration.

3. 15 Aug 2026

   Added to PlanIndex

Welwyn Hatfield refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. 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.

• North Mymms Park Tollgate Road North Mymms Hatfield AL9 7TR

  6/2026/1248/LAWE Submitted 15 Jul 2026 50 yards away

  75% historically approved · decision due ~9 Sep

  Certificate of lawfulness of existing use as a wedding venue, conference, ceremonies, corporate events and filming

  Awaiting decision Lawful development

• North Mymms Park Tollgate Road North Mymms AL9 7TR

  6/2026/0708/VAR Submitted 21 Apr 2026 100 yards away

  91% historically approved · decision due ~6 Jul

  Variation or removal of Condition 2 (noise limiting system) and removal of Condition 3 (overarching Travel Plan) of planning permission 6/2022/2793/VAR

  Awaiting decision Amendments 1 doc

• 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