European Knowledge Centre Eisai Manufacturing Mosquito Way Hatfield AL10 9SN

1. 5 Jul 2021

   Received by Welwyn Hatfield

2. 4 Aug 2021

   Validated

   Checked as complete and ready for consideration.

3. 6 Oct 2021

   Decision issued: Granted

4. 1 Oct 2026

   Added to PlanIndex

Welwyn Hatfield granted permission on 6 October 2021, 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.

• European Knowledge Centre Eisai Limited Mosquito Way Hatfield AL10 9SN

  6/2026/0321/COND Submitted 20 Feb 2026 100 yards away

  Submission of details pursuant to Conditions 1 (Construction Management Plan), 2 (Surface Water Drainage), 7 (Planting Methods and Soft Landscaping) and Condition 8 (Cycle Shelter and Cycle Provision) on planning permission 6/2022/1853/MAJ

  Granted Conditions

• Hertfordshire Constabulary Central Area Headquarters And Hatfield Police Station Comet Way Hatfield AL10 9SJ

  6/2023/0330/TPO Submitted 10 Feb 2023 200 yards away

  T9-T10 Willow x 2. Re pollard back to historic points. Trees covered by TPO 701 (2017)

  Granted Trees

• Hertfordshire Constabulary Central Area Headquarters And Hatfield Police Station Comet Way Hatfield AL10 9SJ

  6/2026/0617/TPO Submitted 8 Apr 2026 200 yards away

  T9 Weeping willow to remove limb with large hollow at approximately 2m SE side. T10 Weeping willow to remove large central limb growing towards police station. Covered by TPO 701 (2017)

  Granted Trees

• The Hub Tamblin Way Hatfield AL10 9EZ

  6/2026/1086/PN24 Submitted 23 Jun 2026 200 yards away

  Prior approval for installation of a roof-mounted solar PV system, comprising of 212 Solarwatt panels to a total system size of 95.4 kWp

  Refused Prior approval

• Hatfield Police Station Comet Way Hatfield AL10 9SJ

  6/2026/0285/LB Submitted 19 Feb 2026 200 yards away

  Installation of various illuminated signage and logos mounted on standalone totems and building façade

  Granted Heritage and listed buildings 1 doc

• The Hub Tamblin Way Hatfield AL10 9EZ

  6/2024/2108/LAWP Submitted 31 Oct 2024 200 yards away

  Certificate of lawfulness for the installation of a new perimeter fence around the north-western and south-western boundaries of the existing Affinity Water Limited (AWL) site

  Granted Lawful development
  Small domestic

• 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