73 Mymms Drive Brookmans Park AL9 7AA

This site has had 2 applications since 2026: 0 approved, 1 refused.

• 6/2026/0525/FULL Refused

  73 Mymms Drive Brookmans Park AL9 7AA

  Erection of a new dwelling following demolition of the existing building

  Decided 21 Aug 2026 Full applications

1. 7 Sep 2026

   Received by Welwyn Hatfield

2. 14 Sep 2026

   Validated

   Checked as complete and ready for consideration.

3. 22 Sep 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 9 November 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 full applications in a median of 102 days. More in our guide to how long planning decisions take.

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.

• 73 Mymms Drive Brookmans Park AL9 7AA

  6/2026/0525/FULL Submitted 23 Mar 2026 50 yards away

  Erection of a new dwelling following demolition of the existing building

  Refused Full applications New dwelling Demolition
  Domestic

• 9 Calder Avenue Brookmans Park Hatfield AL9 7AH

  6/2021/1064/HOUSE Submitted 31 Mar 2021 100 yards away

  Erection of part single, part two storey front extension; two storey side extension; part single, part two storey rear extension; garage conversion; enlargement of roof; insertion of side and rear rooflights; and front facade alterations.

  Granted Householder Extension Loft or dormer
  Small domestic

• 72 Mymms Drive Brookmans Park Hatfield AL9 7AD

  6/2021/2431/HOUSE Submitted 18 Aug 2021 100 yards away

  Erection of a two storey rear and single storey side extension with crown roof and rendering of the exterior

  Granted Householder Extension
  Small domestic

• 6 Calder Avenue Brookmans Park AL9 7AQ

  6/2021/1496/HOUSE Submitted 11 May 2021 150 yards away

  Erection of single storey side extension, garage, front canopy and first floor rear extension.

  Granted Householder Extension
  Small domestic

• 6 Calder Avenue Brookmans Park Hertfordshire AL9 7AQ

  6/2023/0273/HOUSE Submitted 3 Feb 2023 150 yards away

  Erection of a first floor rear extension, single storey side and rear extension, front canopy, alteration to fenestration, conversion of garage to habitable space and erection of a detached garage

  Granted Householder Extension Windows or glazing
  Small domestic

• Oakview 103 Brookmans Avenue Brookmans Park AL9 7QG

  6/2026/0641/TPO Submitted 10 Apr 2026 150 yards away

  T1 – Oak – height 15m – spread 12m – w3w aims.dime.into Requested works: 1m Reduction of entire tree, removing all deadwood. Reasons for works: Tree is in proximity to public footpath, used by local school children. Light and space is also obstructed to front of property TPO 972 (2022) T1

  Granted 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