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

4. Decision

   Awaiting decision

   Decision expected by 27 October 2026, 13 weeks from validation under the statutory target. 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. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.

More on full applications applications in our guide

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

  6/2026/1248/LAWE Submitted 15 Jul 2026 4m away

  81% 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 77m away

  90% 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

• 6/2026/0929/FULL Granted

  Old Owen's Sports Ground Coopers Lane Potters Bar EN6 4NF

  Installation of 1 no. single padel court

  27 May 2026 Full applications
• 6/2026/0740/FULL Withdrawn

  Land to the rear of 8 Birds Close Welwyn Garden City AL7 4AR

  Erection of a single storey detached dwelling with basement

  27 Apr 2026 Full applications
• 6/2026/1231/FULL Withdrawn

  St Johns Church Of England Jmi School Lemsford Village Lemsford Welwyn Garden City AL8 7TR

  Installation of new fencing and gates across the school boundary adjacent to the main road

  13 Jul 2026 Full applications
• 6/2026/0960/FULL Refused

  15 Tiger Moth Way Hatfield AL10 9LT

  Change of use of general amenity land to residential garden and erection of a 2 metre high timber boundary fence following removal of existing hedge and boundary treatment

  1 Jun 2026 Full applications
• 6/2026/0300/FULL Refused

  Warren Lodge Stables Great North Road Hatfield AL9 5JX

  Change of use of land to use as a Gypsy/Traveller caravan site, comprising 9 pitches each accommodating two caravans, including no more than one static caravan/mobile home per pitch, together with the laying of hardstanding and erection of acoustic fence

  19 Feb 2026 Full applications