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Planning application

6/2026/0766/MAJ

45-63 Brownfields Mill Brownfields Welwyn Garden City AL7 1AN

Awaiting decision Welwyn Hatfield MAJOR DEVELOPMENT

Proposal

Erection of an additional storey to the roof of the building to accommodate additional office space.

As published by the council, reference 6/2026/0766/MAJ

Timeline

Dates from the published record

  1. 30 Apr 2026

    Received by Welwyn Hatfield

  2. 21 May 2026

    Validated

    Checked as complete and ready for consideration.

  3. 24 Jul 2026

    Added to PlanIndex

  4. Decision

    Awaiting decision

    The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.

What happens while it is decided

The process from here

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.

About full applications applications

How this application type works

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

Nearby applications

Within 500 metres

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  • 6/2025/2413/VAR Awaiting decision

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  • 30 Watchmead Welwyn Garden City AL7 1LT

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  • 6/2026/0717/COND Awaiting decision

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    23 Apr 2026 297m away Conditions

In Welwyn Hatfield

  • 6/2026/0686/FULL Withdrawn

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    Erection of new dwelling and associated hard and soft landscaping following demolition of the existing dwelling and the detached garage

    17 Apr 2026 Full applications
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    Erection of a hay store and a machinery store

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  • 1 High Dells Hatfield AL10 9JD

    Erection of a two-storey dwelling as a subdivision of the existing plot, with associated car parking areas and erection of a single-storey rear extension to the existing property

    17 Nov 2025 Full applications
  • Tesco Superstore Great North Road Hatfield AL9 5JY

    Installation of one self service laundry kiosk to Tesco superstore curtilage

    3 Jun 2026 Full applications
  • 6/2025/2445/FULL Withdrawn

    Tesco Heart Building Car Park Shire Park Welwyn Garden City AL7 1TW

    Installation of one padel tennis court as an additional ancillary sporting and recreational facility to the Tesco office headquarters, together with associated floodlighting, hard and soft landscaping works

    21 Nov 2025 Full applications