43 Great Ley Welwyn Garden City AL7 4TJ

1. 13 Jul 2026

   Received by Welwyn Hatfield

2. 15 Jul 2026

   Validated

   Checked as complete and ready for consideration.

3. 9 Aug 2026

   Added to PlanIndex

4. 15 Aug 2026

   Status changed to Under Consideration

   Previously Under Consultation.

5. Decision

   Awaiting decision

   Decision expected by 9 September 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. 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 lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

• 50 Great Ley Welwyn Garden City AL7 4TL

  6/2021/1938/LAWP Submitted 25 Jun 2021 115m away

  Certificate of lawfulness for erection of single storey rear extension.

  Refused Lawful development Extension
  Small domestic

• 14 Four Acres Welwyn Garden City AL7 4NW

  6/2020/1680/LAWP Submitted 13 Jul 2020 173m away

  Certificate of Lawfulness for erection of summer house in rear garden

  Refused Lawful development

• 60 Sir John Newsom Way Welwyn Garden City AL7 4FL

  6/2025/0628/FULL Submitted 1 Apr 2025 225m away

  Erection of a detached two-storey building compromising 2 x 2 bedroom flats

  Withdrawn Full applications New dwelling

• 4 Old Dairy Yard Welwyn Garden City AL7 4BY

  6/2026/0337/HOUSE Submitted 23 Feb 2026 240m away

  Erection of first floor rear extension, loft conversion with dormers to front and rear and insertion of roof lights

  Granted Householder Extension Loft or dormer
  Domestic

• 3 Old Dairy Yard Welwyn Garden City AL7 4BY

  6/2024/0933/HOUSE Submitted 20 May 2024 244m away

  Installation of air source heat pump

  Granted Householder
  Domestic

• 2 Twelve Acres Welwyn Garden City AL7 4TG

  6/2024/1788/LAWP Submitted 17 Sep 2024 255m away

  Certificate of lawfulness for a proposed side dormer

  Granted Lawful development Loft or dormer

• 6/2026/0735/LAWE Refused

  1 Northaw Place Coopers Lane Northaw Potters Bar EN6 4NQ

  Certificate of lawfulness for the existing use of the land as residential garden land ancillary to the dwellinghouse continuously since 2012

  27 Apr 2026 Lawful development
• 6/2026/1132/LAWE Refused

  19 Cunningham Avenue Hatfield AL10 9LR

  Certificate of existing lawfulness of a 5 person HMO since 6 April 2006

  30 Jun 2026 Lawful development
• 6/2026/1506/LAWP Awaiting decision

  Gosmore Brocket Road Welwyn Garden City AL8 7TT

  Erection of single storey side extensions x 2 and two storey rear extension

  27 Aug 2026 Lawful development
• 6/2026/1503/LAWE Awaiting decision

  27 Batterdale Hatfield AL9 5JG

  Certificate of lawfulness for the existing like-for-like replacement of damaged and aged windows on the front and rear elevations

  26 Aug 2026 Lawful development
• 6/2026/1044/LAWP Granted

  5 Peartree Court Welwyn Garden City AL7 3XN

  Certificate of lawfulness for the change of use from C3 (dwellinghouse) to C4 (HMO for up to 6 unrelated residents)

  15 Jun 2026 Lawful development