2 Cunningham Avenue Hatfield AL10 9LP

1. 26 Aug 2026

   Received by Welwyn Hatfield

2. 9 Sep 2026

   Validated

   Checked as complete and ready for consideration.

3. 22 Sep 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 4 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 lawful development applications in a median of 58 days. More in our guide to how long planning decisions take.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 2 Nimrod Drive Hatfield AL10 9LS

  6/2022/2222/HOUSE Submitted 26 Sep 2022 100 yards away

  Erection of a single-storey rear extension and garage conversion and rear extension

  Granted Householder Extension
  Small domestic

• 19 Cunningham Avenue Hatfield AL10 9LR

  6/2026/1132/LAWE Submitted 30 Jun 2026 100 yards away

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

  Refused Lawful development

• 9 Flamingo Close Hatfield AL10 9LU

  6/2026/1210/LAWE Submitted 10 Jul 2026 150 yards away

  Certificate of lawfulness for the existing use of the property as a HMO (Use Class C4) in continuous use for over 10 years

  Refused Lawful development

• 16 Nimrod Drive Hatfield AL10 9LS

  6/2022/2774/LAWP Submitted 6 Dec 2022 200 yards away

  Certificate of lawfulness for the erection of a porch

  Granted Lawful development Extension
  Small domestic

• 16 Nimrod Drive Hatfield AL10 9LS

  6/2022/2773/HOUSE Submitted 6 Dec 2022 200 yards away

  Erection of two storey rear extension

  Granted Householder Extension
  Domestic

• 15 Tiger Moth Way Hatfield AL10 9LT

  6/2026/0960/FULL Submitted 1 Jun 2026 200 yards away

  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

  Refused Full applications
  Small domestic

• 6/2026/1288/LAWE Granted

  1 The Limberlost Welwyn AL6 9TS

  Certificate of existing lawfulness for a single storey extension

  Received 22 Jul, published by the council 22 Aug 2026 Lawful development
• 6/2026/1297/LAWE Granted

  White Lodge Farm The Bellbrook Bulls Lane Hatfield AL9 7AZ

  Certificate of lawfulness in relation to existing gate and fencing

  Received 23 Jul, published by the council 9 Aug 2026 Lawful development
• 6/2026/1370/LAWP Granted

  17-17A Mill Lane Welwyn AL6 9EU

  Certificate of lawfulness for the change of use of offices to 3 x 2 bedroom flats

  Received 3 Aug, published by the council 15 Aug 2026 Lawful development
• 6/2026/1218/LAWP Granted

  43 Great Ley Welwyn Garden City AL7 4TJ

  Certificate of lawfulness for rear dormer roof extension to form a loft conversion

  Received 13 Jul, published by the council 9 Aug 2026 Lawful development
• 6/2026/1559/LAWP Awaiting decision

  28 Pleasant Rise Hatfield AL9 5DU

  Certificate of lawfulness for construction of a new detached, single-storey garden room/summerhouse within an existing rear garden

  Received 8 Sep, published by the council 22 Sep 2026 Lawful development