Former British Aerospace Gatehouse Immediately South of Staff Mess Comet Way Hatfield AL10 0XR

1. 13 Apr 2026

   Received by Welwyn Hatfield

2. 11 Jun 2026

   Validated

   Checked as complete and ready for consideration.

3. 20 Jul 2026

   Decision issued: Refused

4. 24 Jul 2026

   Added to PlanIndex

Welwyn Hatfield refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. More in our guide to what happens after a planning decision.

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.

• Hatfield Police Station Comet Way Hatfield AL10 9SJ

  6/2026/0285/LB Submitted 19 Feb 2026 114m away

  Installation of various illuminated signage and logos mounted on standalone totems and building façade

  Granted Heritage and listed buildings 1 doc

• Hertfordshire Constabulary Central Area Headquarters And Hatfield Police Station Comet Way Hatfield AL10 9SJ

  6/2026/0617/TPO Submitted 8 Apr 2026 122m away

  T9 Weeping willow to remove limb with large hollow at approximately 2m SE side. T10 Weeping willow to remove large central limb growing towards police station. Covered by TPO 701 (2017)

  Granted Trees

• Hertfordshire Constabulary Central Area Headquarters And Hatfield Police Station Comet Way Hatfield AL10 9SJ

  6/2023/0330/TPO Submitted 10 Feb 2023 123m away

  T9-T10 Willow x 2. Re pollard back to historic points. Trees covered by TPO 701 (2017)

  Granted Trees

• 12 Harpsfield Broadway Hatfield AL10 9TF

  6/2022/1444/FULL Submitted 21 Jun 2022 128m away

  Erection of part two, part three storey rear extension with mansard roof and conversion to 8 flats comprising 6 x 2-bed and 2 x studio

  Granted Full applications New dwelling Extension +1
  Several homes

• 12 Harpsfield Broadway Hatfield AL10 9TF

  6/2024/2159/COND Submitted 8 Nov 2024 128m away

  Submission of details pursuant to conditions 1 (Construction Management Plan) 2 (Noise due to transport sources) 3 (noise from nearby commercial activities) 4 (parking of cycles) 5 (refuse bin and recycling materials storage bins) 6 (heat pump hot water cylinders) on planning permission 6/2022/1444/FULL

  Split decision Conditions

• 9 Harpsfield Broadway Hatfield AL10 9TF

  6/2026/0596/ADV Submitted 7 Apr 2026 150m away

  Advertisement consent for the retention of one internally illuminated fascia sign and one internally illuminated projecting box sign

  Granted Advertising

• 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
• 6/2026/1250/LAWP Granted

  40 Dellsome Lane Welham Green Hatfield AL9 7ND

  Certificate of lawfulness for Class A - Larger single storey rear extension (previously subject to prior approval application ref: 6/25/1851/PN8), Class B - Roof extension/hip to gable conversion, Class C - Other alterations to roof

  Received 16 Jul, published by the council 9 Aug 2026 Lawful development
• 6/2026/1210/LAWE Refused

  9 Flamingo Close Hatfield AL10 9LU

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

  Received 10 Jul, published by the council 9 Aug 2026 Lawful development
• 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

  Received 27 Apr, published by the council 24 Jul 2026 Lawful development