22 Hawkshead Lane Hatfield AL9 7TB

1. 9 Aug 2021

   Received by Welwyn Hatfield

2. 13 Sep 2021

   Decision issued: Granted

3. 7 Sep 2026

   Added to PlanIndex

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

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

• 22 Hawkshead Lane Hatfield AL9 7TB

  6/2021/2348/LAWP Submitted 9 Aug 2021 0m away

  Certificate of lawfulness for the erection of a 3m two storey rear extension

  Granted Lawful development Extension

• 22 Hawkshead Lane Hatfield AL9 7TB

  6/2021/2349/LAWP Submitted 9 Aug 2021 0m away

  Certificate of lawfulness for the erection of a single storey side extension to side of original dwelling only.

  Granted Lawful development Extension
  Small domestic

• 24 Hawkshead Lane North Mymms AL9 7TB

  6/2026/0700/HOUSE Submitted 20 Apr 2026 48m away

  Alteration and extension to roof with the insertion of a new rooflight. Garage conversion involving the replacement of garage door with window

  Refused Householder Extension Loft or dormer +1
  Small domestic

• Hawkshead Lane North Mymms Brookmans Park Hatfield AL9 7TA

  6/2023/0424/PN15 Submitted 23 Feb 2023 425m away

  Erection of a 15m high slim-line monopole with 3 no. antennas, 3 no. equipment cabinets and ancillary development

  Refused Prior approval

• Small Animal Hospital at the Hawkshead Campus of the Royal Veterinary College AL9 7TA

  6/2026/0765/EIA Submitted 30 Apr 2026 454m away

  Request for a screening opinion for proposal to implement the proposals for a new Small Animal Hospital as per the Approved Hawkshead Campus Masterplan (2018): Request for an Environmental Impact Assessment (EIA) Screening Opinion under Regulations 5 and 6 of the Town and Country Planning (E nvironmental Impact Assessment) Regulations 2017 (as amended)

  Decided Outline

• Royal Veterinary College Hawkshead Lane North Mymms AL9 7TA

  6/2026/1337/FULL Submitted 30 Jul 2026 489m away

  81% historically approved · decision due ~28 Sep

  Relocation of the Transfusion Medicine Vet Pod and associated parking, landscaping and associated works

  Awaiting decision Full applications

• 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