19 Carbone Hill Northaw Potters Bar EN6 4PJ

1. 15 Jul 2021

   Received by Welwyn Hatfield

2. 31 Aug 2021

   Decision issued: Granted

3. 25 Aug 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

• 19 Carbone Hill Northaw Potters Bar EN6 4PJ

  6/2021/2157/LAWP Submitted 16 Jul 2021 0m away

  Certificate of lawfulness for a single storey side extension, front porch extension and erection of outbuilding

  Refused Lawful development Extension
  Small domestic

• 19 Carbone Hill Northaw Potters Bar EN6 4PJ

  6/2021/1648/LAWP Submitted 24 May 2021 0m away

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

  Refused Lawful development Extension

• 35 Carbone Hill Northaw Potters Bar EN6 4PN

  6/2026/1093/FULL Submitted 24 Jun 2026 152m away

  Erection of 2 no. detached houses with integral garages

  Refused Full applications

• Land adjacent to The Warren 8 Carbone Hill Northaw Potters Bar EN6 4PL

  6/2026/0399/COND Submitted 4 Mar 2026 172m away

  Submission of details pursuant to condition number 1 (Construction Management Plan) on planning permission 6/2024/2237/VAR

  Granted Conditions

• Land adjacent The Warren 8 Carbone Hill Northaw Potters Bar EN6 4PL

  6/2026/1083/LAWP Submitted 23 Jun 2026 173m away

  81% historically approved · decision due ~18 Aug

  Certificate of lawfulness to certify that the proposed works to carry on and complete the erection of a dwellinghouse approved by planning permission 6/2023/0677/FULL dated 23 June 2023, as amended by planning permission 6/2024/2237/VAR dated 7 April 2025, would be lawful

  Awaiting decision Lawful development
  Domestic

• Land adjacent The Warren 8 Carbone Hill Northaw Potters Bar EN6 4PL

  6/2026/1083/LAWE Submitted 23 Jun 2026 173m away

  81% historically approved · decision due ~18 Aug

  Certificate of lawfulness to certify that the proposed works to carry on and complete the erection of a dwellinghouse approved by planning permission 6/2023/0677/FULL dated 23 June 2023, as amended by planning permission 6/2024/2237/VAR dated 7 April 2025, would be lawful

  Awaiting decision Lawful development
  Domestic

• 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