29 Stag Green Avenue Hatfield AL9 5EB

1. 16 Feb 2023

   Received by Welwyn Hatfield

2. 18 Apr 2023

   Decision issued: Granted

3. 22 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

• 29 Stag Green Avenue Hatfield Hertfordshire AL9 5EB

  6/2023/0358/HOUSE Submitted 15 Feb 2023 0m away

  Erection of rear infill extension with alterations to openings, first floor rear extension with insertion of rooflight to existing roof and front infill kitchen extension, under existing canopy

  Granted Householder Extension Loft or dormer
  Domestic

• 23 Stag Green Avenue Hatfield AL9 5EB

  6/2022/2819/HOUSE Submitted 13 Dec 2022 41m away

  Erection of first floor rear extension and front porch/canopy infill extension with tiled pitched roof to front canopy

  Granted Householder Extension
  Small domestic

• 23 Stag Green Avenue Hatfield AL9 5EB

  6/2022/2671/LAWP Submitted 23 Nov 2022 43m away

  Certificate of lawfulness for the erection of a single storey side extension

  Granted Lawful development Extension
  Small domestic

• 16 The Ryde Hatfield AL9 5DH

  6/2021/0220/HOUSE Submitted 25 Jan 2021 62m away

  Renovation of existing detached house, to include single storey extension of the entrance porch, removal of existing boiler house to rear extension, alterations to existing openings to front and rear elevations, and installation of new render and horizontal cladding to all elevations.

  Granted Householder New dwelling Extension 2 docs
  Small domestic

• 1 Pleasant Rise Hatfield Hertfordshire AL9 5DR

  6/2023/0482/HOUSE Submitted 2 Mar 2023 96m away

  Erection of a single storey side extension following demolition of existing porch, single storey side extension with insertion of rooflights, following part garage conversion plus addition of 2 x sun pipes to existing pitched roof

  Granted Householder Extension Loft or dormer +1
  Small domestic

• 13 Stag Green Avenue Hatfield AL9 5EB

  6/2021/0331/FULL Submitted 3 Feb 2021 98m away

  Change of use of land from amenity to residential and the erecton of a picket fence at the boundary no higher than 40 cm.

  Granted Full applications
  Small 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