28 Mardley Avenue Welwyn AL6 0TZ

1. 7 Dec 2022

   Received by Welwyn Hatfield

2. 10 Jan 2023

   Validated

   Checked as complete and ready for consideration.

3. 1 Mar 2023

   Decision issued: Granted

4. 9 Aug 2026

   Added to PlanIndex

Welwyn Hatfield granted permission on 1 March 2023, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• 2 Woodacre Drive Welwyn AL6 0UA

  6/2026/0974/TPO Submitted 3 Jun 2026 50 yards away

  T1 Oak Prune western aspect by 2 metres. (Covered by TPO24 A3 and TPO 642 (2017) G1)

  Refused Trees

• 12 Hillside Way Welwyn AL6 0TY

  6/2023/0210/HOUSE Submitted 27 Jan 2023 100 yards away

  Erection of a two storey rear and side extension with roof alterations including a front dormer and side windows, following the demolition of existing side and rear extensions

  Withdrawn Householder Extension Loft or dormer +3
  Domestic

• 20 Mardley Avenue Welwyn AL6 0UD

  6/2026/1305/TPO Submitted 27 Jul 2026 100 yards away

  Up to a 2m reduction to Cherry tree, to maintain its healthy station and prevent over extension, from growing too large. Fell, process and remove Yew tree as resident has concerns that if it was to uproot or fail it would hit the house due to its location (covered by TPO 24 A3)

  Withdrawn Trees

• 37 Mardley Avenue Welwyn AL6 0TU

  6/2025/2248/FULL Submitted 23 Oct 2025 100 yards away

  Erection of a single chalet dwelling

  Refused Full applications
  Domestic

• 20 Mardley Heights Welwyn AL6 0SX

  6/2024/1895/TPO Submitted 1 Oct 2024 100 yards away

  2 x Silver birches branches thinned out. Fell 1 x Hornbeam. (TPO 641 G5 (2017))

  Refused Trees

• 13 Hillside Way Welwyn AL6 0TY

  6/2023/0939/HOUSE Submitted 3 May 2023 100 yards away

  Erection of single storey rear extension and raising of existing side extension roof to match following demolition of existing conservatory

  Granted Householder Extension Demolition
  Small domestic

• 6/2026/1408/HOUSE Granted

  Wytmead Essendon Hill Essendon Hatfield AL9 6AW

  Reinstatement of the previously truncated chimney

  Received 10 Aug, published by the council 31 Aug 2026 Householder
• 6/2026/1170/HOUSE Granted

  6 Highfields Cuffley Potters Bar EN6 4EL

  Conversion of garage into study room with alterations to the front elevation, repositioning of lower ground floor entrance hall, erection of two storey infill side extension with internal alterations, replacement of existing front and side building brickwork with K-Render finish, removal of chimney and installation of 2 rooflights

  Received 6 Jul, published by the council 30 Jul 2026 Householder
• 6/2026/1177/HOUSE Granted

  Red Lodge High Road Essendon Hatfield AL9 6HU

  Erection of two single-storey side extensions, detached garage with barn-hipped roof and photovoltaic panels, relocated garden room and associated works to hardstanding and site layout.

  Received 7 Jul, published by the council 9 Aug 2026 Householder
• 6/2026/1376/HOUSE Granted

  18 Briary Wood Lane Welwyn AL6 0TF

  Erection of a single storey ground floor extension & part two storey rear, raising the roof and alterations to facilitate loft conversion to include new crown roof with front & rear dormers

  Received 4 Aug, published by the council 22 Aug 2026 Householder
• 6/2026/1392/HOUSE Granted

  1 Little Wade Welwyn Garden City AL7 4LE

  Erection of a single storey rear extension

  Received 6 Aug, published by the council 15 Aug 2026 Householder