55 Calder Avenue Brookmans Park Hatfield AL9 7AH

1. 19 Jul 2021

   Received by Welwyn Hatfield

2. 28 Jul 2021

   Validated

   Checked as complete and ready for consideration.

3. 21 Sep 2021

   Decision issued: Granted

4. 14 Sep 2026

   Added to PlanIndex

Welwyn Hatfield granted permission on 21 September 2021, 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.

• 55 Calder Avenue Hatfield AL9 7AH

  6/2022/2833/HOUSE Submitted 14 Dec 2022 50 yards away

  Erection of a two-storey side extension, part single part two-storey rear extension and alterations to roof over existing garage

  Granted Householder Extension
  Domestic

• 25 Georges Wood Road Brookmans Park AL9 7BY

  6/2021/2011/HOUSE Submitted 2 Jul 2021 100 yards away

  Erection of garden room following partial demolition of existing conservatory

  Granted Householder Extension Demolition
  Small domestic

• 29 Georges Wood Road Brookmans Park Hatfield AL9 7BY

  6/2023/0539/HOUSE Submitted 9 Mar 2023 100 yards away

  Erection of single storey front infill extension, installation of dormers into both flank facing roofslopes, and erection of single storey side to rear extension.

  Granted Householder Extension Loft or dormer
  Small domestic

• 21 Georges Wood Road Brookmans Park AL9 7BY

  6/2024/1281/HOUSE Submitted 8 Jul 2024 100 yards away

  Erection of a single side extension with raised rear patio following demolition of existing garage and outbuilding

  Granted Householder Extension Demolition
  Small domestic

• 11 Georges Wood Road Brookmans Park AL9 7BY

  6/2025/0979/HOUSE Submitted 27 May 2025 150 yards away

  Erection of a two-storey front/side extension, single storey rear extension, installation of dormers to facilitate the conversion of the loft to habitable space

  Granted Householder Extension Loft or dormer
  Small domestic

• 11 Georges Wood Road Brookmans Park AL9 7BY

  6/2026/1407/FULL Submitted 10 Aug 2026 150 yards away

  80% historically approved · decision due ~6 Oct

  Erection of new dwelling and associated hard and soft landscaping following demolition of the existing dwelling and the detached garage.

  Awaiting decision Full applications New dwelling Demolition
  Domestic

• 6/2026/1198/HOUSE Granted

  9 Mardley Hill Welwyn AL6 0UE

  Erection of single storey front, side and rear extension, raising the existing roof and formation of rear dormer. Alterations to the fenestration, including, installation of new windows and doors and external rendering and cladding, following the demolition of garage and porch

  Received 10 Jul, published by the council 24 Jul 2026 Householder
• 6/2026/1257/HOUSE Granted

  21 The Swallows Welwyn Garden City AL7 1BX

  Garage conversion with alterations to openings to front and rear elevations

  Received 17 Jul, published by the council 1 Aug 2026 Householder
• 6/2026/1293/HOUSE Granted

  33 Claves Crescent Welwyn Garden City AL7 1WN

  Erection of a single storey rear conservatory

  Received 22 Jul, published by the council 1 Aug 2026 Householder
• 6/2026/1202/HOUSE Granted

  40 Cecil Crescent Hatfield AL10 0HG

  Erection of single storey rear extension

  Received 10 Jul, published by the council 9 Aug 2026 Householder
• 6/2026/1228/HOUSE Granted

  109 Mount Way Welwyn Garden City AL7 4LA

  Erection of single storey front extension

  Received 13 Jul, published by the council 9 Aug 2026 Householder