16 Chipmunk Chase Hatfield AL10 9GH

1. 24 Mar 2026

   Received by Welwyn Hatfield

2. 8 Jul 2026

   Validated

   Checked as complete and ready for consideration.

3. 24 Jul 2026

   Added to PlanIndex

4. 15 Aug 2026

   Status changed to Under Consideration

   Previously Under Consultation.

5. 2 Sep 2026

   Decision issued: Refused

Welwyn Hatfield refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. 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 Barlow Close Hatfield AL10 9GZ

  6/2023/0298/LAWP Submitted 7 Feb 2023 208m away

  Certificate of lawfulness for single storey side and rear extension

  Granted Lawful development Extension
  Small domestic

• 2 Barlow Close Hatfield AL10 9GZ

  6/2023/0065/COND Submitted 11 Jan 2023 208m away

  Submission of details pursuant to condition number 1 (material sample) on planning permission 6/2021/3553/HOUSE

  Granted Conditions
  Major scheme

• Howe Dell School The Runway Hatfield AL10 9AH

  6/2026/0478/FULL Submitted 16 Mar 2026 218m away

  Construction of a Multi Use Games Area

  Granted Full applications

• 48 The Runway Hatfield Hertfordshire AL10 9GL

  6/2022/2506/LAWP Submitted 1 Nov 2022 223m away

  Certificate of lawfulness for the change of use from C3 dwellinghouse to C2 residential institution

  Refused Lawful development
  Domestic

• Howe Dell School The Runway Hatfield AL10 9AH

  6/2026/1419/COND Submitted 11 Aug 2026 232m away

  89% historically approved · decision due ~7 Oct

  Submission of details pursuant to Condition 1 (Biodiversity Gain Plan), Condition 2 (Landscape and Ecological Management Plan (LEMP)), Condition 3 (Construction Traffic Management Plan (CTMP)) and Condition 4 (Tree Survey, Arboricultural Method Statement and Tree Protection Strategy) on planning permission 6/2026/0478/FULL

  Awaiting decision Conditions Trees

• 162 Dragon Road Hatfield AL10 9NZ

  6/2026/1261/FULL Submitted 17 Jul 2026 296m away

  80% historically approved · decision due ~11 Sep

  Change of use from a six-person HMO to a seven-person HMO with garage conversion to communal living space and new cycle and refuse/recycling store

  Awaiting decision Full applications

• 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