18 Horn Hill Whitwell Hitchin Hertfordshire SG4 8AS

1. 18 Feb 2026

   Received by North Hertfordshire

2. 28 Apr 2026

   Decision issued: Approval of Details

3. 9 Aug 2026

   Added to PlanIndex

North Hertfordshire granted permission on 28 April 2026, 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.

This application deals with conditions on an existing permission, supplying the details a condition requires or asking to vary or remove one, without reopening the permission itself. More in our guide to planning application types.

• Old Hall Court 1 Horn Hill Whitwell Hertfordshire SG4 8AS

  26/01742/TCA Submitted 10 Jul 2026 73m away

  99% historically approved · decision due ~4 Sep

  3x Hornbeam - Reduce approx as previously (2-3ft )

  Decided Trees

• 3 Mimram Close Whitwell Hitchin Hertfordshire SG4 8HR

  26/01476/FPH Submitted 19 Jun 2026 86m away

  90% historically approved · decision due ~14 Aug

  Single storey rear extension. Insertion of front ground floor window following removal of existing garage doors to facilitate garage conversion. Insertion of rear dormer window and front rooflights to facilitate loft conversion into habitable accommodation. Alterations to fenestration.

  Decided Extension Loft or dormer +1
  Small domestic

• Old Hall Court 1 Horn Hill Whitwell Hertfordshire SG4 8AS

  24/02155/TCA Submitted 25 Sep 2024 90m away

  3x Hornbeam - Reduce approx 2-3ft

  Granted Trees 5 docs

• 2 Mimram Close Whitwell Hitchin Hertfordshire SG4 8HR

  21/01385/FPH Submitted 29 Apr 2021 91m away

  Raising of roof to create first floor, two storey front extension, two storey side extensions, first floor rear extension, front and rear dormers, front porch, and erection of detached garage with habitable room to first floor

  Decided Householder Extension Loft or dormer 16 docs
  Small domestic

• 48a Horn Hill Whitwell Hitchin Hertfordshire SG4 8AR

  26/01709/LDCP Submitted 7 Jul 2026 166m away

  90% historically approved · decision due ~1 Sep

  Alterations to existing garage fenestration to include replacing door with brickwork and a window, replace existing roof coverings and replace existing timber framed and clad external wall with a brick wall to facilitate partial conversion into habitable accommodation.

  Awaiting decision Windows or glazing

• 71 High Street Whitwell Hitchin Hertfordshire SG4 8AH

  23/00349/TCA Submitted 28 Feb 2023 182m away

  T3, T5 Lawson Cypress, T4 Cherry laurel, T6 Leyland Cypress - Remove

  Granted Trees 6 docs

• 26/02159/DOC Awaiting decision

  66 Park Lane Knebworth Hertfordshire SG3 6PW

  Details reserved by Condition 6 (Construction Method Statement) of outline planning permission reference 23/02946/OP granted on 18.06.2025.

  8 Sep 2026 Conditions
• 26/02156/DOC Awaiting decision

  Northway Filling Station Great North Road Hinxworth Baldock Hertfordshire SG7 5EX

  Details reserved by Condition 6 (Sustainable drainage planters) of planning permission reference 25/02260/FP granted on 21.07.2026.

  8 Sep 2026 Conditions
• 26/02244/DOC Awaiting decision

  The Lodge Bungalow 56 High Street Baldock Hertfordshire SG7 6BL

  Details reserver by Condition 9 (Sections of windows) of planning permission reference 26/00103/FPH granted on 30.07.2026.

  27 Aug 2026 Conditions
• 26/02242/DOC Awaiting decision

  The Lodge Bungalow 56 High Street Baldock Hertfordshire SG7 6BL

  Details reserver by Condition 7 (Excavation) of planning permission reference 26/00103/FPH granted on 30.07.2026.

  27 Aug 2026 Conditions
• 26/02241/DOC Awaiting decision

  The Lodge Bungalow 56 High Street Baldock Hertfordshire SG7 6BL

  Details reserver by Condition 5 (Details of earthworks) of planning permission reference 26/00103/FPH granted on 30.07.2026.

  27 Aug 2026 Conditions