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

• Application: 25/01185/LBC (Decided)

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.

• Chapel House 24a Horn Hill Whitwell Hitchin Hertfordshire SG4 8AS

  23/00651/FPH Submitted 17 Mar 2023 50 yards away

  Part two storey and part single storey front extension. Two storey rear extension following demolition of existing conservatory. Replacement roof to inlcude side dormer window and rooflights to facilitate loft conversion.

  Granted Householder Extension Loft or dormer +3 9 docs
  Small domestic

• 8 Oldfield Rise Whitwell Hitchin Hertfordshire SG4 8AP

  21/01789/FPH Submitted 8 Jun 2021 50 yards away

  Single storey front extension and erection of porch canopy, two storey rear extension, insertion of roof light to existing rear roofslope and provision of first floor side window following demolition of existing rear conservatory and existing garage (as amended by plans received 10 September 2021)

  Granted Householder Extension Loft or dormer +2 10 docs
  Small domestic

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

  26/01742/TCA Submitted 10 Jul 2026 100 yards away

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

  Granted Trees

• 1 Oldhall Court 1 Horn Hill Whitwell Hitchin Hertfordshire SG4 8AS

  21/02705/TCA Submitted 20 Sep 2021 100 yards away

  3 x Hornbeams - Reduce to previous points

  Granted Trees 5 docs

• 3 Mimram Close Whitwell Hitchin Hertfordshire SG4 8HR

  26/02185/FPH Submitted 15 Sep 2026 100 yards away

  91% historically approved · decision due ~10 Nov

  Enlargement of rear dormer previously approved under planning permission 26/01476/FPH granted on 29 July 2026.

  Awaiting decision Loft or dormer

• 3 Mimram Close Whitwell Hitchin Hertfordshire SG4 8HR

  26/01476/FPH Submitted 19 Jun 2026 100 yards away

  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

• 26/01774/DOC Decided

  Land Adjacent To Oaklea And South Of Cowards Lane Codicote Hertfordshire SG4 8UN

  Details reserved by Condition 3 (Landscape Details) of reserved matters application 23/00743/RM granted on 18.06.2024.

  Received 28 Jul, published by the council 1 Aug 2026 Conditions
• 26/02096/DOC Decided

  Land East Of 2 Scarp Close Ashwell Street Ashwell Hertfordshire SG7 5FP

  Details reserved by Condition 8 (Ecological Enhancement Plan - EEP) of planning permission reference 26/00676/FP granted on 04.06.2026.

  Received 10 Aug, published by the council 21 Aug 2026 Conditions
• 26/02012/DOC Decided

  66 Park Lane Knebworth Hertfordshire SG3 6PW

  Details reserved by condition 7 (Archaeological Written Scheme of Investigation) of reserved matters application reference no 25/01658/RM granted 28.11.2025.

  Received 10 Aug, published by the council 21 Aug 2026 Conditions
• 26/02376/DOC Decided

  29 Weston Way Baldock Hertfordshire SG7 6EZ

  Details reserved by condition 4 (Arboricultural Method Statement) of planning permission reference 26/01760/FPH granted 03.09.2026.

  Received 21 Sep, published by the council 5 Oct 2026 Conditions
• 26/02310/DOC Decided

  Land To The East Of 2 West Lane Pirton Hertfordshire SG5 3RA

  Details reserved by condition 6 (Ecological Enhancement Plan) of planning permission reference no 25/03153/FP granted 23.06.2026.

  Received 4 Sep, published by the council 14 Sep 2026 Conditions