HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

This site has had 13 applications since 2025: 2 approved, 0 refused.

• PL/26/01955/NMA Decided

  HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  Proposed non-material amendment to planning permission 21/02851/AOP (allowed on appeal 22/00125/REF) (Outline Planning Application with all matters reserved except for access, layout and scale for the construction of a new Category C prison (up to 67,000 sqm GEA) within a secure perimeter fence together with access, parking, landscaping and associated engineering works) to allow for amendment to wording of Condition 26.

  Decided 2 Apr 2026 Amendments
• PL/25/6622/CONDA Decided

  HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  Application for approval of details subject to condition 37 (surface water drainage) relating to Planning Permission 21/02851/AOP (allowed on appeal 22/00125/REF)

  Decided 22 Apr 2026 Conditions
• PL/25/5758/MDLA Decided

  HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  Application under Section 106 of the Town & Country Planning Act 1990 (as amended) to discharge planning obligation at First Schedule, Part 2, (Highway Works Delivery Programme) of the Section 106 Agreement for application 21/02851/AOP

  Decided 31 Mar 2026 Conditions
• PL/25/4864/SA Granted

  HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  Certificate of Lawfulness for proposed creation of temporary haul road for construction

  Decided 17 Dec 2025 Lawful development
• PL/25/4863/NMA Decided

  HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  Non material amendment to planning permission 21/02851/AOP (Outline Planning Application with all matters reserved except for access, layout and scale for the construction of a new Category C prison (up to 67,000 sqm GEA) within a secure perimeter fence together with access, parking, landscaping and associated engineering works) to ensure the discharge rates (drainage) reflect the permeable areas of the detailed scheme

  Decided 17 Dec 2025 Amendments
• PL/25/3615/NMA Decided

  HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  Proposed non-material amendment to permission for Outline Planning Application with all matters reserved except for access, layout and scale for the construction of a new Category C prison (up to 67,000 sqm GEA) within a secure perimeter fence together with access, parking, landscaping and associated engineering works granted under planning ref: 21/02851/AOP (allowed on appeal 22/00125/REF)

  Decided 24 Sep 2025 Amendments
• PL/25/3226/CONDA Decided

  HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  Application for approval of details subject to condition 10 (construction traffic management plan) relating to Planning Permission 21/02851/AOP (allowed on appeal 22/00125/REF)

  Decided 31 Mar 2026 Conditions
• PL/25/3123/SA Granted

  HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  Certificate of lawfulness for proposed creation of temporary construction access

  Decided 10 Oct 2025 Lawful development
• PL/25/3128/CONDA Decided

  HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  Application for approval of details subject to condition 25 (Landscape Management Plan) relating to Planning Permission 21/02851/AOP (allowed on appeal 22/00125/REF)

  Decided 29 Aug 2025 Conditions
• PL/25/3029/NMA Decided

  HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  Proposed non-material amendment to permission for Outline Planning Application with all matters reserved except for access, layout and scale for the construction of a new Category C prison (up to 67,000 sqm GEA) within a secure perimeter fence together with access, parking, landscaping and associated engineering works granted under planning ref: 21/02851/AOP (allowed on appeal 22/00125/REF)

  Decided 30 Sep 2025 Amendments

1. 14 Aug 2025

   Received by Buckinghamshire

2. 4 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 9 October 2025, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Buckinghamshire took a median of 60 days over the applications it decided in the last year.

This application is with Buckinghamshire for determination, against a statutory target of eight weeks. Over the last year Buckinghamshire decided condition discharge and variation applications in a median of 62 days. More in our guide to how long planning decisions take.

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.

• HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  PL/26/01955/NMA Submitted 10 Mar 2026 50 yards away

  Proposed non-material amendment to planning permission 21/02851/AOP (allowed on appeal 22/00125/REF) (Outline Planning Application with all matters reserved except for access, layout and scale for the construction of a new Category C prison (up to 67,000 sqm GEA) within a secure perimeter fence together with access, parking, landscaping and associated engineering works) to allow for amendment to wording of Condition 26.

  Decided Amendments 5 docs
  Small domestic

• Hm Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  21/B2851//NON Submitted 15 Jul 2025 50 yards away

  Proposed non-material amendment to permission for Outline Planning Application with all matters reserved except for access, layout and scale for the construction of a new Category C prison (up to 67,000 sqm GEA) within a secure perimeter fence together with access, parking, landscaping and associated engineering works granted under planning ref: 21/02851/AOP (allowed on appeal 22/00125/REF)

  Decided Amendments 9 docs
  Small domestic

• HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  PL/25/4863/NMA Submitted 23 Oct 2025 50 yards away

  Non material amendment to planning permission 21/02851/AOP (Outline Planning Application with all matters reserved except for access, layout and scale for the construction of a new Category C prison (up to 67,000 sqm GEA) within a secure perimeter fence together with access, parking, landscaping and associated engineering works) to ensure the discharge rates (drainage) reflect the permeable areas of the detailed scheme

  Decided Amendments 9 docs
  Small domestic

• HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  PL/25/3615/NMA Submitted 10 Sep 2025 50 yards away

  Proposed non-material amendment to permission for Outline Planning Application with all matters reserved except for access, layout and scale for the construction of a new Category C prison (up to 67,000 sqm GEA) within a secure perimeter fence together with access, parking, landscaping and associated engineering works granted under planning ref: 21/02851/AOP (allowed on appeal 22/00125/REF)

  Decided Amendments 4 docs
  Small domestic

• HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  PL/25/4864/SA Submitted 23 Oct 2025 50 yards away

  Certificate of Lawfulness for proposed creation of temporary haul road for construction

  Granted Lawful development 8 docs

• HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  PL/25/3226/CONDA Submitted 27 Aug 2025 100 yards away

  Application for approval of details subject to condition 10 (construction traffic management plan) relating to Planning Permission 21/02851/AOP (allowed on appeal 22/00125/REF)

  Decided Conditions 6 docs

• PL/26/02080/MDLA Decided

  Land Rear Of 33 To 45 Glynswood High Wycombe Buckinghamshire

  Application under Section 106 of the Town & Country Planning Act 1990 (as amended) to discharge planning obligations at Part 1 of Schedule 3 (SUDS), Parts 1 and 2 of Schedule 4 (Open Space Scheme) of the Section 106 Agreement for application 21/07911/FUL

  Received 23 Mar, published by the council 22 Sep 2026 Conditions
• PL/26/01424/CONDA Decided

  Land To The Rear Of Bell Lane Combined School Bell Lane Little Chalfont Buckinghamshire

  Application for approval of details subject to condition 5 (Surface Water Drainage Scheme) of planning approval PL/24/3925/FA

  Received 24 Feb, published by the council 4 Aug 2026 Conditions
• PL/26/02937/CONDA Decided

  Ashwells Field Cock Lane Tylers Green Buckinghamshire

  Application for approval of details subject to Condition 16 (Surface water drainage scheme) of planning approval 18/05002/R9OUTE

  Received 9 Apr, published by the council 10 Oct 2026 Conditions
• PL/25/6414/CONDA Decided

  Land Off Horns Lane High Wycombe Buckinghamshire

  Application for approval of details subject to condition 9 (CTMP) of planning approval 21/05368/OUT

  Received 15 Dec, published by the council 27 Jul 2026 Conditions
• PL/26/02104/VRC Granted

  59 Old Town Close Beaconsfield Buckinghamshire HP9 1LF

  Variation of condition 4 (approved plans) attached to planning permission PL/25/4751/FA (Part-single/part-two storey side/rear extension, installation of a first-floor flank window and re-siting of existing solar panels and rooflights) to allow for the amendment of the submitted and approved drawings to reflect various fenestration alterations

  Received 16 Mar, published by the council 15 Sep 2026 Conditions