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. 15 Jul 2025

   Received by Buckinghamshire

2. 18 Aug 2025

   Decision issued: Non material amendt-accepted

3. 4 Aug 2026

   Added to PlanIndex

Buckinghamshire has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. More in our guide to what happens after a planning decision.

An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. 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 0m 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

  PL/25/4863/NMA Submitted 23 Oct 2025 0m 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/25/4864/SA Submitted 23 Oct 2025 29m 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/25/2838/MDLA Submitted 14 Aug 2025 51m away

  89% historically approved · decision due ~9 Oct

  Application to amend section 106 agreement to trigger for submission and approval of travel plan prior to occupation relating to 21/02851/AOP

  Awaiting decision Conditions 4 docs

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

  PL/25/5758/MDLA Submitted 20 Nov 2025 69m away

  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 Conditions 3 docs

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

  PL/25/3615/NMA Submitted 10 Sep 2025 103m 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

• PL/26/07501/NMA Awaiting decision

  14 Culverton Hill Princes Risborough Buckinghamshire HP27 0DZ

  Non material amendment to planning permission ref: PL/26/00991/FA (Two storey side extension and single storey front extension) to allow for the front door to be brought forward in line with the front of the house.

  Amendments
• PL/26/07378/NMA Awaiting decision

  52 Marygold Walk Little Chalfont Buckinghamshire HP6 6QF

  Non-material amendment to planning permission ref: PL/26/03994/FA (Part two-storey side extension, part single-storey side extension, front porch extension, and loft conversion incorporating a rear dormer and Juliet balcony alongside other changes to fenestration) to allow for reduction of the front porch extension back to as it is, addition of window to the rear in the kitchen and alignment of first floor windows to ground floor window at the rear and in the front.

  Amendments
• PL/26/07297/NMA Awaiting decision

  Inkerman House Amersham Road Hazlemere Buckinghamshire HP15 7JH

  Non material amendment to planning permission 25/05719/FUL (Erection of a temporary sales suite, including car parking, access and landscaping) to allow sales cabin to remain on site until December 2029 and amend wording of Condition 1 to facilitate this.

  Amendments
• PL/26/07289/NMA Awaiting decision

  Beni-mora West Street Buckingham Buckinghamshire MK18 1HP

  Non-material amendment to planning permission ref: PL/26/02462/FA (Enlargement of first floor habitable area by converting the existing hipped roof to a gable end roof and the installation of dormer windows on the front and rear elevations) to allow for the removal of the Dutch barn hips to the main roof to have straight gable ends.

  Amendments
• PL/26/07225/NMA Awaiting decision

  23 Chestnut Close Amersham Buckinghamshire HP6 6EQ

  Non-material amendment to planning permission PL/24/2441/FA (Porch extension, first floor side extension and front dormer window) to allow for amending the front dormer window to make a gable end.

  Received 8 Sep, published by the council 10 Sep 2026 Amendments