50 Springhill Road Grendon Underwood Buckinghamshire HP18 0TE

1. 3 Jul 2026

   Validated

   Checked as complete and ready for consideration.

2. 3 Aug 2026

   Added to PlanIndex

3. 10 Aug 2026

   Status changed to Decided

   Previously Registered.

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.

• Land Adjacent To HMP Grendon Springhill Springhill Road Grendon Underwood HP18 0TL

  PL/26/07050/CONDA Submitted 2 Sep 2026 350 yards away

  86% historically approved · decision due ~28 Oct

  Approval of details subject to condition 2 (materials) of approval ref. 25/02292/ADP

  Awaiting decision 8 docs

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

  PL/25/5758/MDLA Submitted 20 Nov 2025 400 yards 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/25/4864/SA Submitted 23 Oct 2025 0.3 miles 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/26/01955/NMA Submitted 10 Mar 2026 0.3 miles 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 0.3 miles 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 0.3 miles 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

• 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