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/25/4863/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
• PL/25/2997/CONDA Decided

  HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

  Approval of condition 36 (Piling Method Statement) 38 (Proposed Slab Levels Plan) of planning application 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 )

  Decided 13 Oct 2025 Conditions

1. 23 Oct 2025

   Received by Buckinghamshire

2. 17 Dec 2025

   Decision issued: Cert of Law PROPOSED-granted

3. 10 Aug 2026

   Added to PlanIndex

Buckinghamshire granted permission on 17 December 2025, 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.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. 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 29m 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 29m 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 29m 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/25/2838/MDLA Submitted 14 Aug 2025 55m away

  84% 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 59m 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 107m 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/26/05794/SA Awaiting decision

  62 Cubb Field Aylesbury Buckinghamshire HP19 7SH

  Certificate of lawfulness for proposed dropped kerb

  10 Aug 2026 Lawful development
• PL/26/01164/SA Refused

  64 Sandholme Steeple Claydon Buckinghamshire MK18 2QE

  Certificate of lawfulness for proposed dropped kerb.

  12 Feb 2026 Lawful development
• PL/26/01589/SA Refused

  3 Corn Mill Close Wing Buckinghamshire LU7 0PL

  Certificate of lawfulness for the proposed single storey rear extension and part garage conversion.

  25 Feb 2026 Lawful development
• PL/26/05893/SA Awaiting decision

  Stamford House Boston Drive Bourne End Buckinghamshire SL8 5YS

  Certificate of Lawfulness for proposed development to confirm the lawfulness of the construction of first floor rear extension, creating additional open plan offices.

  22 Jul 2026 Lawful development
• PL/26/01721/SA Granted

  Burton House White Lion Road Little Chalfont Buckinghamshire HP7 9LP

  Certificate of lawfulness for the proposed change of use of building from Existing Office Building (Class E) to Veterinary Practice (Class E).

  2 Mar 2026 Lawful development