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Planning application

HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

Decided Buckinghamshire PL/25/3029/NMA Non Material Amendment

Decided. The decision notice on the council portal carries the outcome in full, including any conditions.

Proposal

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)

As published by the council, reference PL/25/3029/NMA

Application record

Reference
PL/25/3029/NMA
Type
Non Material Amendment
Status
Decided
Decision
Non material amendt-accepted
Received
20 Aug 2025
Validated
20 Aug 2025
Decided
30 Sep 2025
Ward
Grendon Underwood and The Claydons
Parish
Grendon Underwood
Decision by
Delegated Decision
Postcode
HP18 0TL

Site history

Applications at this address on the Buckinghamshire register

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/25/2997/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

Timeline

Dates from the published record

  1. 20 Aug 2025

    Received by Buckinghamshire

  2. 30 Sep 2025

    Decision issued: Non material amendt-accepted

  3. 12 Aug 2026

    Added to PlanIndex

  4. 15 Aug 2026

    Status changed to Registered

    Previously Decided.

Who's behind it

Company information only, from the register and Companies House

Agent on file

162 applications on PlanIndex · across 59 councils · 97% granted

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Documents

Plans, drawings, consultee responses and the officer's report

4 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

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After the decision

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.

About amendment applications

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.

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Within 500 metres

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