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Planning application

HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

Decided Buckinghamshire PL/26/01955/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 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.

As published by the council, reference PL/26/01955/NMA

Application record

Reference
PL/26/01955/NMA
Type
Non Material Amendment
Status
Decided
Decision
Non material amendt-accepted
Received
10 Mar 2026
Validated
10 Mar 2026
Decided
2 Apr 2026
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/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
  • 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. 10 Mar 2026

    Received by Buckinghamshire

  2. 2 Apr 2026

    Decision issued: Non material amendt-accepted

  3. 3 Aug 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Cushman & Wakefield LLP Agent

225 applications on PlanIndex · across 75 councils · 97% granted

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

See their track record

Documents

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

5 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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Open the documents

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.

Nearby applications

Within 0.3 miles

  • 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/25/4864/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/25/2838/MDLA Submitted 14 Aug 2025 50 yards 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 100 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/25/3615/NMA Submitted 10 Sep 2025 100 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

In Buckinghamshire

  • PL/26/09107/NMA Awaiting decision

    3 Aveling Road High Wycombe Buckinghamshire HP13 6AE

    Non material amendment to planning permission 23/07799/FUL (Householder application for proposed construction of part single, part double storey rear extension including internal changes, change of existing tiles to original dark slate tiles and reinstatement of front chimney) to allow for the addition of five solar panels to south facing roof of the property.

    Amendments
  • PL/26/08952/NMA Awaiting decision

    Kimble Gregories Farm Lane Beaconsfield Buckinghamshire HP9 1HJ

    Non-material amendment to planning permission PL/26/03766/FA (Replacement self build dwelling, with amendments to access to private road to allow widening) to allow for changes to windows

    Amendments
  • PL/26/08960/NMA Awaiting decision

    2 Malthouse Square Beaconsfield Buckinghamshire HP9 2LD

    Non material amendment to planning permission PL/26/06498/FA (single storey rear extension with link to garage) to allow for the addition of a velux window to ground floor bathroom.

    Amendments
  • PL/26/08769/NMA Awaiting decision

    16 Carrington Avenue Flackwell Heath Buckinghamshire HP10 9AL

    Non material amendment to planning permission 24/05431/FUL (Householder application for demolition of an existing rear conservatory and detached garage and construction of roof extensions/alterations and construction of front, rear, side extensions) to allow for the addition to an open porch to entrance door and fenestration amendments including the omission of Juliet balcony and playroom flush rooflight.

    Amendments
  • PL/26/08772/NMA Awaiting decision

    22 Fremantle Road High Wycombe Buckinghamshire HP13 7PQ

    Non-material amendment to permission for (Demolition of dwelling and detached garage and construction of detached dwelling) granted under planning reference PL/26/06331/FA to allow for alterations to proposed openings on rear elevation

    Amendments