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HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL

PL/26/04040/NMANon Material AmendmentAwaiting decision
Discharge / amendments

Proposal

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 reflect changes to GCN license

Received
15 May 2026
Decision due
12 June 2026
Decision level
Delegated (officer decision)
Ward
Grendon Underwood and The Claydons
  1. Received15 May
  2. Validated15 May
  3. Consult.
  4. Target12 Jun
  5. Decided

Have your say

Comment on the council's siteDocuments (6)

About this application

This is an application to amend a permission at HM Prison Grendon Springhill Road Grendon Underwood Buckinghamshire HP18 0TL. Buckinghamshire has handled 260 applications of this type. It has been with the council since 15 May 2026 and is still awaiting a decision. There have been 7 other applications at this address. In the past year there have been 116 applications across Grendon Underwood and The Claydons. We hold 2,252 applications in total for the HP18 postcode area.

70% of amendment applications at Buckinghamshire Council were approved. Across all application types, the council typically decides in about 8 weeks (median).

Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street

Application details

Postcode
HP18 0TL
Application type
Non Material Amendment
Scale / size
Small
Parish
Grendon Underwood

Planning application dates

Date validated
15 May 2026

Applicant and agent

Agent
Cushman & Wakefield
Agent address
St Paul's House 23 Park Square South Leeds LS1 2ND

Planning decision

Statutory period
28 days

Additional information

Documents
6

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations at the address point. Ones next to the site may also apply.

  • Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (24)

flood storage areas, conservation areas, listed buildings, Article 4 directions, tree preservation orders, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, Heritage at Risk entries, nutrient neutrality catchments, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, ancient woodland, national nature reserves, local nature reserves, heritage coasts and brownfield registers.

A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.

Data © Crown copyright and others · sources and licences

Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.

© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.

© Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026.

© Environment Agency copyright and/or database right 2026. All rights reserved. Flood Map for Planning, Open Government Licence v3.0.

Contains Ordnance Survey data © Crown copyright and database right 2026.

Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.

Planning history at this site

5 other applications at this property, newest first.

  1. 2026
    15 Apr

    Application for approval of details subject to condition 32 (land contamination) of planning approval…

    PendingDischarge of conditionsPL/26/03115/CONDA
  2. 2026
    15 Apr

    Application for approval of details subject to condition 10 (CTMP) of planning approval 21/02851/AOP

    PendingDischarge of conditionsPL/26/03123/CONDA
  3. 2026
    10 Mar

    Proposed non-material amendment to planning permission 21/02851/AOP

    PendingNon-material amendmentPL/26/01955/NMA
  4. 2025
    19 Dec

    Application for approval of details subject to condition 37 (surface water drainage) relating to Planning…

    PendingDischarge of conditionsPL/25/6622/CONDA
  5. 2025
    23 Oct

    Certificate of Lawfulness for proposed creation of temporary haul road for construction

    ApprovedCertificate of Lawful Use - ProposedPL/25/4864/SA

Source: Buckinghamshire

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