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Planning application

Charleston Paddocks St Albans Road South Mimms Potters Bar Hertfordshire EN6 3ND

Awaiting decision Hertsmere 25/1668/VOC Variation of Condition

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

Removal of condition 33 (restriction of use as a data centre) following grant of planning permission 23/1049/OUT.

As published by the council, reference 25/1668/VOC

Application record

Reference
25/1668/VOC
Type
Variation of Condition
Status
Awaiting decision
Received
21 Nov 2025
Validated
21 Nov 2025
Ward
Shenley
Parish
The Parish Council South Mimms And Ridge
Postcode
EN6 3ND

Site history

Applications at this address on the Hertsmere register

This site has had 10 applications since 2025: 2 approved, 0 refused.

  • 26/1017/DOC Awaiting decision

    Charleston Paddocks St Albans Road South Mimms Potters Bar Hertfordshire EN6 3ND

    Application for approval of details reserved by condition 19 (Geotechnical submissions) of planning permission reference 23/1049/OUT.

    Submitted 22 Jul 2026 Conditions
  • 26/0927/DOC Decided

    Charleston Paddocks St Albans Road South Mimms Potters Bar Hertfordshire EN6 3ND

    Application for approval of details reserved by condition 31 (Construction Environmental Management Plan) of planning permission reference 23/1049/OUT.

    Decided 13 Aug 2026 Conditions
  • 26/0926/DOC Awaiting decision

    Charleston Paddocks St Albans Road South Mimms Potters Bar Hertfordshire EN6 3ND

    Application for approval of details reserved by conditions 20 (communications strategy) of planning permission reference 23/1049/OUT.

    Submitted 7 Jul 2026 Conditions
  • 26/0904/DOC Decided

    Charleston Paddocks St Albans Road South Mimms Potters Bar Hertfordshire EN6 3ND

    Application for approval of details reserved by condition 24 (Groundwater Contamination/Piling) of planning permission reference 23/1049/OUT.

    Decided 11 Aug 2026 Conditions
  • 26/0903/DOC Awaiting decision

    Charleston Paddocks St Albans Road South Mimms Potters Bar Hertfordshire EN6 3ND

    Application for approval of details reserved by conditions 17 (Construction Traffic Management Plan) and 21 (Site Waste Management Plan) of planning permission reference 23/1049/OUT.

    Submitted 30 Jun 2026 Conditions
  • 26/0868/DOC Decided

    Charleston Paddocks St Albans Road South Mimms Potters Bar Hertfordshire EN6 3ND

    Application for approval of details reserved by condition 34 (Training & Employment Management Strategy) of planning permission reference 23/1049/OUT.

    Decided 30 Oct 2026 Conditions
  • 26/0573/DOC Granted

    Charleston Paddocks St Albans Road South Mimms Potters Bar Hertfordshire EN6 3ND

    Application for approval of details reserved by condition 30 (Biodiversity Net Gain Management plan) of planning permission reference 23/1049/OUT.

    Decided 13 Aug 2026 Conditions
  • 25/1502/DOC Granted

    Charleston Paddocks St Albans Road South Mimms Potters Bar Hertfordshire EN6 3ND

    Application for approval of details reserved by conditions 8 (public rights of way) of planning permission reference 23/1049/OUT.

    Decided 11 Aug 2026 Conditions
  • 25/0526/DOC Awaiting decision

    Charleston Paddocks St Albans Road South Mimms Potters Bar Hertfordshire EN6 3ND

    Application for approval of details reserved by conditions 11 (Contaminated land 1), 12 (Contaminated land 2), 22 (Groundwater Contamination Condition 3) and 23 (Groundwater Contamination Condition 4) of planning permission reference 23/1049/OUT.

    Submitted 2 Apr 2025 Conditions

Timeline

Dates from the published record

  1. 21 Nov 2025

    Received by Hertsmere

  2. 24 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 16 January 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

    Hertsmere took a median of 56 days over the applications it decided in the last year.

Cases linked to this one on the register

  • Application: 23/1049/OUT (Decided)

Who's behind it

Company information only, from the register and Companies House

Twenty5 Planning Ltd Agent, a planning consultancy registered in Cambridge

Active · incorporated 2025 · Cambridge

50 applications on PlanIndex · across 18 councils · 94% 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

Railway Pension Nominees Ltd Applicant, registered in London

Active · incorporated 1969 · London

16 applications on PlanIndex · across 3 councils · 100% 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

22 documents on file for this application

  • Local lead flood authority comments Consultee replies · 17 Mar 2026
  • Built heritage response Consultee replies · 19 Dec 2025
  • Affinity water response Consultee replies · 18 Dec 2025
  • Consultee comment submitted online Consultee Comment · 17 Dec 2025
  • Pselsc response Consultee replies · 16 Dec 2025
  • Consultee comment submitted online Consultee Comment · 15 Dec 2025
  • National highways comments Consultee replies · 15 Dec 2025
  • Consultee comment submitted online Consultee Comment · 11 Dec 2025
  • Consultee comment submitted online Consultee Comment · 11 Dec 2025
  • Psear response Consultee replies · 09 Dec 2025
  • Archaeological response Consultee replies · 08 Dec 2025
  • Met office response Consultee replies · 04 Dec 2025
  • Highways response Consultee replies · 03 Dec 2025
  • Climate change response Consultee replies · 02 Dec 2025
  • Ecology response Consultee replies · 01 Dec 2025
  • Active travel england response Consultee replies · 01 Dec 2025
  • Hcc growth and infrastructure comments Consultee replies · 27 Nov 2025
  • Historic england response Consultee replies · 26 Nov 2025
  • Heathrow airport response Consultee replies · 26 Nov 2025
  • Application form redacted Application Form · 21 Nov 2025
  • Data centre needs assessment Supporting Documents · 21 Nov 2025
  • South mimms planning statement Supporting Documents · 21 Nov 2025

Watch members (£5 a month) open the document list from here.

Open the documents

What happens while it is decided

This application is with Hertsmere for determination, against a statutory target of eight weeks. Over the last year Hertsmere decided amendment applications in a median of 68 days. More in our guide to how long planning decisions take.

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

In Hertsmere

  • 26/1492/VOC Decided

    14 Watford Road Radlett Hertfordshire WD7 8LD

    Variation of condition 2 (plans) to allow for retention of the existing detached garage structure to the front of the site, for conversion to a refuse store and concierge office and enlargement of the basement to the rear to accommodate a gym/leisure facility and shower/sauna rooms following grant of planning permission 24/0115/FUL.

    Received 16 Oct, published by the council 21 Oct 2026 Amendments
  • 26/1531/VOC Awaiting decision

    74 Cranborne Road Potters Bar Hertfordshire EN6 3AJ

    Variation of condition 2 (plans) to allow for roof alterations, alterations to the garden openings and replace the render finish with a cladding finish following grant of planning permission 21/2038/HSE.

    Received 21 Oct, published by the council 28 Oct 2026 Amendments
  • 26/1509/VOC Awaiting decision

    Cutters Barn The Warren Radlett Hertfordshire WD7 7DU

    Variation of conditions 2 (approved plans and drawings) and 4 (Arboricultural Impact Assessment) to allow for alterations to the proposed tree strategy following grant of planning permission 25/0857/HSE.

    Received 19 Oct, published by the council 21 Oct 2026 Amendments
  • 26/1228/VOC Decided

    31 The Avenue Radlett Hertfordshire WD7 7DQ

    Variation of condition 2 (plans) to allow for replacement of approved drawings following grant of planning permission reference 26/0006/HSE.

    Received 26 Aug, published by the council 2 Sep 2026 Amendments
  • 26/0989/VOC Decided

    Fields Theobald Street Radlett Hertfordshire WD7 7LS

    Variation of condition 13 (bus stops) to allow for changes from a pre-commencement to a pre-occupation condition and to upgrade alternative bus stops following grant of planning permission 25/1379/OUT.

    Received 17 Jul, published by the council 26 Jul 2026 Amendments