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Planning application

20 Carlton House Terrace London SW1Y 5AN

Granted Westminster 25/05651/FULL Full Planning Permission Application

Works: Windows or glazing

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Retention of pergola structure at L8 terrace, new bi-fold doors at L8 terrace and new louvres at ground floor level fronting Cockspur Court and Warwick House Street.

As published by the council, reference 25/05651/FULL

Application record

Reference
25/05651/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
12 Aug 2025
Validated
18 Sep 2025
Decided
4 Nov 2025
Ward
St James's
Decision by
Delegated Decision
Postcode
SW1Y 5AN

Site history

Applications at this address on the Westminster register

This site has had 6 applications since 2022: 6 approved, 0 refused.

  • 25/06975/FULL Granted

    20 Carlton House Terrace London SW1Y 5AN

    Installation of external lighting to the eighth and tenth floor terraces.

    Decided 20 Nov 2025 Full applications
  • 25/06152/ADFULL Granted

    20 Carlton House Terrace London SW1Y 5AN

    Details of manufacturer's specification of light fittings (labelled FL1-DZ4, F1-D27 on the Carlton House Terrace elevation, F3-DZ14 on the Warwick House Street elevation and F2-DZ10 and F2-DZ9 on the Cockspur Court Facade) pursuant to condition 5 of planning permission dated 04 November 2024 (RN: 24/01754/FULL).

    Decided 9 Sep 2025 Full applications
  • 25/05797/ADFULL Granted

    20 Carlton House Terrace London SW1Y 5AN

    Detailed design of the of entrance doors to the basement car park area including the vehicular entrance and exit to the basement car park area; and new staircase to Cockspur Court pursuant to Condition 9 (iv and vi) (partial) of planning permission dated 28 July 2023 (RN 23/02725/FULL).

    Decided 29 Aug 2025 Full applications
  • 25/05734/FULL Granted

    20 Carlton House Terrace London SW1Y 5AN

    Amendments to the glazed pavilion at tenth floor terrace level.

    Decided 26 Sep 2025 Full applications
  • 22/05594/ADFULL Granted

    20 Carlton House Terrace London SW1Y 5AN

    Details of Appendix A from Code of Construction Practice pursuant to Condition 3 of planning permission dated 30 March 2022 (21/07642/FULL).

    Decided 26 Aug 2022 Full applications

Timeline

Dates from the published record

  1. 12 Aug 2025

    Received by Westminster

  2. 18 Sep 2025

    Validated

    Checked as complete and ready for consideration.

  3. 4 Nov 2025

    Decision issued: Application Permitted

  4. 21 Jul 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

DP9 Ltd Agent

Active · incorporated 2004

2,153 applications on PlanIndex · across 37 councils · 98% 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

33 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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What this grant of permission means

Westminster granted permission on 4 November 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.

About full applications

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 20 Carlton House Terrace London SW1Y 5AN

    25/06152/ADFULL Submitted 29 Aug 2025 50 yards away

    Details of manufacturer's specification of light fittings (labelled FL1-DZ4, F1-D27 on the Carlton House Terrace elevation, F3-DZ14 on the Warwick House Street elevation and F2-DZ10 and F2-DZ9 on the Cockspur Court Facade) pursuant to condition 5 of planning permission dated 04 November 2024 (RN: 24/01754/FULL).

    Granted Full applications 10 docs

  • 20 Carlton House Terrace London SW1Y 5AN

    22/05594/ADFULL Submitted 16 Aug 2022 50 yards away

    Details of Appendix A from Code of Construction Practice pursuant to Condition 3 of planning permission dated 30 March 2022 (21/07642/FULL).

    Granted Full applications 6 docs

  • 20 Carlton House Terrace London SW1Y 5AN

    25/05797/ADFULL Submitted 15 Aug 2025 50 yards away

    Detailed design of the of entrance doors to the basement car park area including the vehicular entrance and exit to the basement car park area; and new staircase to Cockspur Court pursuant to Condition 9 (iv and vi) (partial) of planning permission dated 28 July 2023 (RN 23/02725/FULL).

    Granted Full applications 13 docs

  • 14 - 16 Cockspur Street London SW1Y 5BL

    26/01960/RESMAT Submitted 25 Mar 2026 50 yards away

    89% historically approved · decision due ~20 May

    Details of how waste is to be stored on site and how materials for recycling will be stored separately. You must not operate the consular service hereby approved as part of the continued embassy use (sui generis) until we have approved what you have sent us. You must then provide the waste and recycling storage prior to occupation of the development and thereafter permanently retain the stores according to these details. You must clearly mark them and make them available at all times to everyone using the embassy (sui generis). You must not use the waste and recycling store for any other purpose.

    Awaiting decision 7 docs

  • 14 - 16 Cockspur Street London SW1Y 5BL

    25/08516/ADFULL Submitted 20 Nov 2025 50 yards away

    Details of cycle storage pursuant to Condition 4 of planning permission dated 1 September 2025 (RN: 25/04681/FULL)

    Granted Full applications 6 docs

  • 14 - 16 Cockspur Street London SW1Y 5BL

    25/08517/RESMAT Submitted 20 Nov 2025 50 yards away

    Details of how waste is to be stored on site and how materials for recycling will be stored separately, pursuant to Condition 3 of planning permission dated 1 September 2025 (RN 25/04681/FULL)

    Refused 5 docs

In Westminster

  • 26/06295/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Installation of a new shopfront.

    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06297/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Alterations to rear elevation at basement level comprising repolacement window and installation of double opening door.

    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06287/FULL Awaiting decision

    Barness Court 6 - 8 Westbourne Terrace London W2 3UW

    Installation of a new riser as per GW10 design comprising a single riser with 7 entries and 9 Taylor valves to be installed. (Linked with 26/06288/LBC)

    Received 14 Sep, published by the council 21 Sep 2026 Full applications
  • 26/06278/FULL Awaiting decision

    40 Wellington Road London NW8 9TJ

    Installation of a new external access ramp/slope to provide accessibility to the Barclays bank ATM.

    Received 14 Sep, published by the council 21 Sep 2026 Full applications
  • 26/06269/FULL Awaiting decision

    Maisonette Basement And Ground Floor 101 Hereford Road London W2 5BB

    Amalgamation of existing lower ground and ground floor maisonette with the first floor flat to create a single dwelling and associated internal works including creation of a staircase. (Linked with 26/06270/LBC)

    Received 14 Sep, published by the council 21 Sep 2026 Full applications