20 Carlton House Terrace London SW1Y 5AN

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

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

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.

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.

• 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

• 26/07528/FULL Awaiting decision

  69 Eaton Place London SW1X 8DF

  Installation of new cast iron water pipe on rear courtyard elevation. (Linked with 26/07529/LBC)

  Received 5 Nov, published by the council 6 Nov 2026 Full applications
• 26/05200/FULL Decided

  1 The Court House 165 Seymour Place London W1H 4PU

  Installation of waterproofing system to the existing lead flat roofs

  Received 3 Aug, published by the council 28 Aug 2026 Full applications
• 26/07521/FULL Awaiting decision

  Flat 18 Harlequin Court 20 Tavistock Street London WC2E 7NZ

  Installation of one external condenser unit

  Received 4 Nov, published by the council 6 Nov 2026 Full applications
• 26/07508/FULL Awaiting decision

  Buckingham Palace The Mall London SW1A 1AA

  Replacement of existing security lighting to the Buckingham Palace Forecourt with 80 compact LED spotlights installed within the lantern clusters across 10 principal piers, with associated concealed cabling and reversible fixings. (Linked with 26/07509/LBC)

  Received 4 Nov, published by the council 5 Nov 2026 Full applications
• 26/07472/FULL Awaiting decision

  Flat 3 82 New Cavendish Street London W1G 9TA

  Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07473/LBC)

  Received 3 Nov, published by the council 6 Nov 2026 Full applications