3 Carlton Gardens London SW1Y 5AA

This site has had 3 applications since 2026.

• 26/04435/TPO Awaiting decision

  3 Carlton Gardens London SW1Y 5AA

  T5 Lime - Courtyard area: Crown Reduction - To reduce the height and radial spread of the canopy by up to 3 metres, shape accordingly and remove major deadwood and trunk growth to crown break. H3 Portuguese Laurel - Hedge reduction - To reduce the height by up to 1.5 metre and to trim and shape all sides to create a more tight and compact hedge including the removal of one dead Laurel as annotated in photo. Additional bark chippings will be added to maintain moisture level to the whole hedge. To supply and plant a new Portuguesue Laurel of at least 2 metres in height. Reason for work ? General Maintenance.

  Submitted 3 Jul 2026 Trees
• 26/00375/LBC Awaiting decision

  3 Carlton Gardens London SW1Y 5AA

  Replacement of air conditioning condenser units within new acoustic enclosures in south lightwell. (Linked to 26/00374/FULL)

  Submitted 22 Jan 2026 Heritage and listed buildings

1. 22 Jan 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 19 March 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Westminster took a median of 91 days over the applications it decided in the last year.

• 26/00375/LBC Awaiting decision

  3 Carlton Gardens London SW1Y 5AA

  Replacement of air conditioning condenser units within new acoustic enclosures in south lightwell. (Linked to 26/00374/FULL)

  Submitted 22 Jan 2026 Heritage and listed buildings

1 later application on the register refers to this one:

• 26/00375/LBC Awaiting decision

  3 Carlton Gardens London SW1Y 5AA

  Replacement of air conditioning condenser units within new acoustic enclosures in south lightwell. (Linked to 26/00374/FULL)

  Submitted 22 Jan 2026 Heritage and listed buildings

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided full applications in a median of 119 days. More in our guide to how long planning decisions take.

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.

• 3 Carlton Gardens London SW1Y 5AA

  26/00375/LBC Submitted 22 Jan 2026 50 yards away

  90% historically approved · decision due ~19 Mar

  Replacement of air conditioning condenser units within new acoustic enclosures in south lightwell. (Linked to 26/00374/FULL)

  Awaiting decision Heritage and listed buildings 21 docs

• 1 Carlton House Terrace London SW1Y 5AF

  25/05079/NMA Submitted 22 Jul 2025 50 yards away

  Variation of condition 1 of planning permission dated 28 April 2021 (RN: 21/01191/FULL) which itself varied condition 1 of planning permission dated 28 August 2020 (RN: 20/04449/FULL) which itself varied condition 1 of planning permission dated 09 April 2020 (RN: 20/00755/FULL) for use of the building as a single residential dwelling (Class C3) with associated internal and external alterations including erection of a sun room with terrace at roof level, partial infill of rear lightwell at basement level and car port enclosure. NAMELY, to remove the list of approved drawings from the operative part of the decision notice of RN: 21/01191/FULL and to insert them within Condition 1.

  Granted Amendments Extension 8 docs
  Domestic

• 3 Carlton Gardens London SW1Y 5AA

  26/04435/TPO Submitted 3 Jul 2026 50 yards away

  100% historically approved · decision due ~28 Aug

  T5 Lime - Courtyard area: Crown Reduction - To reduce the height and radial spread of the canopy by up to 3 metres, shape accordingly and remove major deadwood and trunk growth to crown break. H3 Portuguese Laurel - Hedge reduction - To reduce the height by up to 1.5 metre and to trim and shape all sides to create a more tight and compact hedge including the removal of one dead Laurel as annotated in photo. Additional bark chippings will be added to maintain moisture level to the whole hedge. To supply and plant a new Portuguesue Laurel of at least 2 metres in height. Reason for work ? General Maintenance.

  Awaiting decision Trees

• 1 Carlton House Terrace London SW1Y 5AF

  26/06813/ADLBC Submitted 6 Oct 2026 50 yards away

  89% historically approved · decision due ~1 Dec

  Details of fixings for the lift mechanism pursuant to discharge of condition 4 of listed building consent dated 28th April 2021 (21/01154/LBC)

  Withdrawn

• 1 Carlton House Terrace London SW1Y 5AF

  26/06814/ADLBC Submitted 6 Oct 2026 50 yards away

  89% historically approved · decision due ~1 Dec

  Details of fixings for the lift mechanism pursuant to discharge of condition 5 (part i) of listed building consent dated 4th August 2026 (RN: 25/04929/LBC).

  Awaiting decision

• 1 Carlton House Terrace London SW1Y 5AF

  26/06575/ADLBC Submitted 24 Sep 2026 50 yards away

  89% historically approved · decision due ~1 Dec

  Details of the fixings into historic fabric at 1:10 or 1:5 for the proposed trellis and mirrors at the internal lightwell pursuant to discharge of condition 8 of listed building consent dated 12th March 2025 (RN: 25/00124/LBC).

  Withdrawn

• 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