3 West Halkin Street London SW1X 8JJ

This site has had 4 applications since 2026.

• 26/04464/FULL Awaiting decision

  3 West Halkin Street London SW1X 8JJ

  Alterations to roof to provide a sunken plant room on the fifth floor attic space. (Linked with 26/04465/LBC)

  Submitted 6 Jul 2026 Full applications
• 26/04465/LBC Awaiting decision

  3 West Halkin Street London SW1X 8JJ

  Alterations to roof to provide a sunken plant room on the fifth floor attic space. (Linked with 26/04464/FULL)

  Submitted 6 Jul 2026 Heritage and listed buildings
• 26/00571/FULL Awaiting decision

  3 West Halkin Street London SW1X 8JJ

  Variation of condition 1 of planning permission dated 16 March 2021 (20/07145/FULL) for the use as seven residential flats (Class C3) including the installation of plant at lower ground floor level and associated external alterations. (Site includes 2 West Halkin Street); NAMELY, to vary the approved drawing numbers to allow minor internal and external amendments.

  Submitted 2 Feb 2026 Full applications

1. 30 Jan 2026

   Received by Westminster

2. 2 Feb 2026

   Validated

   Checked as complete and ready for consideration.

3. 21 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 30 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 66 days over the applications it decided in the last year.

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided heritage and listed building applications in a median of 94 days. More in our guide to how long planning decisions take.

Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.

• 3 West Halkin Street London SW1X 8JJ

  26/00571/FULL Submitted 2 Feb 2026 50 yards away

  87% historically approved · decision due ~30 Mar

  Variation of condition 1 of planning permission dated 16 March 2021 (20/07145/FULL) for the use as seven residential flats (Class C3) including the installation of plant at lower ground floor level and associated external alterations. (Site includes 2 West Halkin Street); NAMELY, to vary the approved drawing numbers to allow minor internal and external amendments.

  Awaiting decision Full applications New dwelling 14 docs

• 3 West Halkin Street London SW1X 8JJ

  26/04465/LBC Submitted 6 Jul 2026 50 yards away

  90% historically approved · decision due ~31 Aug

  Alterations to roof to provide a sunken plant room on the fifth floor attic space. (Linked with 26/04464/FULL)

  Awaiting decision Heritage and listed buildings 2 docs

• 9 Halkin Place London SW1X 8JH

  22/03778/FULL Submitted 9 Jun 2022 50 yards away

  Installation of air conditioning unit and an acoustically louvered door to the lower ground floor vault fronting Halkin Place.

  Granted Full applications 13 docs

• 3 West Halkin Street London SW1X 8JJ

  26/04464/FULL Submitted 6 Jul 2026 50 yards away

  87% historically approved · decision due ~31 Aug

  Alterations to roof to provide a sunken plant room on the fifth floor attic space. (Linked with 26/04465/LBC)

  Awaiting decision Full applications 20 docs

• 1 West Halkin Street London SW1X 8JJ

  25/06480/LBC Submitted 10 Sep 2025 50 yards away

  Internal alterations consisting of the installation of two passenger lifts connecting lower ground to first floor and first to second floor levels.

  Granted Heritage and listed buildings 12 docs

• Flat 3 Carysfort House West Halkin Street London SW1X 8JS

  26/05492/FULL Submitted 12 Aug 2026 50 yards away

  87% historically approved · decision due ~7 Oct

  Replacement of single glazed windows at the ground floor flat front elevation, with slimline double glazed windows in matching style.

  Awaiting decision Full applications Windows or glazing

• 26/04878/LBC Decided

  34 Grosvenor Street London W1K 4QU

  Internal works to facilitate the subdivision of 34 Grosvenor Street and 3 Three Kings Yard

  Received 21 Jul, published by the council 1 Aug 2026 Heritage and listed buildings
• 26/06299/LBC Awaiting decision

  Apartment 33 24 Park Crescent London W1B 1AA

  Removal of non structural partitions, replacement of non original doors with full height concealed doors.

  Received 15 Sep, published by the council 22 Sep 2026 Heritage and listed buildings
• 26/06305/LBC Awaiting decision

  33A Dean Street London W1D 4PP

  Waterproofing the basement level.

  Received 15 Sep, published by the council 22 Sep 2026 Heritage and listed buildings
• 26/04141/LBC Decided

  80E Randolph Avenue London W9 1BG

  Replacement of sashes in two front windows at 2nd floor level and one rear window with slimline double glazed timber sashes. (Linked with 26/04142/FULL)

  Received 23 Jun, published by the council 21 Jul 2026 Heritage and listed buildings
• 26/06288/LBC 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 26/06287/FULL)

  Received 14 Sep, published by the council 21 Sep 2026 Heritage and listed buildings