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Planning application

3 West Halkin Street London SW1X 8JJ

Awaiting decision Westminster 26/04464/FULL Full Planning Permission Application

Relates to 26/04465/LBC

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

Proposal

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

As published by the council, reference 26/04464/FULL

Application record

Reference
26/04464/FULL
Type
Full Planning Permission Application
Status
Pending
Received
6 Jul 2026
Validated
6 Jul 2026
Ward
Knightsbridge & Belgravia
Postcode
SW1X 8JJ

Site history

Applications at this address on the Westminster register

This site has had 4 applications since 2026.

  • 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
  • 26/00557/LBC Awaiting decision

    3 West Halkin Street London SW1X 8JJ

    Internal and external amendments including reconfiguration of partitions/retention of existing partitions; provision of accessible service risers; conservative lower ground floor/ground floor stair case design; sensitive fire safety enhancements; like-for-like replacement of non-original/ dilapidated windows with heritage appropriate timber framed windows.

    Submitted 30 Jan 2026 Heritage and listed buildings

Timeline

Dates from the published record

  1. 6 Jul 2026

    Received by Westminster

  2. 21 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 31 August 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.

Cases linked to this one on the register

  • 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

1 later application on the register refers to this one:

  • 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

Who's behind it

Company information only, from the register and Companies House

Savills Limited Agent, registered in London

Active · incorporated 1987 · London

2,189 applications on PlanIndex · across 186 councils · 92% 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

20 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.

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

Open the documents

What happens while it is decided

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 91 days. More in our guide to how long planning decisions take.

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

  • 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

  • 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

    26/00557/LBC Submitted 30 Jan 2026 50 yards away

    90% historically approved · decision due ~30 Mar

    Internal and external amendments including reconfiguration of partitions/retention of existing partitions; provision of accessible service risers; conservative lower ground floor/ground floor stair case design; sensitive fire safety enhancements; like-for-like replacement of non-original/ dilapidated windows with heritage appropriate timber framed windows.

    Awaiting decision Heritage and listed buildings Windows or glazing 15 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

  • 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

In Westminster

  • 26/06295/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Installation of a new shopfront with Medication Dispensing Outlet.

    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 replacement window and installation of double opening door.

    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06294/FULL Awaiting decision

    15 Eaton Mews South London SW1W 9HP

    Installation of railings and sliding lantern light at main roof level in connection with the use of the roof as a terrace.

    Received 15 Sep, published by the council 22 Sep 2026 Full applications
  • 26/06317/FULL Awaiting decision

    124 Hamilton Terrace London NW8 9UT

    Replacement of existing first-floor sash windows to the front and rear elevations with traditionally detailed painted timber, slim-profile double-glazed sash windows. (Linked to 26/06318/LBC)

    Received 15 Sep, published by the council 22 Sep 2026 Full applications
  • 26/06273/FULL Awaiting decision

    9A Grosvenor Square London W1K 5AE

    Installation of natural Portland Stone paving to two front entrances. (Linked to 26/05473/LBC)

    Received 14 Sep, published by the council 22 Sep 2026 Full applications