Planning application
26/00571/FULL
3 West Halkin Street London SW1X 8JJ
Proposal
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.
As published by the council, reference 26/00571/FULL
Timeline
Dates from the published record
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2 Feb 2026
Received by Westminster
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21 Jul 2026
Added to PlanIndex
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Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What happens while it is decided
The process from here
This application is with Westminster for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
About full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
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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.
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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)
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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)
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25/06480/LBC Granted
1 West Halkin Street London SW1X 8JJ
Internal alterations consisting of the installation of two passenger lifts connecting lower ground to first floor and first to second floor levels.
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25/08069/FULL Awaiting decision
Flat 5 6 West Halkin Street London SW1X 8JA
Alterations to existing flat roof to form roof terrace at third floor level including replacement of one glazed opening to the rear elevation with glazed access door; installation of terrace deck, privacy screening and planting.
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25/08070/LBC Awaiting decision
Flat 5 6 West Halkin Street London SW1X 8JA
Alterations to existing flat roof to form roof terrace at third floor level including replacement of one glazed opening to the rear elevation with glazed access door; installation of terrace deck; privacy screening and planting.
Other full applications applications
In Westminster
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26/04824/ADFULL Granted
New Zealand House 80 Haymarket London SW1Y 4TE
Detailed design and specification of new blinds to NZH based on mock-up trials on-site. pursuant to condition 32 (i) of planning permission dated 8th April 2024 (23/00571/FULL).
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26/04829/ADFULL Granted
New Zealand House 80 Haymarket London SW1Y 4TE
Details of external and internal signage strategy pursuant to Condition 33(E) of planning permission dated 8th April 2024 (RN: 23/00571/FULL)
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26/04841/ADFULL Granted
29 Henstridge Place London NW8 6QD
Details of the facing materials you will use, including glazing, and elevations and roof plans annotated to show where the materials are to be located pursuant to condition 5 of planning permission dated 18th November 2025 (RN:25/06159).
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26/04989/FULL Awaiting decision
1 Kildare Terrace London W2 5JT
Erection of a mansard roof extending over the main house and side wing, replacement lower ground rear extension with roof terrace above, lowering of lower ground floor slab, installation of an air source heat pump in rear garden, new front boundary treatment, and new second floor window on the north elevation.
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26/04986/FULL Awaiting decision
Inver Court Inverness Terrace London W2 6JB
Replacement of combustible materials in the render facades; timber decking and plastic soffits/ fascias to terraces with non-combustible materials on the 5th and 6th floors.