Planning application
26/03883/LBC
17 - 21 South Audley Street London W1K 2NY
Proposal
Alteration and extension of existing buildings including removal of one single storey extensions and one part single and part two storey extension, erection of infill extensions at first to third floor levels, a replacement part single storey and part three storey side extension adjoining Mount Street Garden and a replacement single storey extension fronting onto South Street, creation of terraces at first floor level within a central greened courtyard, installation of plant and associated external alterations. Installation of lightning protection, satellite dishes and tv aerial replacement of roof coverings including battens, sarking boards and installation of insultation, ventilation, ply sheathing and other associated work the removal and rebuilding of a leaning chimney stack and associated structural work to existing roof Internal alterations throughout [Site includes 22 South Audley Street, 35 South Street and 35A South Street]. (Linked with 26/03942/FULL)
As published by the council, reference 26/03883/LBC
Timeline
Dates from the published record
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12 Jun 2026
Received by Westminster
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16 Jun 2026
Validated
Checked as complete and ready for consideration.
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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 heritage and listed buildings applications
How this application type works
Heritage applications concern listed buildings and conservation areas. Listed building consent is needed for works, inside or out, that affect the special interest of a listed building, and carrying out such works without consent is a criminal offence. The council weighs harm to the heritage asset against any public benefit of the proposal.
More on heritage and listed buildings applications in our guide
Nearby applications
Within 500 metres
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26/03852/LBC Awaiting decision
17 - 21 South Audley Street London W1K 2NY
Installation of services at ground and lower ground floor, and works to ground floor structure.
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26/03942/FULL Awaiting decision
17 - 21 South Audley Street London W1K 2NY
Variation of Condition 1 of planning permission dated 13th March 2026 (RN: 25/03446/FULL) for 'Alteration and extension of existing buildings including removal of one single storey extensions and one part single and part two storey extension, erection of infill extensions at first to third floor levels, a replacement part single storey and part three storey side extension adjoining Mount Street Garden and a replacement single store extension fronting onto South Street, use of part lower ground and part ground floor levels as an art gallery with ancillary storage and office accommodation (Class E), use of part basement/lower ground , part ground floor and first to fourth floor levels to aparthotel to provide 10 visitor accommodation units (Class C1) with ancillary facilities at ground and lower ground floor level, including communal lounge/library at ground floor level, use of ground to third floor of no.35A South Street, first and second floors of no.35 South Street and first to fourth floor of no. 17 South Audley Street as six residential units (Class C3), creation of terraces at first floor level within a central greened courtyard, installation of plant and associated external alterations'. NAMELY, minor changes to approved extension roof and courtyard heights by way of changes to build ups, alteration to part of roof to accommodate Stair 09 headroom, alteration of roof 07 to remove rooflights revisions to plant layout and screening, change to material of loading bay roof, introduction of automatic opening vents and roof access strategy, alteration of dormers, addition of roof drainage, installation of airbricks and internal layout changes. (Linked with 26/03883/LBC) (Application under Section 73 of the Act).
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26/02995/FULL Awaiting decision
17 - 21 South Audley Street London W1K 2NY
Replacement of existing Roof 01 and associated gutters including strengthening works to three retained wright iron trusses located below the existing roof; alterations to internal door opening; and other associated works. Linked with 26/02996/LBC
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26/02800/LBC Awaiting decision
17 - 21 South Audley Street London W1K 2NY
Replacement of floorboards, installation of new floor build ups (including a new plywood structural deck), and new floor finishes at ground floor level
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26/02996/LBC Awaiting decision
17 - 21 South Audley Street London W1K 2NY
Replacement of existing roof and associated gutters including strengthening works to three retained wright iron trusses located below the existing roof; alterations to internal door opening; and other associated works. Linked with 26/02995/FULL
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26/04385/LBC Awaiting decision
17 - 21 South Audley Street London W1K 2NY
Works to facilitate the installation of previously consented spiral staircases (22/05005/LBC), including the formation of structural openings and installation of associated structural supports at roof, fourth and third floor levels.
Other heritage and listed buildings applications
In Westminster
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26/04984/LBC Awaiting decision
47G Randolph Avenue London W9 1BQ
Installation of replacement fire surround.
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26/04997/LBC Awaiting decision
Hanover Lodge Outer Circle Regent's Park London NW1 4HB
Erection of a morning room side extension. (Linked to 26/04996/FULL)
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26/04979/LBC Awaiting decision
12 Brewer Street London W1F 0SF
Internal alterations including removal of internal enclosures; Replacement flooring, shelving and slatwall systems, staircase handrail repair and other associated joinery works.
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26/04987/LBC Awaiting decision
Basement And Ground Floor 8 Ganton Street London W1F 7QL
Repainting of the existing timber shopfront, hand-painted fascia lettering, installation of a new hanging sign using the existing projecting sign bracket, and installation of a discreet fascia-mounted LED trough light.
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26/04995/LBC Awaiting decision
Hanover Lodge Outer Circle Regent's Park London NW1 4HB
Erection of rear conservatory extensions and an entrance loggia to side with roof terrace above, together with associated landscaping and alterations. (Linked with 26/04994/FULL)