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Planning application

17 - 21 South Audley Street London W1K 2NY

Awaiting decision Westminster 26/03942/FULL Full applications

Works: Extension Loft or dormer Small domestic

Read from the description, not a valuation. How we read the register

Relates to 26/03883/LBC

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

Proposal

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).

As published by the council, reference 26/03942/FULL

Application record

Reference
26/03942/FULL
Category
Full applications
Status
Pending
Received
16 Jun 2026
Validated
16 Jun 2026
Postcode
W1K 2NY

Site history

Applications at this address on the Westminster register

This site has had 80 applications since 2023: 13 approved, 0 refused.

  • 26/06322/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Detailed drawings (scale 1:20 and 1:5) with method statements where indicated; of the new stairs, banisters and handrails and or associated junctions pursuant to condition 6 (part 11) of listed building dated 14th March 2023 (RN: 22/05005/LBC)

    Submitted 15 Sep 2026
  • 26/06159/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Details of new and retained floor, ceiling and wall construction and coverings; reflected ceiling plans; existing wall paintings, cornices and new skirting and cornices pursuant to condition 6 (parts 2,10,12, and 13) of listed building consent dated 14 March 2023 (RN: 22/05005/LBC).

    Submitted 9 Sep 2026
  • 26/06145/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Details of detailed existing and proposed elevation drawings pursuant to condition 13 of listed building dated 14th March 2023 (RN: 22/05005/LBC)

    Submitted 8 Sep 2026
  • 26/05846/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Detailed drawings (scale 1:20 and 1:5) with method statements where indicated; of the new coordinated service routes generally, showing distribution and proposed impact on existing historic fabric e.g. joists, floor construction, ventilation, wall and ceilings pursuant to Condition 6.6 of listed building dated 14.03.2023 (RN:22/05005/LBC)

    Submitted 25 Aug 2026
  • 26/05839/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Details of a windows condition survey, with a method statement for the repair, refurbishment, retention, and replacement of windows (where demonstrated to be necessary), pursuant to Condition 12.1 of listed building dated 14th March 2023 (RN:22/05005/LBC)

    Submitted 25 Aug 2026
  • 26/05845/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Details of detailed existing and proposed internal elevations for the ground floor galleries within the development pursuant to condition 13 of listed building dated 14th March 2023 (RN:22/05005/LBC)

    Submitted 25 Aug 2026
  • 26/05784/ADLBC Decided

    17 - 21 South Audley Street London W1K 2NY

    Details of new external doors each type showing location and given key details with adjacent fabric pursuant to Condition 5.4 of listed building consent dated 14th March 2023 (RN:22/05005/LBC).

    Submitted 24 Aug 2026
  • 26/05760/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Detailed drawings (scale 1:20 and 1:5) with method statements where indicated; of the new and retained floor, ceiling and wall construction and coverings with detailed build ups and locations proposed impact on existing historic fabric e.g. joists, floor construction pursuant to condition 6 (2) of listed building dated 14th March 2023 (RN:22/05005/LBC)

    Submitted 21 Aug 2026
  • 26/05753/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Details of plaster condition survey with a method statement for the repair of plasterwork or its replacement where demonstrated to be necessary; pursuant to condition 12 (part 3) of Listed Building Consent dated 14th March 2023 (22/05005/LBC)

    Submitted 21 Aug 2026
  • 26/05755/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Details of plaster condition survey with a method statement for the repair of plasterwork or its replacement where demonstrated to be necessary; pursuant to condition 12 (part 3) of Listed Building consent dated 14th March 2023 (22/05005/LBC)

    Submitted 21 Aug 2026

Timeline

Dates from the published record

  1. 16 Jun 2026

    Received by Westminster

  2. 21 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 11 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

  • 26/03883/LBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    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)

    Submitted 12 Jun 2026 Heritage and listed buildings

1 later application on the register refers to this one:

  • 26/03883/LBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    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)

    Submitted 12 Jun 2026 Heritage and listed buildings

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

  • 17 - 21 South Audley Street London W1K 2NY

    26/05784/ADLBC Submitted 24 Aug 2026 50 yards away

    89% historically approved · decision due ~19 Oct

    Details of new external doors each type showing location and given key details with adjacent fabric pursuant to Condition 5.4 of listed building consent dated 14th March 2023 (RN:22/05005/LBC).

    Decided

  • 17 - 21 South Audley Street London W1K 2NY

    26/04164/ADLBC Submitted 23 Jun 2026 50 yards away

    89% historically approved · decision due ~18 Aug

    Detailed drawings at 1:10 of the reconstructed dormer on the west elevation pursuant to condition 2 (A) of listed building dated 30th April 2026 (RN:26/01378/LBC)

    Decided Loft or dormer

  • 17 - 21 South Audley Street London W1K 2NY

    26/04126/ADFULL Submitted 23 Jun 2026 50 yards away

    89% historically approved · decision due ~18 Aug

    Detailed drawings at 1:10 of the reconstructed dormer on the west elevation pursuant to condition 12 (A) of planning permission dated 30th April 2026 (RN:26/01377/FULL)

    Decided Loft or dormer

  • 17 - 21 South Audley Street London W1K 2NY

    26/04893/ADLBC Submitted 21 Jul 2026 50 yards away

    89% historically approved · decision due ~15 Sep

    Details of existing retained and relocated door schedule pursuant to condition 6.1 (b) of listed building consent dated 14 March 2023 (RN:22/05005/LBC)

    Decided

  • 17 - 21 South Audley Street London W1K 2NY

    26/04896/ADLBC Submitted 21 Jul 2026 50 yards away

    89% historically approved · decision due ~15 Sep

    Details of cornices on levels 1-4 pursuant to partial discharge of conditions 6.12 and 6.13 (PART) of listed building consent dated 14th March 2023 (RN: 22/05005/LBC).

    Awaiting decision

  • 17 - 21 South Audley Street London W1K 2NY

    26/04897/ADLBC Submitted 21 Jul 2026 50 yards away

    89% historically approved · decision due ~16 Sep

    Details of a survey schedule of existing structural timberwork with a method statement for the eradication of any identifed dry rot such as may be necessary pursuant to condition 12.8 (Part in relation to the main roof over 17-22 South Audley Street) of Listed Building consent dated 14th March 2023 (RN: 22/05005).

    Awaiting decision

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