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Planning application

17 - 21 South Audley Street London W1K 2NY

Decided 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

Decided. The decision notice on the council portal carries the outcome in full, including any conditions.

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
Decided
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 87 applications since 2023: 13 approved, 0 refused.

  • 26/07367/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Details of new coordinated service routes pursuant to condition 6 (6) of listed building consent dated 14 March 2023 (RN: 22/05005/LBC)

    Submitted 28 Oct 2026
  • 26/07217/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Detailed drawings with method statements of the new stairs, banisters and handrails and or associated junctions pursuant to condition 6.11 of listed building dated 14th March 2023 (RN:22/05005/LBC)

    Submitted 21 Oct 2026
  • 26/07200/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Detailed drawings 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 Oct 2026
  • 26/07142/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Details of new coordinated services routes generally, showing distribution and proposed impact on existing historic fabric purusant to Condition 6.6 of Listed Building Consent dated 22/05005/LBC (RN:22/05005/LBC)

    Submitted 19 Oct 2026
  • 26/06825/ADFULL 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 planning permission dated 14th March 2023 (RN:22/05005/LBC)

    Submitted 6 Oct 2026
  • 26/06447/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Details of reflected ceiling plans pursuant to condition 6 (part 10) of listed building consent dated 14 March 2023 (RN: 22/05005/LBC)

    Submitted 21 Sep 2026
  • 26/06405/ADLBC Decided

    17 - 21 South Audley Street London W1K 2NY

    Details of new secondary glazing showing each window type, location, key details and relationship to the existing window and existing historic fabric pursuant to discharge of condtion 6 (part 5) of listed building consent dated 27th September 2023 (RN: 22/05005/LBC).

    Submitted 18 Sep 2026
  • 26/06322/ADLBC Decided

    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)

    Decided 1 Oct 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

Timeline

Dates from the published record

  1. 16 Jun 2026

    Received by Westminster

  2. 21 Jul 2026

    Added to PlanIndex

  3. 2 Nov 2026

    Status changed to Decided

    Previously Pending.

Cases linked to this one on the register

  • 26/03883/LBC Decided

    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 Decided

    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

After the decision

Westminster has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. More in our guide to what happens after a planning decision.

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

    26/07142/ADLBC Submitted 19 Oct 2026 50 yards away

    89% historically approved · decision due ~14 Dec

    Details of new coordinated services routes generally, showing distribution and proposed impact on existing historic fabric purusant to Condition 6.6 of Listed Building Consent dated 22/05005/LBC (RN:22/05005/LBC)

    Awaiting decision

  • 17 - 21 South Audley Street London W1K 2NY

    26/06447/ADLBC Submitted 21 Sep 2026 50 yards away

    89% historically approved · decision due ~16 Nov

    Details of reflected ceiling plans pursuant to condition 6 (part 10) of listed building consent dated 14 March 2023 (RN: 22/05005/LBC)

    Awaiting decision

  • 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

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    Installation of new cast iron water pipe on rear courtyard elevation. (Linked with 26/07529/LBC)

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