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30 Grosvenor Square London W1K 6AN

26/03111/NMAApproved
Discharge / amendments

Approved on 12 June 2026

Council decision: Application Permitted

Site boundary (council red line)

Proposal

Amendments to planning permission dated 7th April 2025 (RN:24/05111/FULL) for, 'Alterations to the existing building including retention & repair of the front and side facades, part demolition & replacement of the rear facade, rear extension of the 2nd-5th floors, removal of existing & introduction of a new 6th floor, introduction of a new set-back 7th floor, extension of the existing basement levels to include two additional basement levels (including one mezzanine level), installation of roof plant & plant screen, public realm works including hard & soft landscaping, removal of the security kiosks, fencing, bollards & gates/barriers to Blackburne's Mews & Culross Street, removal & replacement of 6 No. trees in front of the Grosvenor Square elevation & re-opening of the road on the western side of the Square, all in connection with the use of the building as a hotel (Class C1) with flexible retail/restaurant use at 1st floor, ground floor and basement 1 (Class A1/Class A3/Class C1), flexible restaurant/bar use at 7th floor (Class A3/Class A4/Class C1), leisure/spa facilities within the basement (Class D2/Class C1) & an ancillary ballroom, event spaces, back of house facilities & associated car, cycle parking & servicing facilities accessed from Blackburne's Mews, & other associated works'; Namely, to vary the wording of Condition 18 to enable retail unit R3 located on the corner of Upper Grosvenor Street and Blackburne's Mew to open at 06.30 rather than 07.00.

Received
12 May 2026
  1. Received12 May
  2. Validated12 May
  3. Consult.
  4. Target
  5. Decided12 Jun

Decided in 31 days

About this application

This is a planning application for demolition at 30 Grosvenor Square London W1K 6AN. Westminster has handled 27,108 applications of this type. This one was decided in 31 days, 3 weeks quicker than Westminster's typical decision time. The site is in the Mayfair conservation area, with 19 listed buildings nearby. There have been 10 other applications at this address. We hold 886 applications in total for the W1K postcode area.

Application details

Postcode
W1K 6AN

Planning application dates

Date validated
12 May 2026

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

Also checked, none recorded (21)

flood storage areas, tree preservation orders, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, Heritage at Risk entries, nutrient neutrality catchments, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, ancient woodland, national nature reserves, local nature reserves, heritage coasts and brownfield registers.

A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.

Data © Crown copyright and others · sources and licences

Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.

© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.

© Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026.

© Environment Agency copyright and/or database right 2026. All rights reserved. Flood Map for Planning, Open Government Licence v3.0.

Contains Ordnance Survey data © Crown copyright and database right 2026.

Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.

Planning history at this site

20 other applications at this property, newest first.

  1. 2026
    14 Oct

    Installation of temporary weather screens within the external planters across the ground floor exterior…

    PendingFull planning permission26/07031/FULL
  2. 2026
    28 Sep

    Installation of a small ice skating rink temporarily at the front of our property measuring 8m X 18m (ice…

    PendingApplication26/06060/FULL
  3. 2026
    10 Jul

    Amendments to planning permission dated 10 April 2026 (RN: 25/09270/FULL

    ApprovedNon-material amendment26/04647/NMA
  4. 2026
    10 Jul

    Detailed drawings and specification of the external dining arrangement and furniture, and Operational…

    ApprovedDischarge of conditions26/04646/ADFULL
  5. 2026
    23 Feb

    Installation of permanent external planter boxes at ground floor level on the Upper Brook Street elevation…

    ApprovedApplication25/09270/FULL
  6. 2026
    9 Feb

    Detailed drawings and/or full particulars of the alterations at ground floor level including shopfronts and…

    ApprovedDischarge of conditions26/00778/ADFULL

Source: Westminster

Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.

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