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1 Hanover Street London W1S 1YZ

25/08273/NMAApproved

Approved on 31 March 2026

Council decision: Application Permitted

Site boundary (council red line)

Proposal

Amendments to planning permission dated 27th March 2024 (RN: 23/08783/FULL) for, "Installation of new front and end-of-trip facilities entrances on Hanover Street; alterations to the internal atrium; replacement of roof structures and upgrading plant and creating new pavilion and terrace on the roof; introduction of a new mansard roof onto Hanover Street; infill extension on Princes Street at 5th and 6th floor; alterations to the Cupola; replacement of existing artwork; reorganisation of internal partitioning; and associated works"; Namely, to allow retention of perimeter balustrades, relocation of light box on Hanover Street, alterations to facade to display public artwork, and amendments to cladding system of core.

Received
12 November 2025
  1. Received12 Nov
  2. Validated4 Mar
  3. Consult.
  4. Target
  5. Decided31 Mar

Decided in 27 days

About this application

This is a planning application for an extension at 1 Hanover Street London W1S 1YZ. Westminster has handled 27,108 applications of this type. This one was decided in 27 days, 3 weeks quicker than Westminster's typical decision time. The site is in the Mayfair conservation area, with 9 listed buildings nearby. There have been 12 other applications at this address. We hold 791 applications in total for the W1S postcode area.

Application details

Postcode
W1S 1YZ

Planning application dates

Date validated
4 March 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.

Associated applications

  1. 2026
    4 Mar

    Retention of perimeter balustrades, relocation of light box on Hanover Street, alterations to facade to…

    ApprovedListed building consentRelated25/08257/LBC
  2. 2026
    4 Mar

    Amendments to planning permission dated 27th March 2024 (RN: 23/08783/FULL

    This applicationApprovedNon-material amendment25/08273/NMA

Planning history at this site

20 other applications at this property, newest first.

  1. 2026
    23 Oct

    Detailed drawings (scale 1:5 and 1:20) and labelled photographs of samples of the facing materials to be used…

    ApprovedDischarge of conditions26/06777/ADFULL
  2. 2026
    23 Oct

    Detailed drawings (scale 1:5 and 1:20) and labelled photographs of samples of the facing materials to be used…

    ApprovedDischarge of conditions26/06759/ADLBC
  3. 2026
    2 Oct

    Details of updated method statement of the façade repairs and cleaning proposed pursuant to re-discharge of…

    ApprovedDischarge of conditions26/06753/ADLBC
  4. 2026
    21 Sep

    Detailed drawings and manufacturers specifications of the materials and finish of the duct, and elevations…

    ApprovedApplication26/06188/ADFULL
  5. 2026
    21 Sep

    Detailed drawings manufacturers specifications of the materials and finish of the duct, and elevations and…

    ApprovedApplication26/06091/ADLBC
  6. 2026
    7 Sep

    Detailed drawings and a detailed biodiversity management plan in relation to the planting scheme on the roof…

    ApprovedApplication26/06095/ADFULL

Source: Westminster

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

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