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14 Cavendish Square London W1G 9DB

26/05855/ADLBCApproved
Discharge / amendments

Approved on 8 September 2026

Approximate site (title boundary)
Boundary © HM Land Registry, © Ordnance Survey · details

This information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey AC0000851063. Conditions of use.

Proposal

Details of doors (external) showing adjoining fabric and key details, windows showing adjoining fabric and key details, sliding roof lights above stair leading to roof terrace showing adjoining fabric and key details, works to the vaults, including any tanking and all sides of roof access leading to roof top terrace to be solid not glazed pursuant to conditions 3 (1,2,3 and 6) and 9 of Listed Building Consent dated 11th March 2026 (RN:25/07887).

Submitted
26 August 2026
  1. Received26 Aug
  2. Validated26 Aug
  3. Consult.
  4. Target
  5. Decided8 Sep

Decided in 13 days

About this application

This is a planning application for window replacement at 14 Cavendish Square London W1G 9DB. Westminster has handled 27,108 applications of this type. This one was decided in 13 days, 5 weeks quicker than Westminster's typical decision time. The site is in the Harley Street conservation area, with 16 listed buildings nearby. There have been 5 other applications at this address. We hold 590 applications in total for the W1G postcode area.

Application details

Postcode
W1G 9DB

Planning application dates

Date validated
26 August 2026

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Harley Street
  • Listed building: Grade II: 15, Cavendish Square W1On or next to this site · +3 more
  • Article 4 direction: Article 4 Basement Development Permitted Rights Removed+1 more
  • Flood zone 1: Low probability (rivers and sea)
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

6 other applications at this property, newest first.

  1. 2026
    20 Jul

    Detailed drawings of the sliding roof lights above stair leading to roof terrace showing adjoining fabric and…

    ApprovedDischarge of conditions26/04714/ADLBC
  2. 2025
    30 Oct

    Alterations including; demolition and alteration to roof structure including the installation of mechanical…

    ApprovedApplication25/07886/FULL
  3. 2025
    30 Oct

    Alterations including; demolition and alteration to roof structure including the installation of mechanical…

    ApprovedListed building consent25/07887/LBC
  4. 2025
    8 Aug

    Details of an Operational Management Plan pursuant to Condition 3 of planning permission dated 9th April 2025…

    ApprovedDischarge of conditions25/05407/ADFULL
  5. 2025
    18 Jun

    Details Operational Management Plan pursuant to Condition 3 (A and B) of planning permission dated 09 April…

    RefusedDischarge of conditions25/04137/ADFULL
  6. 2025
    3 Feb

    Use of lower ground, ground, first, and second floors as a not-for-profit museum (Use Class F1).

    ApprovedFull Planning Permission Application25/00722/FULL

Source: Westminster

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

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