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Flanders House 1A Cavendish Square London W1G 0PH

26/04900/LBCApproved

Approved on 17 September 2026

Site boundary (council red line)

Proposal

Maintenance and repair works to the external elevations of the building including ironwork and windows.

Received
22 July 2026
  1. Received22 Jul
  2. Validated22 Jul
  3. Consult.
  4. Target
  5. Decided17 Sep

Decided in 57 days

About this application

This is a planning application for window replacement at Flanders House 1A Cavendish Square London W1G 0PH. Westminster has handled 27,078 applications of this type. This one was decided in 57 days, 8 days longer than Westminster's typical decision time. The site is in the Harley Street conservation area, with 9 listed buildings nearby. There are no previous applications recorded at this address. We hold 590 applications in total for the W1G postcode area.

Application details

Postcode
W1G 0PH

Planning application dates

Date validated
22 July 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: 1 and 1a, Cavendish Square W1On or next to this site
  • 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.

Associated applications

  1. 2026
    3 Nov

    Details of the methodology for repairs to the external render, stonework, ironwork and windows pursuant to…

    PendingListed building consentRelated26/07475/ADLBC
  2. 2026
    22 Jul

    Maintenance and repair works to the external elevations of the building including ironwork and windows.

    This applicationApprovedListed building consent26/04900/LBC

Source: Westminster

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

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