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46 Portland Place London W1B 1NF

26/04128/LBCApproved

Approved on 19 August 2026

Site boundary (council red line)

Proposal

Internal alterations to the rear of the first floor comprise the removal of existing non-original internal partitions associated with the WC/shower block and kitchen within the closet wing. All fixtures, fittings, and non-original doors within these areas will be removed. Suspended ceilings will also be taken down to reinstate the original ceiling heights and proportions of the principal rooms. The proposals include the installation of a new WC and tea point, together with associated partitioning. In addition, a new opening will be formed to provide a visual and physical connection between the library/study and the rear seating area. This will be detailed with matching cornices and skirtings to ensure the works are sympathetic to, and consistent with, the character and appearance of the existing historic fabric.

Submitted
23 June 2026
  1. Received23 Jun
  2. Validated
  3. Consult.
  4. Target
  5. Decided19 Aug

Decided in 57 days

About this application

This is a planning application at 46 Portland Place London W1B 1NF. Westminster has handled 27,108 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 10 listed buildings nearby. There have been 3 other applications at this address. We hold 372 applications in total for the W1B postcode area.

Application details

Postcode
W1B 1NF

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*: 34-52, Portland Place W1On or next to this site · +1 more
  • Article 4 direction: Article 4 Basement Development Permitted Rights Removed
  • 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
    23 Jun

    Internal alterations to the rear of the first floor comprise the removal of existing non-original internal…

    This applicationApprovedListed building consent26/04128/LBC
  2. 2026
    22 Jun

    Installation of replacement all non-original windows and relevant external glazed doors with new painted…

    ApprovedListed building consentFiled alongside26/04113/LBC

Source: Westminster

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

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