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40 - 46 Brook Street West End London W1K 5DB

25/08197/LBCListed Building Consent ApplicationApproved
Listed building consent

Approved on 1 April 2026

Site boundary (council red line)

Proposal

Excavation to deepen the basement level under nos 40-46 Brook Street; raising height of fourth-floor ceilings in the rear townhouses (nos. 42-46 Brook Street) and installation of three plant decks with localised structural penetrations to accommodate supporting beams; installation of new external plant equipment and associated enclosures at roof levels, and erection of a lightweight pergola at first-floor level between the townhouses and the mews building, together with two new roof lanterns at ground floor level; replacement of non-original windows at ground and second floor of no. 40 Brook Street, alongside other elevation alterations at ground floor level; reinstatement of historical features, internal and external alterations including localised fabric removal, installation of a corner turret and side gables; and other associated works. (Linked with 25/08366/NMA)

Received
11 November 2025
Ward
West End
  1. Received11 Nov
  2. Validated17 Nov
  3. Consult.
  4. Target12 Jan
  5. Decided1 Apr

Decided in 135 days (council typically 49)

About this application

This is a heritage application for window replacement at 40 - 46 Brook Street West End London W1K 5DB. Westminster has handled 2,677 applications of this type. This one was decided in 141 days, 13 weeks longer than Westminster's typical decision time. The site is in the Mayfair conservation area, with 20 listed buildings nearby. There are no previous applications recorded at this address. In the past year there have been 484 applications across West End. We hold 884 applications in total for the W1K postcode area.

93% of heritage applications at City of Westminster were approved. Across all application types, the council typically decides in about 7 weeks (median).

Based on decided applications received in the last 3 years.See what's approved near your address

Application details

Postcode
W1K 5DB
Application type
Listed Building Consent Application
Scale / size
Small

Planning application dates

Date validated
17 November 2025
Target decision date
12 January 2026

Applicant and agent

Agent
Newmark
Agent address
One Fitzroy 6 Mortimer Street London SW1T 3JJ United Kingdom

Planning decision

Statutory period
56 days

Additional information

Planning Portal ID
PP-14430657
Comments
0
Documents
95

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Mayfair
  • Listed building: Grade II: 1-7, Davies Mews W1 and 28-30 South Molton Lane W1On this site · +17 more
  • Article 4 direction: Article 4 Basement Development Permitted Rights Removed+1 more
  • Brownfield land register: Development Site Bound By Brook Street, Davies Street And South Molton Lane (excluding 58…Register site at or near this address
  • Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (20)

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 and heritage coasts.

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. 2025
    17 Nov

    Amendments to planning permission dated 19 April 2023 (RN: 22/04610/FULL

    ApprovedNon-material amendmentPart of25/08366/NMA
  2. 2025
    11 Nov

    Excavation to deepen the basement level under nos 40-46 Brook Street; raising height of fourth-floor ceilings…

    This applicationApprovedListed building consent25/08197/LBC

Source: Westminster

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

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