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20, Upper Brook Street, W1K 7PX

25/03584/FULLHouseholder planning & listed building consentApproved
Householder

Approved on 11 August 2025

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

Erection of single-storey storey roof extension, excavation to provide single-storey basement extension and associated alterations; all to alter and enlarge dwellinghouse (Class C3).

Submitted
27 May 2025
  1. Received27 May
  2. Validated
  3. Consult.
  4. Target
  5. Decided11 Aug

Decided in 76 days (council typically 49)

About this application

This is a planning application for a new dwelling at 20, Upper Brook Street, W1K 7PX. Westminster has handled 167 applications of this type. This one was decided in 76 days, 4 weeks longer than Westminster's typical decision time. The site is in the Mayfair conservation area, with 20 listed buildings nearby. There has been 1 other application at this address. In the past year there have been 469 applications across WEW_22. We hold 886 applications in total for the W1K postcode area.

87% of householder planning & listed building consent 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 7PX
Application type
Householder planning & listed building consent

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: 20, Upper Brook Street W1On this site · +5 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. 2025
    27 May

    Erection of single-storey storey roof extension, excavation to provide single-storey basement extension and…

    This applicationApprovedListed building consent25/03584/FULL
  2. 2025
    27 May

    Single-storey storey roof extension, refurbishment of the existing ground floor, single-storey basement…

    ApprovedListed building consentFiled alongside25/03585/LBC

Source: Westminster

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

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