20 Upper Grosvenor Street London W1K 7PB
Proposal
Use of the third and fourth floor as offices (Class E). (LAND USE SWAP WITH 21 LEES PLACE (REF: 25/06937/FULL)
- Received
- 24 September 2025
- Decided
- 7 April 2026
- Council
- City of Westminster
- ReceivedSubmitted24 Sep
- ValidatedValidated
- Consult.Consultation
- TargetTarget Date
- DecidedDecided7 Apr
Decided in 195 days
This is a planning application at 20 Upper Grosvenor Street London W1K 7PB. Westminster has handled 26,489 applications of this type and approves 88% of them, typically deciding them in 54 days. This one was decided in 195 days, 20 weeks longer than Westminster's median. The site is in the Mayfair conservation area, with 20 listed buildings nearby. There has been 1 other application at this address. We hold 845 applications in total for the W1K postcode area.
Application Details
Applicant & Agent
Planning Application Dates
Planning Decision
Publicity
Appeal
Additional Information
Source: Westminster
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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ApprovedFull Planning Permission ApplicationPart of25/06937/FULL - 202524 Sep
Use of the third and fourth floor as offices (Class E). (LAND USE SWAP WITH 21 LEES PLACE (REF: 25/06937/FULL
This applicationApprovedApplication25/06740/FULL
Planning history at this site
1 other application at this property, newest first.
Planning constraints
Designations that overlap or adjoin the site outline.
- Conservation area: Mayfair
- 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 2026-10-09. 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.
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