39, 44, Grosvenor Square, W1K 2HP
Approved on 26 September 2025
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
Variation of Condition 10 of planning permission dated 20th January 2025 (RN: 24/05108/FULL) for, 'Change of use of part of an underground car park below The Biltmore Mayfair Hotel (Sui Generis) to self-storage (Use Class B8)'; NAMELY, to allow access for 'trusted customers' (i.e. those existing customers who have held a unit at the facility for a minimum of six months) between 08.00 and 22.00 Monday to Saturday (no change is proposed on Sundays and public holidays). (Application under Section 73 of the Act).
- Submitted
- 2 June 2025
- Council
- City of Westminster
- ReceivedSubmitted2 Jun
- ValidatedValidated
- Consult.Consultation
- TargetTarget Date
- DecidedDecided26 Sep
Decided in 116 days (council typically 49)
About this application
This is a planning application for a change of use at 39, 44, Grosvenor Square, W1K 2HP. Westminster has handled 156 applications of this type. This one was decided in 116 days, 10 weeks longer than Westminster's typical decision time. The site is in the Mayfair conservation area, with 4 listed buildings nearby. There has been 1 other application at this address. In the past year there have been 474 applications across WEW_22. We hold 886 applications in total for the W1K postcode area.
86% of removal/variation of a condition 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.Planning something similar? See what gets approved on your street
Application details
- Postcode
- W1K 2HP
- Application type
- Removal/Variation of a condition
Site constraints
Designations that overlap or adjoin the site outline.
- Conservation area: Mayfair
- 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.
Planning history at this site
2 other applications at this property, newest first.
- 202515 May
Display of a non-illuminated fascia sign, a wall sign and a height restriction sign measuring 2.00m x 1.40m…
ApprovedAdvertisement consent25/03311/ADV - 202516 Apr
Details of an Operational Management Plan and how waste is to be stored on site and how materials for…
ApprovedDischarge of conditions25/02661/ADFULL
Source: Westminster
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Around this site
Nearby applications
- 39 - 44 Grosvenor Square London W1K 2HP25/02661/ADFULL · ConditionsApproved0.0 mi
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- 35 - 37 Grosvenor Square London W1K 2HN24/05532/FULL · FullAwaiting decision0.0 mi
- Flat D 42 South Audley Street London W1K 2PT26/02805/LBC · HeritageApproved0.1 mi
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For applicants and trades
Contractors near this project
Find contractors for change of use near this site- Avent Roofing ServicesVerifiedWestminsterRoofing0.5 mi
- Atlas South Technical Service LimitedVerifiedLondonProperty MaintenanceHandyman1.0 mi
- Orient Construction Consultancy LimitedVerifiedLondon4.2 mi
- Nova Coat & PlasterVerifiedStreatham, LondonRenovations & RefurbishmentsPlastering5.1 mi
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