1 Cavendish Square London W1G 0LA

25/06203/FULLFull Planning Permission ApplicationApproved

Full

Approved on 27 October 2025

Council decision: Application PermittedDelegated (officer decision)

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

Variation of Condition 13 of planning permission dated 20th April 2023 (RN: 22/07690/FULL) for the Opening up to basement areas, lowering of floor in pavement vaults and corridors to increase the useable space, additional opening up to eastern ground floor area, forming of services voids to accommodate plant and equipment, reopening of existing skylight apertures to existing pitched roof for ventilation of services, alterations to eastern facade to accommodate a new plant deck, WC accommodation and small terrace, in -connection with the use of building as a restaurant/drinking establishment (Sui Generis) namely, to extend hours of opening. Application under S73 of the Act

Received: 1 September 2025
Decision level: Delegated (officer decision)
Council: City of Westminster
Ward: West End
Agent: Osel Architecture Ltd.

ReceivedReceived1 Sep
ValidatedValidated1 Sep
Consult.Consultation
TargetTarget Date27 Oct
DecidedDecided27 Oct

Decided in 56 days (council typically 49)

About this application

This is a full planning application at 1 Cavendish Square London W1G 0LA. Westminster has handled 4,484 applications of this type. This one was decided in 56 days, 7 days longer than Westminster's typical decision time. The site is in the Harley Street conservation area, with 9 listed buildings nearby. There have been 5 other applications at this address. In the past year there have been 484 applications across West End. We hold 590 applications in total for the W1G postcode area.

86% of full 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: W1G 0LA
Application type: Full Planning Permission Application
Scale / size: Small

Planning application dates

Date validated: 1 September 2025
Consultation expiry: 8 October 2025
Target decision date: 27 October 2025
Decision issued: 28 October 2025

Applicant and agent

Agent: Osel Architecture Ltd.
Architect profile: OSEL ARCHITECTURE LIMITED
Agent address: Studio 115 The Record Hall 16-16A Baldwins gardens London EC1N 7RJ United Kingdom

Planning decision

Statutory period: 56 days

Publicity

Last advertised: 17 September 2025
Advertisement expiry: 8 October 2025
Site notice start: 8 September 2025
Site notice end: 29 September 2025

Additional information

Planning Portal ID: PP-14287522
Comments: 0
Documents: 19

Site constraints

Checking the site

2/3

Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

Conservation area: Harley Street+1 more
Listed building: Grade II: 1 and 1a, Cavendish Square W1On this site · +1 more
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.

Contains Ordnance Survey data © Crown copyright and database right 2026.

Planning history at this site

16 other applications at this property, newest first.

Source: Westminster

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

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