Underground Car Park Cavendish Square London W1G 0PG

26/05469/NMAApproved

Approved on 11 September 2026

Site boundary (council red line)

Proposal

Amendments to planning permission dated 24th May 2022 (RN:19/08460/FULL) for Demolition and erection of above ground structures in conjunction with the use of an underground car park (Sui Generis) as a flexible mixed use commercial development comprising uses within the following use classes A1-A5, B1,B2, B8, C1, C2, D1, and D2 along with the excavation of a 4th basement level, new entrances and associated landscaping and highways works to provide up to 25,953 sqm (GIA) of floorspace. Namely, a series of updated drawings relating to the southern entrance, gardeners pavilion, northeast pavilion, and the extent of pavement lights and grilles.

Received: 12 August 2026
Council: City of Westminster

ReceivedReceived12 Aug
ValidatedValidated18 Aug
Consult.Consultation
TargetTarget Date
DecidedDecided11 Sep

Decided in 24 days

About this application

This is a planning application for demolition at Underground Car Park Cavendish Square London W1G 0PG. Westminster has handled 27,108 applications of this type. This one was decided in 24 days, 4 weeks quicker than Westminster's typical decision time. The site is in the Harley Street conservation area, with 6 listed buildings nearby. There have been 3 other applications at this address. We hold 590 applications in total for the W1G postcode area.

Application details

Postcode: W1G 0PG

Planning application dates

Date validated: 18 August 2026

Site constraints

Checking the site

2/3

Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

Conservation area: Harley Street
Listed building: Grade II: Statue of Lord George Bentinck (at South End of Square Garden)On this site
Article 4 direction: Article 4 Basement Development Permitted Rights Removed+1 more
Tree Preservation Order: Ref W4Part of the site
Brownfield land register: Harcourt House 19A Cavendish Square London W1G 0PLRegister site at or near this address
Flood zone 1: Low probability (rivers and sea)

Also checked, none recorded (19)

flood storage areas, 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.

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

2026
21 Aug
Details of Site Environmental Management Plan pursuant to condition 3 of planning permission dated 24 May…
PendingApplicationFiled alongside26/05731/ADFULL
2026
18 Aug
Amendments to planning permission dated 24th May 2022 (RN:19/08460/FULL
This applicationApprovedNon-material amendment26/05469/NMA

Planning history at this site

8 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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