Sackville House 40 Piccadilly London W1J 0DR

25/07392/LBCApproved

Approved on 20 March 2026

Council decision: Application Permitted

Site boundary (council red line)

Proposal

Alterations to the external wall in the rear lightwell including the installation of separate integrated louvres and glazed screening though with the inclusion on Level 01 of a brick band between the glazing and mechanical louvres and including associated internal alterations, adjustment to the staircase risers at basement and ground floor levels, and alterations and inclusion of joinery within the reception area at ground floor level

Received: 13 October 2025
Council: City of Westminster

ReceivedReceived13 Oct
ValidatedValidated13 Oct
Consult.Consultation
TargetTarget Date
DecidedDecided20 Mar

Decided in 158 days

About this application

This is a planning application for window replacement at Sackville House 40 Piccadilly London W1J 0DR. Westminster has handled 27,140 applications of this type. This one was decided in 158 days, 16 weeks longer than Westminster's typical decision time. The site is in the Mayfair conservation area, with 13 listed buildings nearby. There have been 6 other applications at this address. We hold 940 applications in total for the W1J postcode area.

Application details

Postcode: W1J 0DR

Planning application dates

Date validated: 13 October 2025

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: 39 AND 40, PICCADILLY W1 (See details for further address information)On this site
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.

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

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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