Pegasus House 37 - 43 Sackville Street London W1S 3EH

25/07409/ADFULLApproval of Details (Full PP)Approved

Discharge / amendments

Approved on 27 February 2026

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

Detailed drawings at scale 1:20, 1:5 and 1:1 of new windows (PR09, PR-10 and PR-28) pursuant to partial discharge of condition 7 of planning permisssion dated 21st September 2021 (RN:20/07605/FULL). Linked to 25/07460/ADLBC

Received: 14 October 2025
Council: City of Westminster
Ward: West End

ReceivedReceived14 Oct
ValidatedValidated14 Oct
Consult.Consultation
TargetTarget Date9 Dec
DecidedDecided27 Feb

Decided in 136 days (council typically 49)

About this application

This is an application to discharge conditions at Pegasus House 37 - 43 Sackville Street London W1S 3EH. Westminster has handled 3,063 applications of this type. This one was decided in 136 days, 12 weeks longer than Westminster's typical decision time. The site is in the Mayfair conservation area, with 20 listed buildings nearby. There have been 24 other applications at this address. In the past year there have been 478 applications across West End. We hold 791 applications in total for the W1S postcode area.

92% of conditions 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: W1S 3EH
Application type: Approval of Details (Full PP)
Scale / size: Small

Planning application dates

Date validated: 14 October 2025
Target decision date: 9 December 2025

Applicant and agent

Agent: Newmark
Agent address: 1 Fitzroy Place 6 Mortimer Street London W1T 3JJ United Kingdom

Planning decision

Statutory period: 56 days

Additional information

Planning Portal ID: PP-14397333
Comments: 0
Documents: 14

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*: 36, Sackville Street W1On or next to this site · +2 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.

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

Planning history at this site

20 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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