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43 - 45 Portman Square London W1H 6LY

25/06153/FULLFull Planning Permission ApplicationApproved
Full

Approved on 22 April 2026

Site boundary (council red line)

Proposal

Variation of Condition 1 of planning permission dated 7th April 2025 (RN: 24/04987/FULL) for, 'Partial demolition of the existing roof and removal of plant equipment; construction of a roof extension providing new office (Class E) floorspace with associated external amenity spaces and plant equipment; refurbishment of the existing building, including infilling of the existing atrium; alterations to the existing façade; provision of cycle parking spaces and end of journey facilities, and all associated and ancillary works'; Namely,the retention of existing cores, the infilling of atria, the provision of additional rooflights to the western 3rd floor terrace, layout changes at ground and lower ground levels and changes to some windows on the eastern façade and retention of existing first floor windows, resulting in single storey full height glazing to the retail frontages along Orchard Street (Application under Section 73 of the Act).

Received
29 August 2025
Public comments
1
Ward
West End
Agent
DP9 Limited
  1. Received29 Aug
  2. Validated15 Oct
  3. Consult.
  4. Target14 Jan
  5. Decided22 Apr

Decided in 189 days (council typically 49)

About this application

This is a full planning application for demolition at 43 - 45 Portman Square London W1H 6LY. Westminster has handled 4,484 applications of this type. This one was decided in 236 days, 27 weeks longer than Westminster's typical decision time. The site is in the Portman Estate conservation area, with 2 listed buildings nearby. There have been 4 other applications at this address. In the past year there have been 484 applications across West End. We hold 896 applications in total for the W1H 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
W1H 6LY
Application type
Full Planning Permission Application
Scale / size
Medium

Planning application dates

Date validated
15 October 2025
Consultation expiry
15 October 2025
Target decision date
14 January 2026

Applicant and agent

Agent
DP9 Limited
Agent address
100 Pall Mall London SW1Y5NQ United Kingdom

Planning decision

Statutory period
91 days

Publicity

Last advertised
24 September 2025
Advertisement expiry
15 October 2025
Site notice start
12 September 2025
Site notice end
3 October 2025

Additional information

Planning Portal ID
PP-14273760
Documents
24

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Portman Estate
  • Article 4 direction: Article 4 Basement Development Permitted Rights Removed+1 more
  • Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (22)

flood storage areas, listed buildings, 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.

Source: Westminster

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

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