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50, Eastcastle Street, W1W 8EA

25/04435/FULLFull planning permissionApproved
Full

Approved on 17 February 2026

7 conditions

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

Installation of roof top plant and enclosures to provide upgraded mechanical services to the office floors.

Submitted
2 July 2025
  1. Received2 Jul
  2. Validated
  3. Consult.
  4. Target
  5. Decided17 Feb

Decided in 230 days (council typically 49)

About this application

This is a planning application at 50, Eastcastle Street, W1W 8EA. Westminster has handled 804 applications of this type. This one was decided in 230 days, 26 weeks longer than Westminster's typical decision time. The site is in the East Marylebone conservation area, with 5 listed buildings nearby. There has been 1 other application at this address. In the past year there have been 469 applications across WEW_22. We hold 251 applications in total for the W1W postcode area.

84% of full planning permission 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
W1W 8EA
Application type
Full planning permission

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: East Marylebone
  • Listed building: Grade II*: 156-162, Oxford Street W1On or next to 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.

© 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.

Associated applications

  1. 2025
    2 Jul

    Installation of roof top plant and enclosures to provide upgraded mechanical services to the office floors.

    This applicationApprovedFull planning permission25/04435/FULL
  2. 2025
    26 Jun

    Amendments to planning permission dated 07 February 2024 (RN: 23/08597/FULL

    RefusedNon-material amendmentFiled alongside25/04370/NMA

Source: Westminster

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

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