47, Marsham Street, SW1P 3DR
Refused on 16 March 2026
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
Alterations and extensions at seventh floor level including new terraces, PVs, green roofs and mechanical plant, in connection with the creation three additional residential units (Class C3).
- Submitted
- 4 July 2025
- Council
- City of Westminster
- ReceivedSubmitted4 Jul
- ValidatedValidated
- Consult.Consultation
- TargetTarget Date
- DecidedDecided16 Mar
Decided in 255 days (council typically 49)
About this application
This is a planning application for an extension at 47, Marsham Street, SW1P 3DR. Westminster has handled 804 applications of this type. This one was decided in 255 days, 29 weeks longer than Westminster's typical decision time. The site is in 20 listed buildings nearby. There have been 3 other applications at this address. In the past year there have been 276 applications across SJW_22. We hold 1,247 applications in total for the SW1P 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.Planning something similar? See what gets approved on your street
Why it was refused
- The new units would not provide a suitable means of escape and suitable access and equipment for firefighting services, and is therefore contrary to London Plan (2021) Policy D12.
From the council's decision notice.
Application details
- Postcode
- SW1P 3DR
- Application type
- Full planning permission
Site constraints
Designations that overlap or adjoin the site outline.
- Flood zone 3: High probability (rivers and sea)Part of the site
- Article 4 direction: Article 4 Basement Development Permitted Rights Removed
Also checked, none recorded (22)
flood storage areas, conservation 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.
Planning history at this site
4 other applications at this property, newest first.
- 20266 Jan
Use of the gym space (on part of the basement floor of Romney House) by non-residents without complying with…
RefusedCertificate of Lawfulness (existing)26/00042/CLEUD - 20257 May
Use of the gym space on part of the basement floor in connection with the residential accommodation in Romney…
WithdrawnLawful development: Existing use25/02742/CLEUD - 202529 Apr
Confirmation that removal of part of the wall to the edge of the roof terrace onto the flat roof is…
ApprovedLawful development: Proposed use25/01984/CLEUD - 202525 Mar
Confirmation that the planning permission dated 07 June 2016 (RN: 16/03776/FULL
PendingLawful development: Proposed use25/01984/CLOPUD
Source: Westminster
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Around this site
Nearby applications
- Romney House 47 Marsham Street London SW1P 3DR14/04272/TCHApproved0.0 mi
- Romney House 47 Marsham Street London SW1P 3DR26/00042/CLEUD · AmendmentRefused0.0 mi
- 1 Dean Trench Street London SW1P 3HB24/02775/LBC · HeritageApproved0.0 mi
- 3 Dean Trench Street London SW1P 3HB14/04159/ADFULL · ConditionsApproved0.0 mi
- 31 Marsham Street London SW1P 3DW07/01022/TPO · TreesApproved0.0 mi
For applicants and trades
Contractors near this project
Find contractors for extensions near this site- Avent Roofing ServicesVerifiedWestminsterRoofing1.0 mi
- Atlas South Technical Service LimitedVerifiedLondonProperty MaintenanceHandyman2.0 mi
- Nova Coat & PlasterVerifiedStreatham, LondonRenovations & RefurbishmentsPlastering4.0 mi
- Orient Construction Consultancy LimitedVerifiedLondon4.3 mi
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