Somerset House 18 Mansell Street London E1 8AA
Proposal
Demolition of the existing buildings and redevelopment of the site to provide a building ranging from basement, ground plus 19 storeys, comprising office (Class E) and aparthotel (Class C1); associated cycle and car parking, hard and soft landscaping and other associated works.
- Received
- 25 March 2026
- Decided
- 12 May 2026 · No Objections to OBS
- Decision level
- Delegated (officer decision)
- Council
- City of London Corporation
- Ward
- Portsoken
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.
- ReceivedSubmitted25 Mar
- ValidatedValidated25 Mar
- Consult.Consultation
- TargetTarget Date15 Apr
- DecidedDecided12 May
Decided in 48 days
This is a planning application for demolition at Somerset House 18 Mansell Street London E1 8AA. City of London has handled 6,476 applications of this type and approves nearly all of them, typically deciding them in 68 days. This one was decided in 48 days, 3 weeks quicker than City of London's median. The site is in 5 listed buildings nearby. There are no previous applications recorded at this address. In the past year there have been 20 applications across Portsoken. We hold 2,071 applications in total for the E1 postcode area.
Application Details
Applicant & Agent
Planning Application Dates
Planning Decision
Publicity
Appeal
Additional Information
Source: City of London
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Planning history at this site
1 other application at this property, newest first.
Planning constraints
Designations that overlap or adjoin the site outline.
- Flood zone 1: Low probability (rivers and sea)
Not published by this council, so not checked: Article 4 directions and tree preservation orders. Ask the council if these matter.
Also checked, none recorded (22)
flood storage areas, conservation areas, listed buildings, 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 2026-10-09. 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.
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