126 - 134 Baker Street London W1U 6SH
Proposal
Use of first floor level as Class C3 to provide new residential accommodation and use of ground floor as Class C3 to allow reconfigured retail unit and residential entrance with internal cycle store; external alterations to the western (front) elevation to create reconfigured retail unit frontage and residential entrance with projecting render feature above; creation of ground floor residents' storage room and replacement of obsolete fire escape door to western (front) elevation with new entrance door to residents' storage room; relocation of fenestration at first floor level to eastern elevation; replacement of three existing windows at second, third and fourth floor level of eastern elevation with full height windows with Juliet balconies; replacement of all other windows to eastern elevation with new windows; replacement of windows to western and southern elevation; replacement of render finish to western, eastern and southern elevation; alteration of three existing flues to rear elevation; extension of existing rear staircore by one storey to allow roof access and provision for plant at roof level; and works at roof level comprising removal of redundant stair cores, extension and alterations to existing plant rooms, installation of smoke extract fan, installation of riser, alteration to design and extent of roof safety railing, provision of photovoltaic panels and green roof and removal of obsolete existing roof ladder.
- Received
- 17 July 2024
- Target decision date
- 11 September 2024
- Council
- City of Westminster
- Ward
- Marylebone
- ReceivedSubmitted17 Jul
- ValidatedValidated17 Jul
- Consult.Consultation
- TargetTarget Date11 Sep
- DecidedDecided
This is a full planning application for an extension at 126 - 134 Baker Street London W1U 6SH. Westminster has handled 4,496 applications of this type and approves 85% of them, typically deciding them in 74 days. It was submitted on 17 July 2024 and is still awaiting a decision. The site is in the Portman Estate conservation area, with 4 listed buildings nearby. There have been 6 other applications at this address. In the past year there have been 196 applications across Marylebone. We hold 1,036 applications in total for the W1U postcode area.
Application Details
Applicant & Agent
Source: Westminster
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Associated applications
- 202417 Jul
Use of first floor level as Class C3 to provide new residential accommodation and use of ground floor as…
This applicationPendingFull24/04851/FULL - 202417 Jul
Use of first floor level as Class C3 to provide new residential accommodation and from Class E to Class C3 at…
PendingFull Planning Permission ApplicationFiled alongside24/04852/FULL
Planning history at this site
6 other applications at this property, newest first.
- 202613 Oct
Details of signed appendix A checklist and SEMP pursuant to condition 13 of planning permission dated 18th…
PendingApplication26/06112/ADFULL - 202610 Sep
Details of the mechanical ventilation system pursuant to condition 12 of planning permission dated 18th…
PendingApplication26/06191/ADFULL - 202610 Jul
Amendments to planning permission dated 10th November 2015 (RN:15/07396/FULL
ApprovedNon-material amendment26/04634/NMA - 20188 Aug
Confirmation that the proposed works to the front entrance are sufficient to constitute implementation of the…
ApprovedCertificate of Lawfulness (proposed)18/06694/CLOPUD - 201826 Jun
Details of doors at 126 Baker Street to partially discharge condition 13 of planning permission dated 10…
ApprovedDischarge of conditions18/05385/ADFULL - 201815 Mar
Details pursuant to Conditions 17 and 18 of planning permission dated 10 November 2015 (RN: 15/07396/FULL
ApprovedDischarge of conditions18/02171/ADFULL
Planning constraints
Designations at the address point. Ones next to the site may also apply.
- Conservation area: Portman Estate
- Article 4 direction: Article 4 Basement Development Permitted Rights Removed+1 more
- Brownfield land register: 126 - 134 Baker Street, London, W1U 6SHRegister site at or near this address
- Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (21)
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 and heritage coasts.
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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