77 - 79 Baker Street London W1U 6RF
Approved on 29 September 2010
Council decision: Application PermittedDelegated (officer decision)
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
Replacement of unauthorised front roof slope, rooftop plant structure and dormers with new pitched roof at 30 degrees and rooflights at 77-79 Baker Street; replacement of unauthorised rear roof slope at 77-79 Baker Street with a traditional mansard roof design; use of the floorspace within the roof of 77-79 (as amended) as a 1x3bedroom penthouse flat.
- Received
- 25 March 2010
- Decision level
- Delegated (officer decision)
- Public comments
- 1
- Council
- City of Westminster
- Ward
- Marylebone High Street
- ReceivedReceived25 Mar
- ValidatedValidated7 Jun
- Consult.Consultation
- TargetTarget Date2 Aug
- DecidedDecided29 Sep
Decided in 114 days (council typically 49)
About this application
This is a full planning application at 77 - 79 Baker Street London W1U 6RF. Westminster has handled 4,484 applications of this type. This one was decided in 188 days, 20 weeks longer than Westminster's typical decision time. The site is in the Portman Estate conservation area, with 2 listed buildings nearby. There are no previous applications recorded at this address. We hold 1,070 applications in total for the W1U 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
- W1U 6RF
- Application type
- Application for full Planning Permission
- Scale / size
- Small
Planning application dates
- Date validated
- 7 June 2010
- Consultation expiry
- 9 July 2010
- Target decision date
- 2 August 2010
- Committee meeting
- 29 September 2010
Applicant and agent
- Agent
- Lawtonduffy
- Agent address
- 9 Holtspur Lane Wooburn Green High Wycombe Bucks HP10 0AA
Planning decision
- Statutory period
- 56 days
Publicity
- Last advertised
- 18 June 2010
- Advertisement expiry
- 9 July 2010
- Site notice start
- 10 June 2010
- Site notice end
- 1 July 2010
Additional information
- Planning Portal ID
- PP-01019167
- Documents
- 10
Site constraints
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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Around this site
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For applicants and trades
Contractors near this project
Find contractors for loft conversions near this site- Atlas South Technical Service LimitedVerifiedLondonProperty MaintenanceHandyman0.8 mi
- Avent Roofing ServicesVerifiedWestminsterRoofing1.0 mi
- Orient Construction Consultancy LimitedVerifiedLondon4.1 mi
- Nova Coat & PlasterVerifiedStreatham, LondonRenovations & RefurbishmentsPlastering5.7 mi
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