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Status

Pending Change of use
Received
21 Jan 2026
New homes
3

Full proposal

Internal alterations to 38 Portland Place throughout to change the use from sui generis (Institutional Use) to Class E office use throughout in connection with removal of link building between 38 Portland Place and 9 Cavendish Mews North at ground, first and second floors, formation of a new rear stair core to main building and new external fire escape stair. New terraces to office space in connection with plant space and the installation of air source heat pumps. Alterations to the front and rear facades of the mews building in connection with internal alterations to create new residential units and new plant space to mews roof level and new terrace spaces all in connection with the change of use of ground to first floors from sui generis (institutional use) and second floor Class E (office use) of 9 Cavendish Mews North to Class C3 residential use to form 3x 1 bedroom flats. (Part of a land swap with 1 Marylebone High Street and Moxon House). (Linked to 26/00352/LBC)

Documents

A01_DETAILS-WINDOWS
Drawing
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ACK-GENERAL LETTER (G/P/C)
Background Papers
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ACOUSTIC REPORT
Background Papers
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APPLICATIONFORMREDACTED
Application Form
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ATTACHMENTSUMMARY
Background Papers
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CNSLT-LA SOCIETY
Background Papers
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CNSLT-LA SOCIETY
Background Papers
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COVERING LETTER DECEMBER 2025
Background Papers
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DEMOLITION PLANS-PLANING - BASEMENT
Drawing
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DEMOLITION PLANS-PLANNING - FIRST FLOOR
Drawing
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DEMOLITION PLANS-PLANNING - GROUND FLOOR
Drawing
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DEMOLITION PLANS-PLANNING - THIRD FLOOR
Drawing
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DEMOLITION PLANS-PLANNING- ROOF
Drawing
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DEMOLITION PLANS-PLANNING- SECOND FLOOR
Drawing
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DEMOLITION PLANS-VOLUME
Drawing
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DEMOLITION SECTIONS-PLANNING - SECTION 3
Drawing
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DEMOLITION SECTIONS-PLANNING - SECTIONS 1 AND 2
Drawing
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DEMOLITION SECTIONS-PLANNING- SECTION 4
Drawing
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DETAILS - INTERNAL-RETAINED TIMBER FLOORS UPGRADE
Drawing
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DETAILS-EXTERNAL DOORS
Drawing
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DETAILS-FCU JOINERY
Background Papers
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DETAILS-FIRE RATED SECONDARY GLAZING (TYPE SG2 - FIX
Drawing
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DETAILS-FIRE RATED SECONDARY GLAZING (TYPE SG2 - UND
Drawing
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DETAILS-FIXED ROOFLIGHT
Drawing
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DETAILS-INTERNAL DOORS
Drawing
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DETAILS-INTERNAL GLAZING
Drawing
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DETAILS-SECONDARY GLAZING ELEVATIONS
Drawing
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DETAILS-WALK-ON ROOFLIGHT
Drawing
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ECNSLT-INTERNAL CONSULTS
Background Papers
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ECNSLT-INTERNAL CONSULTS
Background Papers
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EXISTING ELEVATIONS-PLANNING - COURTYARD
Drawing
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EXISTING ELEVATIONS-PLANNING - EAST AND WEST
Drawing
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EXISTING ELEVATIONS-PLANNING - LIGHTWELL
Drawing
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EXISTING ELEVATIONS-PLANNING - PARTY WALLS
Drawing
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EXISTING PLANS-GIA
Drawing
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EXISTING PLANS-PLANNING - BASEMENT
Drawing
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EXISTING PLANS-PLANNING - FIRST FLOOR
Drawing
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EXISTING PLANS-PLANNING - FIRST FLOOR MEZZ AND SECON
Drawing
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EXISTING PLANS-PLANNING - GROUND FLOOR
Drawing
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EXISTING PLANS-PLANNING - ROOF
Drawing
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EXISTING PLANS-PLANNING - SECOND FLOOR
Drawing
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EXISTING PLANS-PLANNING - THIRD FLOOR
Drawing
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EXISTING SECTIONS-PLANNING - 1 AND 2
Drawing
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EXISTING SECTIONS-PLANNING - 3
Drawing
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EXISTING SECTIONS-PLANNING - 4
Report
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FEECALCULATION
Background Papers
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HERITAGE STATEMENT V3
Heritage Statement
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LAND SWAP SCHEDULE
Background Papers
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LOCATION AND SITE-EXISTING SITE PLAN
Drawing
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LOCATION AND SITE-LOCATION PLAN
Drawing
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LOCATION PLAN
Drawing
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NEIGHBOUR NOTIFICATION LETTER (21D)
Background Papers
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PLANNING STATEMENT
Background Papers
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PROPOSED ELEVATIONS-PLANNING - COURTYARD
Drawing
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PROPOSED ELEVATIONS-PLANNING - EAST AND WEST
Drawing
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PROPOSED ELEVATIONS-PLANNING - LIGHTWELL
Drawing
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PROPOSED ELEVATIONS-PLANNING - PARTY WALLS
Drawing
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PROPOSED SECTIONS-PLANNING - 1 AND 2
Drawing
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PROPOSED SECTIONS-PLANNING - 3
Drawing
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PROPOSED SECTIONS-PLANNING - 4
Drawing
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RECEIPT OF APPLICATION
Other
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REPORTS - DESIGN AND ACCESSSTATEMENT
Design and Access Statement
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REPORTS-HISTORIC FABRICTREATMENT - PART 1
Background Papers
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REPORTS-HISTORIC FABRICTREATMENT - PART 2
Background Papers
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SCHEDULES-EXISTING RETAINED DOORS (EXT-INT)
Background Papers
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SCHEDULES-EXISTING RETAINED WINDOWS
Background Papers
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SCHEDULES-NEW EXTERNAL DOORS
Background Papers
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SCHEDULES-NEW INTERNAL DOORS
Background Papers
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SCHEDULES-NEW WINDOWS
Background Papers
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SCHEDULES-ROOFLIGHTS AND AOV
Background Papers
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SCHEDULES-SECONDARY GLAZING
Background Papers
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SITE NOTICE 21 OR 28 DAYS IF T&C APPL.
Background Papers
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SURVEY - PHOTOGRAPHIC RECORD - 38 PP - PART 1
Background Papers
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SURVEY - PHOTOGRAPHIC RECORD - 38 PP - PART 2
Background Papers
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SURVEY - PHOTOGRAPHIC RECORD - 9CMN
Background Papers
Not yet archived · Original link
SUSTAINABILITY SUMMARY-S2-P01
Background Papers
Not yet archived · Original link

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