Abercorn School 38 Portland Place London W1B 1LS Data via plota.co.uk
Proposal
Use of all floor levels at 38 Portland Place as Class E (office use) and residential (Class C3) at 9 Cavendish Mews north, 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, new external fire escape stair, creation of new terraces to office space in connection with plant space and the installation of air source heat pumps, internal alterations throughout, external alterations to the front and rear facades of the mews building, internal alterations to create new residential units, creation of new terrace spaces (Linked to 26/00352/LBC) Data via plota.co.uk
Application progress
Approved on 9 Jul 2026 · Delegated Decision · Last checked 23 Sept 2026
Documents 91
Decision & officer reports 2
Statements & assessments 8
Plans & drawings 57
Application forms 2
Consultation & comments 1
Other documents 21
Associated applications 3
- FullUse of all floor levels at 38 Portland Place as Class E (office use) and residential (Class…This application26/00351/FULL
Conditions 14 awaiting decision
Site constraints 8
Show the other 27 with distances
- 24 m73, New Cavendish Street W1Grade II
- 37 m32, Portland Place W1Grade II
- 47 m27-35 Portland PlaceGrade II*
- 47 m26-30, Portland Place W1Grade II*
- 50 m8, Hallam Mews W1Grade II
- 75 m41-47, Portland Place W1Grade II*
- 75 m56 and 58, Portland Place W1Grade II*
- 75 m17-21, Portland Place W1Grade II*
- 87 mGeneral Medical CouncilGrade II
- 92 m21, Duchess Mews W1Grade II
- 96 m82, NEW CAVENDISH STREET W1 (See details for further address information)Grade II*
- 97 mStatue of Sir George Stuart White in Centre of Road South of Weymouth Street CrossingGrade II
- 98 m19, Duchess Mews W1Grade II
- 102 mBroadcasting HouseGrade II*
- 105 m17, Duchess Mews W1Grade II
- 109 mThe JackalopeGrade II
- 117 mThe Royal Institute of British ArchitectsGrade II*
- 118 m61 and 63, New Cavendish Street W1Grade II*
- 122 m12, Weymouth Street W1Grade II
- 127 m10, Duchess Street W1Grade II
- 129 mStatue of Quintin Hogg (in Centre of Road Opposite North End of Broadcasting House)Grade II
- 138 mNo 2 and Attached Railings No 4 and Attached RailingsGrade II
- 142 m15, Mansfield Street W1Grade II
- 143 m22, Weymouth StreetGrade II
- 145 m5-13, Mansfield Street W1Grade II*
- 145 m126, Great Portland Street W1Grade II
- 149 mChandos HouseGrade I
Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the Planning Inspectorate, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.
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Details of installation of services and related fixtures pursuant to condition 8...
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Important details
- Council
- Westminster
- Application type
- Full Planning Permission Application
- Postcode
- W1B 1LS
- Received
- 21 Jan 2026
- Validated
- 21 Jan 2026
- Ward
- West End
- Case officer
- Show
- Target decision
- 18 Mar 2026
- Decision
- Application Permitted
- Decision date
- 9 Jul 2026
- Decision level
- Delegated Decision
- Applicant
- Show
- Agent
- Howard de Walden Estates ltd
How this decision compares
Decided in 169 days from validation, 112 days slower than Westminster's median of 57 for changes of use. Approved, as 83% of changes of use here are.
Plota live figures for changes of use decided by Westminster in the last twelve months, from validation. Westminster decision record →
Public comments
No public comments yet.
14 neighbours consulted · Last counted 23 Sept 2026
Consultation & key dates
- Alt. reference
- PP-14495608
- Planning Portal ref
- PP-14495608
- Comments by
- 27 Mar 2026
- Site or press notice
- 6 Mar 2026
- Env. assessment
- No
Historical activity at this location
25 nearby applications on record - archival context, not part of the live application.
Nearby activity
Westminster is slower than most councils at deciding householder applications, ranking #258 out of 296. Only 28% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Westminster is also one of the strictest councils - it refuses more householder applications than almost any other, with only 81% approved vs 90% nationally.
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Abercorn School 38 Portland Place London W1B 1LS
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