34 Portland Place London W1B 1LX Data via plota.co.uk
Proposal
Alterations and extensions and use as a composite use comprising the Ambassador's dwellinghouse and as a Polish cultural centre and diplomatic premises (Sui Generis). [SITE INCLUDES 73 NEW CAVENDISH STREET] [Linked to 25/09187/LBC] Data via plota.co.uk
Application progress
Approved on 15 Oct 2026 · Delegated Decision · Last checked 18 Oct 2026
Documents 32
Decision & officer reports 2
Statements & assessments 8
Plans & drawings 9
Consultation & comments 3
Other documents 10
Associated applications 2
- Alterations and extensions and use as a composite use comprising the Ambassador's dwellinghouse and as a Polish cultural centre…
Site constraints 8
Show the other 26 with distances
- 20 m32, Portland Place W1Grade II
- 22 m73, New Cavendish Street W1Grade II
- 29 m26-30, Portland Place W1Grade II*
- 46 m27-35 Portland PlaceGrade II*
- 60 m17-21, Portland Place W1Grade II*
- 66 m8, Hallam Mews W1Grade II
- 80 m21, Duchess Mews W1Grade II
- 84 mBroadcasting HouseGrade II*
- 85 m19, Duchess Mews W1Grade II
- 89 m41-47, Portland Place W1Grade II*
- 89 m82, NEW CAVENDISH STREET W1 (See details for further address information)Grade II*
- 91 m17, Duchess Mews W1Grade II
- 93 m56 and 58, Portland Place W1Grade II*
- 97 mGeneral Medical CouncilGrade II
- 111 mStatue of Quintin Hogg (in Centre of Road Opposite North End of Broadcasting House)Grade II
- 112 m10, Duchess Street W1Grade II
- 113 mThe JackalopeGrade II
- 115 mStatue of Sir George Stuart White in Centre of Road South of Weymouth Street CrossingGrade II
- 116 m61 and 63, New Cavendish Street W1Grade II*
- 124 mNo 2 and Attached Railings No 4 and Attached RailingsGrade II
- 133 mChandos HouseGrade I
- 136 m15, Mansfield Street W1Grade II
- 136 mThe Royal Institute of British ArchitectsGrade II*
- 138 m126, Great Portland Street W1Grade II
- 138 m5-13, Mansfield Street W1Grade II*
- 140 m12, Weymouth Street W1Grade II
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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Important details
- Council
- Westminster
- Application type
- Full Planning Permission Application
- Postcode
- W1B 1LX
- Received
- 19 Dec 2025
- Validated
- 20 Feb 2026
- Ward
- West End
- Case officer
- Show
- Target decision
- 17 Apr 2026
- Decision
- Application Permitted
- Decision date
- 15 Oct 2026
- Decision level
- Delegated Decision
- Applicant
- Show
- Agent
- Cohanim Architecture
How this decision compares
Decided in 237 days from validation, 180 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
169 neighbours consulted · Last counted 18 Oct 2026
Consultation & key dates
- Alt. reference
- PP-14556289
- Planning Portal ref
- PP-14556289
- Comments by
- 1 May 2026
- Site or press notice
- 10 Apr 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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34 Portland Place London W1B 1LX
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