1 Berkeley Mews London W1H 7AT Data via plota.co.uk
Proposal
Details of new windows and doors pursuant to condition 9 of planning permission dated 22 May 2024 (RN: ). Data via plota.co.uk
Application progress
Approved on 1 Oct 2025 · Delegated Decision · Last checked 18 Oct 2026
Documents 16
Decision & officer reports 3
Plans & drawings 10
Application forms 1
Associated applications 6
Site constraints 11
Show all 24 with distances
- 3 m10-20, Seymour Street W1Grade II
- 19 m4, New Quebec Street W1Grade II
- 23 m1, New Quebec Street W1Grade II
- 35 m7, New Quebec Street W1Grade II
- 37 m11-19, SEYMOUR STREET W1 (See details for further address information)Grade II
- 42 m21-25, New Quebec Street W1Grade II
- 43 m22-36, Seymour Street W1Grade II
- 53 m14-19, New Quebec Street W1Grade II
- 53 mNorthern Part of Mostyn HotelGrade II
- 74 mWestern Marble Arch Synagogue (1 Wallenberg Place and 13 Quebec Mews), 24 Great Cumberland Place and 38 Seymour Street, with area railings, and standard lanterns to 38 Seymour StreetGrade II
- 75 mChurch of the AnnuciationGrade II*
- 76 m66-69, Upper Berkeley Street W1Grade II
- 88 mMarylebone War MemorialGrade II
- 91 mThe Montcalm Hotel (2 Wallenberg Place) and 42 Great Cumberland Place, with area railingsGrade II
- 112 m11 and 12, Upper Berkeley Street W1Grade II
- 120 mRoyal Intitute of British Architects Drawings CollectionGrade I
- 120 m10, Portman Street W1Grade II
- 128 mHome House (Courtauld Institute)Grade I
- 131 m13 to 15, Upper Berkeley Street W1Grade II
- 142 m20, Montagu Street W1Grade II
- 142 mCourtauld Institute, Eastern PartGrade II
- 144 m16, Upper Berkeley Street W1Grade II
- 148 m19, Montagu Street W1Grade II
- 150 mVad Ladies ClubGrade II
Checked on 2 November 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.
Building
From the energy performance certificate lodged in November 2013, the latest held for this property. The building may have changed since. View the certificate
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Important details
- Council
- Westminster
- Application type
- Approval of Details (Full PP)
- Postcode
- W1H 7AT
- Received
- 18 Sept 2025
- Validated
- 18 Sept 2025
- Ward
- Marylebone
- Case officer
- Show
- Target decision
- 13 Nov 2025
- Decision
- Application Permitted
- Decision date
- 1 Oct 2025
- Decision level
- Delegated Decision
- Applicant
- Show
- Agent
- Garnett Architecture LLP
Public comments
No public comments yet.
Last counted 18 Oct 2026
Consultation & key dates
- Alt. reference
- PP-14336763
- Planning Portal ref
- PP-14336763
- Env. assessment
- No
Historical activity at this location
29 previous applications on record - archival context, not part of the live application.
Previous applications at this address
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.
Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.
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1 Berkeley Mews London W1H 7AT
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Referenced application
Council archive
1 - 2 Berkeley Mews London W1H 7AT
Partial demolition behind partially retained facades, use of 2 Berkeley Mews as office accommodation (Class E) and amalgamation with existing office (class E) use at 1 Berkeley Mews, associated internal and external alterations, provision of external plant and repair works all in connection with a land use swap with 28 Dorset Street (RN: 23/07147/FULL).
- Received
- 13 Oct 2023
- Decided
- 22 May 2024
- Outcome
- Approved
28 Dorset Street London W1U 8AR
Use of office accommodation (Class E) to a single residential dwelling (Class C3) including rebuilding of rear extension at rear lower ground floor level, provision of external plant within rear courtyard; and other associated works, all in connection with the land use swap with 1-2 Berkeley Mews (RN:23/07126/FULL).
- Received
- 13 Oct 2023
- Decided
- 22 May 2024
- Outcome
- Approved