Flat 3 20A Seymour Street London W1H 7HX Data via plota.co.uk
Proposal
Layout changes including increasing size of bedroom, relocate bathroom door to create an en-suite, increase size of kitchen and divide box room to the lower floor to create a guest WC and Utility room. Data via plota.co.uk
Application progress
Approved on 6 Oct 2025 · Delegated Decision · Last checked 1 Nov 2026
Documents 15
Decision & officer reports 2
Statements & assessments 2
Plans & drawings 7
Application forms 1
Site constraints 12
Show the other 21 with distances
- 3 m1, New Quebec Street W1Grade II
- 16 m22-36, Seymour Street W1Grade II
- 16 m21-25, New Quebec Street W1Grade II
- 22 m4, New Quebec Street W1Grade II
- 23 m11-19, SEYMOUR STREET W1 (See details for further address information)Grade II
- 44 m7, New Quebec Street W1Grade II
- 48 m14-19, New Quebec Street W1Grade II
- 48 mChurch of the AnnuciationGrade II*
- 50 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
- 62 mMarylebone War MemorialGrade II
- 69 mNorthern Part of Mostyn HotelGrade II
- 75 m66-69, Upper Berkeley Street W1Grade II
- 76 mThe Montcalm Hotel (2 Wallenberg Place) and 42 Great Cumberland Place, with area railingsGrade II
- 111 m11 and 12, Upper Berkeley Street W1Grade II
- 124 m13 to 15, Upper Berkeley Street W1Grade II
- 131 m10, Portman Street W1Grade II
- 135 m16, Upper Berkeley Street W1Grade II
- 135 m35A, GREAT CUMBERLAND PLACE W1 (See details for further address information)Grade II
- 141 mVad Ladies ClubGrade II
- 148 m20, Montagu Street W1Grade II
- 148 mRoyal Intitute of British Architects Drawings CollectionGrade I
Checked on 1 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 March 2020, 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
- Listed Building Consent Application
- Postcode
- W1H 7HX
- Received
- 13 Aug 2025
- Validated
- 21 Aug 2025
- Ward
- Marylebone
- Case officer
- Show
- Target decision
- 16 Oct 2025
- Decision
- Application Permitted
- Decision date
- 6 Oct 2025
- Decision level
- Delegated Decision
- Applicant
- Show
- Agent
- Frankham Consultancy Group
How this decision compares
Decided in 46 days from validation, 11 days faster than Westminster's median of 57 for listed building works. Approved, as 90% of listed building works here are.
Plota live figures for listed building works decided by Westminster in the last twelve months, from validation. Westminster decision record →
Public comments
No public comments yet.
Last counted 1 Nov 2026
Consultation & key dates
- Alt. reference
- PP-14254066
- Planning Portal ref
- PP-14254066
- Comments by
- 1 Oct 2025
- Site or press notice
- 10 Sept 2025
- 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.
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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Flat 3 20A Seymour Street London W1H 7HX
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