Planning application
Flat 4 St Davids House 16 New Cavendish Street London W1G 8UP
Works: Loft or dormer
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Alterations to the uppermost storey of Flat 4, involving the removal of two existing rear dormers and the construction of a single replacement rear dormer, like-for-like replacement of existing roof terrace railings and decking, and internal alterations including the replacement of existing modern kitchen fittings and associated joinery. (Linked to 26/01857/LBC)
As published by the council, reference 26/01855/FULL
Application record
- Reference
- 26/01855/FULL
- Type
- Full Planning Permission Application
- Status
- Pending
- Received
- 23 Mar 2026
- Validated
- 23 Mar 2026
- Ward
- Marylebone
- Postcode
- W1G 8UP
Site history
Applications at this address on the Westminster register
This site has had 2 applications since 2026.
-
26/01857/LBC Awaiting decision
Flat 4 St Davids House 16 New Cavendish Street London W1G 8UP
Alterations to the uppermost storey of Flat 4, involving the removal of two existing rear dormers and the construction of a single replacement rear dormer, like-for-like replacement of existing roof terrace railings and decking, and internal alterations including the replacement of existing modern kitchen fittings and associated joinery. (Linked to 26/01855/FULL)
Timeline
Dates from the published record
-
23 Mar 2026
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 18 May 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Westminster took a median of 66 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
Bonnystreet (Town) Planning Limited Agent, a planning consultancy
17 applications on PlanIndex · across 9 councils · 73% granted
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
17 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
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Open the documentsWhat happens while it is decided
This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided full applications in a median of 91 days. More in our guide to how long planning decisions take.
About full applications
A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.
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Flat 4 St Davids House 16 New Cavendish Street London W1G 8UP
90% historically approved · decision due ~18 May
Alterations to the uppermost storey of Flat 4, involving the removal of two existing rear dormers and the construction of a single replacement rear dormer, like-for-like replacement of existing roof terrace railings and decking, and internal alterations including the replacement of existing modern kitchen fittings and associated joinery. (Linked to 26/01855/FULL)
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