Planning application
21 Upper Montagu Street London W1H 2PQ
Works: Windows or glazing
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Replacement of single-glazed timber sash windows with slimline double-glazed timber sash windows to match the original in appearance, detailing and materials. (Linked to 25/08056/LBC)
As published by the council, reference 25/08055/FULL
Application record
- Reference
- 25/08055/FULL
- Type
- Full Planning Permission Application
- Status
- Pending
- Received
- 5 Nov 2025
- Validated
- 5 Nov 2025
- Ward
- Marylebone
- Postcode
- W1H 2PQ
Site history
Applications at this address on the Westminster register
This site has had 4 applications since 2025.
-
25/08056/LBC Awaiting decision
21 Upper Montagu Street London W1H 2PQ
Replacement of existing non-original single-glazed timber sash windows with new slimline double-glazed timber sash windows to match the original in appearance, detailing and materials. (Linked to 25/08055/FULL)
-
25/06220/FULL Withdrawn
21 Upper Montagu Street London W1H 2PQ
Careful dismantling and rebuilding of bowed flank elevation in matching/reused brickwork and replacement of existing timber joists to third floor. (Linked with 25/06221/LBC)
-
25/06221/LBC Withdrawn
21 Upper Montagu Street London W1H 2PQ
Careful dismantling and rebuilding of bowed flank elevation in matching/reused brickwork and replacement of existing timber joists to third floor. (Linked with 25/06220/FULL)
Timeline
Dates from the published record
-
5 Nov 2025
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 31 December 2025, 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.
Related applications
Cases linked to this one on the register
1 later application on the register refers to this one:
-
25/08056/LBC Awaiting decision
21 Upper Montagu Street London W1H 2PQ
Replacement of existing non-original single-glazed timber sash windows with new slimline double-glazed timber sash windows to match the original in appearance, detailing and materials. (Linked to 25/08055/FULL)
Who's behind it
Company information only, from the register and Companies House
Studio Hale Agent, registered in London
Active · incorporated 2023 · London
9 applications on PlanIndex · across 2 councils
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
16 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.
Watch members (£5 a month) open the document list from here.
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.
Nearby applications
Within 0.3 miles
-
21 Upper Montagu Street London W1H 2PQ
90% historically approved · decision due ~31 Dec
Replacement of existing non-original single-glazed timber sash windows with new slimline double-glazed timber sash windows to match the original in appearance, detailing and materials. (Linked to 25/08055/FULL)
Awaiting decision Heritage and listed buildings Windows or glazing 16 docs -
21 Upper Montagu Street London W1H 2PQ
Careful dismantling and rebuilding of bowed flank elevation in matching/reused brickwork and replacement of existing timber joists to third floor. (Linked with 25/06221/LBC)
Withdrawn Full applications 20 docs -
21 Upper Montagu Street London W1H 2PQ
Careful dismantling and rebuilding of bowed flank elevation in matching/reused brickwork and replacement of existing timber joists to third floor. (Linked with 25/06220/FULL)
Withdrawn Heritage and listed buildings 19 docs -
105A Crawford Street London W1H 2HU
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Decided Telecoms -
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Granted Advertising 2 docs -
25 Upper Montagu Street London W1H 1SA
87% historically approved · decision due ~6 Jan
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Awaiting decision Full applications 7 docs
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