Planning application
10 Warwick Street London W1B 5LZ
Works: Loft or dormer Windows or glazing
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Refurbishment of the existing five story building, including a new lift and stair core, refurbished office space including a new mezzanine, Replacement of all existing windows and doors, including the glazed screen at ground floor level. At roof level, a new terrace will be formed with a new low level glazed access. Existing mansard will have two new dormers and installation of a new condensor units located on an existing plant gantry on the rear facade.
As published by the council, reference 26/04660/FULL
Application record
- Reference
- 26/04660/FULL
- Type
- Full Planning Permission Application
- Status
- Pending
- Received
- 13 Jul 2026
- Validated
- 27 Jul 2026
- Ward
- West End
- Postcode
- W1B 5LZ
Timeline
Dates from the published record
-
13 Jul 2026
Received by Westminster
-
27 Jul 2026
Validated
Checked as complete and ready for consideration.
-
10 Aug 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 21 September 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 61 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
Agent on file, an architecture practice registered in London
7 applications on PlanIndex · across 3 councils
Trade members see who it is, their full track record, and every application they have filed.
See who's behind itDocuments
Plans, drawings, consultee responses and the officer's report
32 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.
Trade members open them from here.
Open the documentsWhat happens while it is decided
The process from here
This application is with Westminster for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
About full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
-
10 Warwick Street London W1B 5LZ
Replacement shopfront; creation of a roof terrace and erection of associated access structure; addition of two dormer windows to the existing mansard roof; and installation of a lift including lift/stair overrun extension.
Refused Full applications Extension Loft or dormer +1 34 docs -
6 Warwick Street London W1B 5LU
85% historically approved · decision due ~5 May
Display of internally illuminated projecting sign measuring 0.33m X 0.33m X 0.65m.
Awaiting decision Advertising 8 docs -
6 Warwick Street London W1B 5LU
Installation of new kitchen extraction equipment, ducting and associated works.
Withdrawn Full applications 23 docs -
Fintex House 19 Golden Square London W1F 9JJ
Detailed drawings of all new windows showing key junctions pursuant to condition 12 of planning permission dated 21 March 2017 (RN: 16/10726)
Granted Full applications Windows or glazing 10 docs -
1 Lower John Street London W1F 9DT
Display of a non illuminated scaffold shroud of a 1:1 replica facade measuring 15.50m height x 23.03m length across both Lower John Street and Brewer Street with a non-illuminated advertisement panel measuring 3.7m x 10.4m for a temporary period of six months.
Refused Advertising 16 docs -
First Floor To Third Floor 1 Lower John Street London W1F 9DT
Variation of condition 1 of planning permission dated 14th May 2025 (RN:24/08966/FULL) for the Erection of new mansard roof extension to building in connection with change of use of upper levels from restaurant (Use Class E(b)) to 2x1-bed flats and 1x2-bed maisonette (Use Class C3). Alterations to facade including replacement of single glazed windows with timber-framed slimline double-glazed windows at 1 Lower John Street. Increase height of chimney stack to boundary shared with 1 Lower John Street at 2 Lower John Street. Namely, amendments to the elevations to include air bricks and to retain the single soil vent to facilitate internal services arrangements (Application under section 73 of the Act)
Granted Full applications New dwelling Extension +2 13 docs
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