Planning application
10 Great Castle Street London W1W 8LP
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Variation of condition 4 of planning permission dated 15th August 2024 (RN 24/02645/FULL) for the installation of diesel back-up generator on the first floor terrace. NAMELY, to amend the condition to clarify that the generator may be used to maintain essential operational, financial, and security systems during power outages; Confirm that it will not be used for commercial energy supply or grid-support services such as STOR; and Retain the approved noise limits and testing restrictions to ensure there is no additional environmental impact.
As published by the council, reference 26/01708/FULL
Application record
- Reference
- 26/01708/FULL
- Type
- Full Planning Permission Application
- Status
- Pending
- Received
- 17 Mar 2026
- Validated
- 17 Mar 2026
- Ward
- West End
- Postcode
- W1W 8LP
Timeline
Dates from the published record
-
17 Mar 2026
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 12 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 91 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
Tye Architects Agent, an architecture practice registered in Bedford
Active · incorporated 2019 · Bedford
18 applications on PlanIndex · across 13 councils · 80% 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
9 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 119 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
-
Walmar House 296 Regent Street London W1B 3AP
88% historically approved · decision due ~3 Mar
Installation of new rotating entrance door and accessible door; removal of existing sliding entrance doors and internal lobby doors; installation of air curtain, new flooring, new lighting fixtures and new security gate. [Linked to 26/00057/LBC]
Awaiting decision Full applications 22 docs -
Star House 15 - 17 Great Portland Street London W1W 8QA
Amendments to planning permission dated 15 May 2025 (RN: 25/02032/FULL) for; Removal of navy blue aluminium panels to side elevation (external ATM area) and replacement with decorative 3D tiles at ground floor level on the Great Castle Street elevation of the building NAMELY, alterations to the approved materials.
Granted Amendments 7 docs -
19 - 21 Great Portland Street London W1W 8QB
Display for a temporary period of six months of a non-illuminated 'to let' board attached to the railings in front of the building at street level and measuring 0.45m x 0.6m
Granted Advertising 8 docs -
Walmar House 296 Regent Street London W1B 3AP
90% historically approved · decision due ~3 Mar
Installation of new rotating entrance door and accessible door; removal of existing sliding entrance doors and internal lobby doors; installation of air curtain, new flooring, new lighting fixtures and new security gate. [Linked to 26/00056/FULL]
Awaiting decision Heritage and listed buildings 22 docs -
Ground Floor 52 - 53 Margaret Street London W1W 8SQ
Display of externally illuminated signage measuring 0.61m x 0.4m and internally illuminated (letters only) projecting sign measuring 0.5m x 0.5m.
Granted Advertising 16 docs -
23 - 25 Great Portland Street London W1W 8QD
Installation of a new external duct in the rear lightwell to terminate at high level.
Granted Full applications 34 docs
Other full applications
In Westminster
-
26/07528/FULL Awaiting decision
69 Eaton Place London SW1X 8DF
Installation of new cast iron water pipe on rear courtyard elevation. (Linked with 26/07529/LBC)
-
26/05200/FULL Decided
1 The Court House 165 Seymour Place London W1H 4PU
Installation of waterproofing system to the existing lead flat roofs
-
26/07521/FULL Awaiting decision
Flat 18 Harlequin Court 20 Tavistock Street London WC2E 7NZ
Installation of one external condenser unit
-
26/07508/FULL Awaiting decision
Buckingham Palace The Mall London SW1A 1AA
Replacement of existing security lighting to the Buckingham Palace Forecourt with 80 compact LED spotlights installed within the lantern clusters across 10 principal piers, with associated concealed cabling and reversible fixings. (Linked with 26/07509/LBC)
-
26/07472/FULL Awaiting decision
Flat 3 82 New Cavendish Street London W1G 9TA
Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07473/LBC)