Planning application
11 - 12 William Street London SW1X 9HL
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Minor internal works to lower floors and installation of part external goods lift. [Linked to 26/02237/FULL]
As published by the council, reference 26/02238/LBC
Application record
- Reference
- 26/02238/LBC
- Type
- Listed Building Consent Application
- Status
- Pending
- Received
- 2 Apr 2026
- Validated
- 2 Apr 2026
- Ward
- Knightsbridge & Belgravia
- Postcode
- SW1X 9HL
Site history
Applications at this address on the Westminster register
This site has had 3 applications since 2026.
-
26/06243/ADFULL Awaiting decision
11 - 12 William Street London SW1X 9HL
Details of the ventilation system to get rid of cooking smells, including details of how it will be built and how it will look pursuant to condition 8 of planning permission dated 1st May 2024 (RN 24/01192/FULL)
-
26/02237/FULL Awaiting decision
11 - 12 William Street London SW1X 9HL
Minor internal works to lower floors and installation of part external goods lift. [Linked to 26/02238/LBC]
Timeline
Dates from the published record
-
2 Apr 2026
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 28 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
Monmouth Planning Ltd Agent, a planning consultancy registered in London
Active · incorporated 2014 · London
79 applications on PlanIndex · across 9 councils · 89% 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
19 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 heritage and listed building applications in a median of 94 days. More in our guide to how long planning decisions take.
About heritage and listed building applications
Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
11 - 12 William Street London SW1X 9HL
89% historically approved · decision due ~6 Nov
Details of the ventilation system to get rid of cooking smells, including details of how it will be built and how it will look pursuant to condition 8 of planning permission dated 1st May 2024 (RN 24/01192/FULL)
Awaiting decision -
11 - 12 William Street London SW1X 9HL
87% historically approved · decision due ~28 May
Minor internal works to lower floors and installation of part external goods lift. [Linked to 26/02238/LBC]
Awaiting decision Full applications 20 docs -
8 - 9 William Street London SW1X 9HL
84% historically approved · decision due ~16 Jun
Display of internally illuminated fascia sign measuring 0.833m X 0.31m and 0.833m X 0.31m
Awaiting decision Advertising 8 docs -
5 - 6 William Street London SW1X 9HL
Installation of seven new French doors with fanlights at front elevation facing William Street; three pairs of sash windows into existing timber box frames; one new single door, including a sidelight and fanlight at rear elevation; and other associated works to first floor.
Granted Heritage and listed buildings Windows or glazing 18 docs -
81 Knightsbridge London SW1X 7RB
Alterations to shopfront on William Street including installation of an internally illuminated (backlit) fascia sign measuring 1.14m x 0.14m, an internally illuminated (backlit) fascia sign to the entrance to No. 93 and internally illuminated (backlit) projecting signs to Nos. 81 to 93 each measuring 0.55m x 0.35m. Internal alterations at ground and basement levels.
Granted Heritage and listed buildings Windows or glazing 21 docs -
81 Knightsbridge London SW1X 7RB
87% historically approved · decision due ~19 Jun
Details of operational managment plan pursuant to Condition 4 of planning permission dated 02 April 2025 (RN: 24/08131/FULL).
Awaiting decision Full applications 4 docs
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Replacement of existing first-floor sash windows to the front and rear elevations with traditionally detailed painted timber, slim-profile double-glazed sash windows. (Linked to 26/06317/FULL)
-
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Replacement of sashes in two front windows at 2nd floor level and one rear window with slimline double glazed timber sashes. (Linked with 26/04142/FULL)