Planning application
25/08948/FULL
The Dilly 21 Piccadilly London W1J 0BH
Proposal
New external roof top plant and new ventilation ductwork to rear elevation. (Linked to 25/08949/LBC)
As published by the council, reference 25/08948/FULL
Timeline
Dates from the published record
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9 Dec 2025
Received by Westminster
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24 Feb 2026
Validated
Checked as complete and ready for consideration.
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20 Jul 2026
Decision issued: Application Permitted
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29 Jul 2026
Added to PlanIndex
What a grant of permission means
The process from here
Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.
Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.
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
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25/08949/LBC Granted
The Dilly 21 Piccadilly London W1J 0BH
New external roof top plant and new ventilation ductwork to rear elevation. (Linked to 25/08948/FULL)
-
25/09142/LBC Granted
The Dilly 21 Piccadilly London W1J 0BH
Internal works to refurbish the existing ground floor entrance bar and restaurant area
-
26/00445/LBC Awaiting decision
The Dilly 21 Piccadilly London W1J 0BH
Internal refurbishment and redecoration of 283 guest rooms and corridors, floor levels 1 to 9.
-
25/08908/LBC Granted
The Dilly 21 Piccadilly London W1J 0BH
Repair works to existing plaster ceiling in hotel restaurant kitchen.
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26/02808/LBC Awaiting decision
The Dilly 21 Piccadilly London W1J 0BH
Retrospective application for internal refurbishment of Level 2 lift lobby.
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25/05198/FULL Granted
The Dilly 21 Piccadilly London W1J 0BH
Update of the MEP infrastructure to include internal works to refurbish the existing internal roof top plant room with new external acoustic louvres and new external roof top plant.
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Details of the facing materials you will use, including glazing, and elevations and roof plans annotated to show where the materials are to be located pursuant to condition 5 of planning permission dated 18th November 2025 (RN:25/06159).
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26/04989/FULL Awaiting decision
1 Kildare Terrace London W2 5JT
Erection of a mansard roof extending over the main house and side wing, replacement lower ground rear extension with roof terrace above, lowering of lower ground floor slab, installation of an air source heat pump in rear garden, new front boundary treatment, and new second floor window on the north elevation.
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26/04986/FULL Awaiting decision
Inver Court Inverness Terrace London W2 6JB
Replacement of combustible materials in the render facades; timber decking and plastic soffits/ fascias to terraces with non-combustible materials on the 5th and 6th floors.