Planning application
26/03450/LBC
Flat 7 42 Leinster Square London W2 4PU
Proposal
Retrospective application for alterations to top floor flat including removal of ceiling in reception room and bedroom; installation of mezzanine to bedroom; creation of escape dormer in roof space; insertion of rooflights and associated works.
As published by the council, reference 26/03450/LBC
Timeline
Dates from the published record
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26 May 2026
Received by Westminster
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31 May 2026
Validated
Checked as complete and ready for consideration.
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21 Jul 2026
Added to PlanIndex
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Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What 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 heritage and listed buildings applications
How this application type works
Heritage applications concern listed buildings and conservation areas. Listed building consent is needed for works, inside or out, that affect the special interest of a listed building, and carrying out such works without consent is a criminal offence. The council weighs harm to the heritage asset against any public benefit of the proposal.
More on heritage and listed buildings applications in our guide
Nearby applications
Within 500 metres
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26/04426/FULL Awaiting decision
Fourth Floor Flat 44 Leinster Square London W2 4PU
Installation of railings to terrace and removal of lighting on roof. [Linked to 26/04427/LBC]
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26/04427/LBC Awaiting decision
Fourth Floor Flat 44 Leinster Square London W2 4PU
Installation of railings to terrace and removal of lighting on roof. [Linked to 26/04426/FULL]
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25/06352/ADFULL Awaiting decision
26 Leinster Square London W2 4NQ
Details of implementation of Energy Reduction Scheme pursuant top condition 6 of a appeal decision dated 5th August 2025 (APP/X5990/W/25/3361064).
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22/04041/ADFULL Refused
26 Leinster Square London W2 4NQ
Details of Operational Management Plan (OMP), detailed drawings of a soft landscaping scheme for the rear communal garden, how waste is to be stored on site and how materials for recycling will be stored separately and written approval details of how the development will reduce on-site energy demand pursuant to condition 3, 7, 9 & 10 of planning permission dated 29th November 2021 (RN: 21/04569/FULL).
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25/08114/LBC Awaiting decision
Flat 4 52 - 53 Leinster Square London W2 4PU
Internal alterations to reconfigure the layout of the second floor flat including the addition of 1no. bedroom and relocation of the kitchen including upgrades to existing lighting and small power.
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25/07611/CLEUD Awaiting decision
63 Prince's Square London W2 4PX
Use of 63 Princes Square as a hostel offering cheap accommodation to visitors (tourist accommodation).
Other heritage and listed buildings applications
In Westminster
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26/04984/LBC Awaiting decision
47G Randolph Avenue London W9 1BQ
Installation of replacement fire surround.
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26/04997/LBC Awaiting decision
Hanover Lodge Outer Circle Regent's Park London NW1 4HB
Erection of a morning room side extension. (Linked to 26/04996/FULL)
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26/04979/LBC Awaiting decision
12 Brewer Street London W1F 0SF
Internal alterations including removal of internal enclosures; Replacement flooring, shelving and slatwall systems, staircase handrail repair and other associated joinery works.
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26/04987/LBC Awaiting decision
Basement And Ground Floor 8 Ganton Street London W1F 7QL
Repainting of the existing timber shopfront, hand-painted fascia lettering, installation of a new hanging sign using the existing projecting sign bracket, and installation of a discreet fascia-mounted LED trough light.
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26/04995/LBC Awaiting decision
Hanover Lodge Outer Circle Regent's Park London NW1 4HB
Erection of rear conservatory extensions and an entrance loggia to side with roof terrace above, together with associated landscaping and alterations. (Linked with 26/04994/FULL)