Planning application
25/08845/FULL
Flat 5 Aquarius House 57A Lisson Street London NW1 5DA
Proposal
Replacement of the existing single glazed timber sash windows with double glazed timber sash windows to the front and rear elevations.
As published by the council, reference 25/08845/FULL
Timeline
Dates from the published record
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5 Dec 2025
Received by Westminster
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27 Mar 2026
Decision issued: Application Permitted
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20 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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26/04888/ADFULL Awaiting decision
Basement To First Floor Rear 63 Lisson Street London NW1 5DA
Detailed drawings showing the details of the lower ground floor doors, details of section drawings of the new front windows at scale 1:10, details in writing appropriate arrangements to secure measures to mitigate the potential increased demand for on-street residents car parking in the vicinity of the site, details of how waste is to be stored on site and how materials for recycling will be stored separately, detailed drawings and specifications of screening to courtyard at ground floor level and details of detailed site investigation pursuant to condition 4, 5, 8, 10, 12 & 13 of planning permission dated 31st July 2025 (RN:25/03614/FULL)
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25/08773/FULL Awaiting decision
63 Lisson Street London NW1 5DA
Erection of mansard roof extension to facilitate 1-bed self-contained flat, together with the replacement of existing fenestration and creation of a third floor terrace to the rear and associated external alterations.
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26/03089/FULL Awaiting decision
House 1 42 Bell Street London NW1 5AW
Erection of two additional floors and installation of a lift and new stairs to central courtyard at first floor level and conversion of the three five-storey houses to form nine new flats together with alterations to stairs and installation of bin and cycle stores within the central courtyard of the site.
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26/03881/FULL Awaiting decision
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26/01811/FULL Awaiting decision
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20/00153/ADFULL Refused
Basement And Ground Floor 67-69 Bell Street London NW1 6SX
Details of all new doors and windows and railings to the lightwells to the front elevation pursuant to planning permission dated 29th May 2019 (RN:18/10729).
Other full applications applications
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26/04829/ADFULL Granted
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26/04841/ADFULL Granted
29 Henstridge Place London NW8 6QD
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.