Planning application
CL/25/06114
21 Carlyle Square, London, SW3 6EY
Proposal
Replacement of existing timber windows for double glazed timber windows, without any change in appearance and design, on all elevations (Certificate of Proposed Development/Use)
As published by the council, reference CL/25/06114
Timeline
Dates from the published record
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6 Oct 2025
Received by Kensington and Chelsea
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2 Apr 2026
Decision issued: Grant Planning Permission/Consent
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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 lawful development applications
How this application type works
A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.
Nearby applications
Within 500 metres
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PP/25/06108 Granted
21 Carlyle Square, London, SW3 6EY
Replacement of rear ground floor windows to doors; rear door replacement; raised rear balcony balustrade; insertion of front lightwell railing and gate; replacement side access gate; basement window grilles; and new Crittall-style replacement windows.
-
ARB/25/05967 Granted
20 Carlyle Square, London, SW3 6EY
Prune 1x Magnolia (Magnolia spp) at front
-
PP/25/05635 Granted
21A Carlyle Square, London, SW3 6EY
Removal of condition 2 (use of roof as terrace precluded) and variation of condition 1 (approved drawings) of planning permission 21/03923 to allow the roof of the rear extension to be used as a roof terrace
-
PP/26/03140 Granted
19 Carlyle Square, London, SW3 6EY
Replacement of existing windows on front, side and rear elevations with like for like double glazed windows.
-
ARB/26/00721 Granted
24 Carlyle Square, London, SW3 6EY
Prune 1x mature Maple
-
PP/25/05633 Granted
38 Chelsea Square, London, SW3 6LH
Variation of condition 2 (approved drawings) of planning permission 23/08025 to allow removal of rainwater attenuation tank from basement and relocation to lower ground floor providing equivalent level of attenuation as the approved tank; addition of bathroom window on West elevation measuring 500mm x 700mm; and installation of additional skylight to main roof
Other lawful development applications
In Kensington and Chelsea
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CL/26/01267 Granted
1 Bray Place, London, SW3 3LL
Confirmation that the existing structure at no. 27 Coulson Street / 1 Bray Place was built in the early 1970s as a single development over three floors (basement to first floor) after the demolition of a previous infill building in 1971 (Certificate of Lawful Existing Use)
-
CL/26/02700 Granted
27 Lansdowne Road, London, W11 3AG
Provision of lead flashing to parapet/cornice lines and painting of windows and existing painted areas of the building in soft white (Certificate of Proposed Use/Development).
-
CL/26/02515 Granted
Flats A and C, 61 Holland Park, London, W11 3SJ
Reconfiguration of the accommodation at Flat A and Flat C to create one four-bed dwelling and one one-bed dwelling (Certificate of Lawful Proposed Development / Use)
-
CL/26/03998 Awaiting decision
87 Addison Road, London, W14 8ED
Confirmation that the existing A/C Units & Screening to the north and south sides on the flat roofs at ground and first floor levels are lawful (Certificate of Lawful Existing Use/Development)
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CL/26/04000 Awaiting decision
191 Freston Road, London, W10 6TH
Confirmation that the use of the property as Class F1(a) (Education) is lawful (Certificate of Lawful Existing Use/Development)