Planning application
PP/26/02421
3 Sloane Gardens, London, SW1W 8EA
Proposal
Extension of the existing building including a fifth-floor mansard roof extension and rear roof extension to provide 5 additional hotel bedrooms, with alterations to fenestration, installation of associated plant at roof level and associated external works.
As published by the council, reference PP/26/02421
Timeline
Dates from the published record
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27 Apr 2026
Received by Kensington and Chelsea
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22 Jun 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 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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PP/25/05984 Granted
11 Sloane Gardens, London SW1W 8EA
Replacement of all windows at front and rear elevations with timber double glazed units; upgrades to the facades; installation of new lift overrun at roof level and reactivation of original courtyard to the rear lower ground floor; as well as associated internal works to reconfigure the existing temporary sleeping accommodation
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LB/25/05745 Granted
2 Sloane Gardens, London, SW1W 8DL
Alterations to shopfront including lowering of windows, reinstatement of original entrance doors and fanlight and associated works; internal alterations, including restoration of historic features, removal of non-original partitions, revised ceiling arrangement; and reconfiguration of basement for back-of-house use with retention of historic masonry wall
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PP/25/05744 Granted
2 Sloane Gardens, London, SW1W 8DL
Alterations to shopfront including lowering of windows, reinstatement of original entrance doors and fanlight and associated works; internal alterations, including restoration of historic features, removal of non-original partitions, revised ceiling arrangement; and reconfiguration of basement for back-of-house use with retention of historic masonry wall
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CON/26/03047 Awaiting decision
2 Sloane Gardens, London, SW1W 8DL
Details required by condition 3 (Submission of details - (a) details of the waterproofing to the vaults) of listed building consent 25/05745 (Alterations to shopfront including lowering of windows, reinstatement of original entrance doors and fanlight and associated works; internal alterations, including restoration of historic features, removal of non-original partitions, revised ceiling arrangement; and reconfiguration of basement for back-of-house use with retention of historic masonry wall.).
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NMA/25/05416 Decided
Sloane Square House, 1 Holbein Place, London, SW1W 8NS
Non-material amendment to planning permission 22/05497 (Erection of two storey rear extension at 1st and 2nd floor level and associated amenity terrace, replacement of existing windows at 1st and 2nd floor level, erection of a new plant enclosure at 7th floor level, and insertion of PV panels to the roof.) to allow the amendment of conditions 3, 4, 5 and 6 and informative 2 so as to permit implementation of the Permission prior to commencement of physical construction of first and second floor rear extension.
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PP/21/00887 Withdrawn
Sloane Square House, 1 Holbein Place, London, SW1W 8NS
Installation of 12no. antennas (to be mounted on yoke bracket on new steelwork), 6no. radio cabinets, 3no. 300mm transmission dishes, and the addition of ancillary equipment thereto, including but not limited to, 15no. RRH's, 15no. ERS units, and 2no. GPS Modules, all at roof level.***WITHDRAWN***
Other full applications applications
In Kensington and Chelsea
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PP/18/01985 Withdrawn
Flat 3, 24 Cornwall Gardens, London, SW7 4AW
Works to second floor flat including erection of rear extension, creation of external roof terrace areas above and to rear of said extension (with perimeter metal railings), together with internal alterations including removal of internal wall between kitchen and living room, and other refurbishment works
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PP/26/02078 Granted
Ruskin House, 35A Hyde Park Gate, London, SW7 5DN
Installation of 2no. roof mounted ASHPs including acoustic enclosure / screening.
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PP/26/02247 Withdrawn
41 Halsey Street, London, SW3 2PT
Refinements to lower ground floor conservatory and basement extension through removal of low external wall, installation of full height sliding doors, and reinstatement of larger external steps. Replace glazed flat roof at ground floor level with glass-box extension incorporating solid floor structure and internal walk on rooflight. Installation of glazed sliding doors out to a Juliet balcony with metal railings balustrade. Create access from living room by lowering sill of window to form archway; Single-storey extension to closet wing, aligning depth with No.?40 Halsey Street. New timber-framed glazed doors to the rear of extended wing. Widening opening to half-level study within partition to accommodate new double doors. Sunroom will include full-height sliding doors and Juliet balcony with painted or PPC metal balustrades.
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PP/26/02237 Granted
134 Brompton Road, London, SW3 1HY and 5 Cheval place, London, SW7 1EW
Change of use from Use Class E to Restaurant (Use Class E(b)), new recessed front bifolding doors, awning, and signs at front and rear, replace rooflights to double glazed hipped white UPVC/aluminium painted white, replace rear doors to match existing
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PP/26/02978 Granted
59A Palace Gardens Terrace, London, W8 4RU
Variation of Condition 2 (Compliance with approved drawings) of planning permission Ref. PP/24/07747 dated 28th February 2025, to replace proposed front and rear elevation drawings with new proposed drawings representing modest elevational changes of main building at first floor level only.