Planning application
PP/26/01787
Campden Mansions, 9 Kensington Mall, London, W8 4DU
Proposal
Construction of mansard roof extension to create new flat (Use Class C3)
As published by the council, reference PP/26/01787
Timeline
Dates from the published record
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16 Mar 2026
Received by Kensington and Chelsea
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20 Jul 2026
Added to PlanIndex
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1 Aug 2026
Status changed to Pre-Determination Stage
Previously Validated and Registered.
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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 Kensington and Chelsea 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 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/25/04590 Granted
8 Rabbit Row, London, W8 4DX
Alterations to fenestration, installation of 10no solar PV panels to main flat roof and installation of 2no walk-on glazed rooflights to single storey flat roof.
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PP/26/00115 Granted
10 Strathmore Gardens, London, W8 4RZ
Variation of Condition 2 (Approved drawings) of PP/24/08551 (External alterations; reinstatement of first floor rear terraces; alterations to fenestration - rearrangement of windows at rear extension; excavation at lower ground floor to form a swimming pool with associated plant at first floor and roof levels; and installation of liftshaft housing for internal lift to serve all levels) to allow for amendments to door opening, terrace levels and lift position, amendment/removal of skylights, and internal reconfigurations.
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CON/25/04523 Granted
10 Strathmore Gardens, London, W8 4RZ
Details required by Condition 9 (CTMP) of planning permission ref. PP/24/08551 dated 28th February 2025 (External alterations; reinstatement of first floor rear terraces; alterations to fenestration - rearrangement of windows at rear extension; excavation at lower ground floor to form a swimming pool with associated plant at first floor and roof levels; and installation of lift shaft housing for internal lift to serve all levels).
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PP/26/02812 Granted
57 Palace Gardens Terrace, London, W8 4RU
Rearrangement of front and rear fenestration.
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ARB/26/03101 Refused
57 Palace Gardens Terrace, London, W8 4RU
FELL 1 x Common Lime (T1) at front of property.
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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.
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.