Planning application
26/02183/CLEUD
46 Portland Place London W1B 1NF
Proposal
Confirmation on planning permission have been lawfully implemented by carrying out a material operation at the site, in accordance with the approved plans (Variation of condition 1 of planning permission dated 29 April 2016 (RN 14/12563/FULL) for the demolition of the rear extension to the building at lower ground, mezzanine, ground and first floor levels and rebuilding to include the creation of a terrace at rear first floor level. Excavation of additional basement levels and installation of plant at main roof and basement level all in association with the use of the property as a single family dwelling (Class C3) from RN 14/12563/FULL. NAMELY, to vary the approved drawings to enable additional excavation at basement levels, installation of photovoltaics at roof level, enlargement of the openings at ground and first floors, to change a window to a door to provide access to the terrace at rear first floor level and to alter the fenestration of the front elevation to the orangery with internal alterations at all floor levels)
As published by the council, reference 26/02183/CLEUD
Timeline
Dates from the published record
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1 Apr 2026
Received by Westminster
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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 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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26/04128/LBC Awaiting decision
46 Portland Place London W1B 1NF
Internal alterations to the rear of the first floor comprise the removal of existing non-original internal partitions associated with the WC/shower block and kitchen within the closet wing. All fixtures, fittings, and non-original doors within these areas will be removed. Suspended ceilings will also be taken down to reinstate the original ceiling heights and proportions of the principal rooms. The proposals include the installation of a new WC and tea point, together with associated partitioning. In addition, a new opening will be formed to provide a visual and physical connection between the library/study and the rear seating area. This will be detailed with matching cornices and skirtings to ensure the works are sympathetic to, and consistent with, the character and appearance of the existing historic fabric.
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26/04113/LBC Awaiting decision
46 Portland Place London W1B 1NF
Installation of replacement all non-original windows and relevant external glazed doors with new painted windows and new glazed painted external doors together with reinstatement of suitable joinery profiles throughout.
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25/08376/FULL Awaiting decision
52 Portland Place London W1B 1NH
Demolition, refurbishment, restoration and alterations to 52 Portland Place as well as removal of existing external condensers at basement, ground, third and fourth floor level and provision of new, consolidated plant and screening at basement and third floor level alongside other associated works. (Linked with 25/08377/LBC)
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25/08377/LBC Awaiting decision
52 Portland Place London W1B 1NH
Demolition, refurbishment, restoration and alterations to 52 Portland Place as well as removal of existing external condensers at basement, ground, third and fourth floor level and provision of new, consolidated plant and screening at basement and third floor level alongside other associated works. (Linked with 25/08376/FULL)
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25/06141/NMA Granted
4 - 5 Cavendish Mews North London W1W 6LA
Amendments to planning permission dated 12th June 2024 (RN:24/00473/FULL) for Erection of a roof extension and alterations to the front elevation to enlarge and alter residential dwelling (Class C3) namely, the repositioning of windows to function as a skylight within the second floor mansard roof, the northernmost rooflight to be repositioned to serve as a secondary means of escape, the northernmost window at first floor level to be reconfigured to match the positioning of the existing surveyed windows and the omission of two rooflights.
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26/00516/NMA Granted
4 - 5 Cavendish Mews North London W1W 6LA
Amendments to planning permission dated 12th June 2024 (RN 24/00473/FULL) for the erection of a roof extension and alterations to the front elevation to enlarge and alter residential dwelling (Class C3). NAMELY, roof extension reprofiling.
Other lawful development applications
In Westminster
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26/04958/CLEUD Awaiting decision
1 Sussex Square London W2 2SJ
Use of a building as mixed use as C3 (single residential dwelling) and C1 (short-stay accommodation)
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26/04971/CLOPUD Awaiting decision
Flat 23 192 Emery Hill Street London SW1P 1PN
Replacement of the existing single-glazed moving window sashes, casement panels, and balcony door leaves with slimline double-glazed timber units. The existing outer timber frames fixed into the building will be retained and will not be removed or altered. The replacement units will match the existing windows in material, design, glazing bar pattern, opening method, dimensions, and external appearance. No alterations are proposed to the building structure, external walls, openings, or window frame sizes. No new access, alterations to existing access, new streets, hardstandings, means of enclosure, or drainage works are proposed. The precise location and details of the replacement windows are shown on the accompanying drawings.
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26/04832/CLEUD Awaiting decision
Basement Flat 117 Kilburn Park Road London NW6 5LB
Use or Development in respect of the detached single-storey outbuilding within the rear garden of the applicants property.
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26/04856/CLOPUD Awaiting decision
Flat 15 192 Emery Hill Street London SW1P 1PN
Replacement of the existing single-glazed moving sashes, casement panels, and balcony door leafs with slimline double glazed timber units within the fully retained existing external timber frames.
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26/04632/CLOPUD Awaiting decision
165 Oliphant Street London W10 4EA
Installation of solar panels to generate clean, renewable energy from sunlight and reduce reliance on grid electricity and fossil fuels.