Planning application
26/00554/LBC
23 Grafton Street London W1S 4EY
Proposal
Phased development including retention of rear basement roof slab (previously proposed for demolition and replacement), infilling of void creating an internal lightwell and the creation of a rear extension at ground floor. Removal of rear ground floor toilet block and external fire escape stairs. Demolition of existing, altered mansard roof and construction of a new mansard roof with dormer windows and concealed plant enclosure. Extension of existing lift to serve fourth floor. Replacement of third floor rear windows with double glazed sash windows. Minor internal reconfigurations.
As published by the council, reference 26/00554/LBC
Timeline
Dates from the published record
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30 Jan 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 heritage and listed buildings applications
How this application type works
Heritage applications concern listed buildings and conservation areas. Listed building consent is needed for works, inside or out, that affect the special interest of a listed building, and carrying out such works without consent is a criminal offence. The council weighs harm to the heritage asset against any public benefit of the proposal.
More on heritage and listed buildings applications in our guide
Nearby applications
Within 500 metres
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26/00555/NMA Granted
23 Grafton Street London W1S 4EY
Amendments to planning permission dated 17 June 2025 (RN: 25/01604/FULL) for Phased development including replacement of rear basement roof slab and creation of a rear extension at ground floor. Removal of rear ground floor toilet block and external fire escape stairs. Demolition of existing, altered mansard roof and construction of a new mansard roof with dormer windows and concealed plant enclosure. Extension of existing lift to serve fourth floor. Replacement of third floor rear windows with double glazed sash windows. Minor internal reconfigurations. Continued use of ground floor as retail (Use Class E(a)) and basement, first, second, third and fourth as office (Use Class E(g)). NAMELY, to retain ground floor rear door, retain existing floor slab and rear void, retain ground-floor landing stairs in existing arrangement, and amendment of Condition 11 to require details of waste and recycling to be submitted for approval prior to occupation.
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26/01670/ADFULL Awaiting decision
23 Grafton Street London W1S 4EY
Detailed drawings of the alterations to party walls and buttress pursuant to part conditions 10a of planning permission dated 17th June 2025 (RN 25/01604/FULL)
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26/01669/ADLBC Awaiting decision
23 Grafton Street London W1S 4EY
Detailed drawings of All new windows and doors pursuant to part conditions 4b of listed building consent dated 17th June 2025 (RN 25/01605/LBC)
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25/09056/ADFULL Awaiting decision
23 Grafton Street London W1S 4EY
Details of waste storage pursuant to condition 11 of planning permission dated 17 June 2025 (RN: 25/01604/FULL)
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26/00782/FULL Awaiting decision
23 Grafton Street London W1S 4EY
Variation of Conditions 7 and 8 of planning permission dated 17 June 2025 (RN: 25/01604/FULL) for 'Phased development including replacement of rear basement roof slab and creation of a rear extension at ground floor. Removal of rear ground floor toilet block and external fire escape stairs. Demolition of existing, altered mansard roof and construction of a new mansard roof with dormer windows and concealed plant enclosure. Extension of existing lift to serve fourth floor. Replacement of third floor rear windows with double glazed sash windows. Minor internal reconfigurations. Continued use of ground floor as retail (Use Class E(a)) and basement, first, second, third and fourth as office (Use Class E(g))'. NAMELY, to enable the use the lower ground to fourth floor levels for either Class E(a) retail and/or Class E(g) office use.
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26/01033/ADFULL Granted
23 Grafton Street London W1S 4EY
Detailed drawings, including sections (scale 1:20 and 1:5) of new rooflight pursuant to Condition 10 (B) (part) of planning permission dated 17th June 2025 (RN: 25/01604/FULL)
Other heritage and listed buildings applications
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Erection of a morning room side extension. (Linked to 26/04996/FULL)
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26/04979/LBC Awaiting decision
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Internal alterations including removal of internal enclosures; Replacement flooring, shelving and slatwall systems, staircase handrail repair and other associated joinery works.
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26/04987/LBC Awaiting decision
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Repainting of the existing timber shopfront, hand-painted fascia lettering, installation of a new hanging sign using the existing projecting sign bracket, and installation of a discreet fascia-mounted LED trough light.
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26/04995/LBC Awaiting decision
Hanover Lodge Outer Circle Regent's Park London NW1 4HB
Erection of rear conservatory extensions and an entrance loggia to side with roof terrace above, together with associated landscaping and alterations. (Linked with 26/04994/FULL)