Planning application
23 Grafton Street London W1S 4EY
Works: Extension Loft or dormer Demolition Windows or glazing
Decided. The decision notice on the council portal carries the outcome in full, including any conditions.
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
Application record
- Reference
- 26/00554/LBC
- Category
- Heritage and listed buildings
- Status
- Decided
- Received
- 30 Jan 2026
- Validated
- 30 Jan 2026
- Decided
- 13 Oct 2026
- Ward
- West End
- Postcode
- W1S 4EY
Site history
Applications at this address on the Westminster register
This site has had 10 applications since 2025: 3 approved, 0 refused.
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26/07376/ADFULL Awaiting decision
23 Grafton Street London W1S 4EY
Sample of the York stone to be used for the new front steps to ground floor level; pursuant to condition 7 of planning permission dated 13th October 2026 (26/00554/LBC)
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26/06193/ADFULL Decided
23 Grafton Street London W1S 4EY
Details of all new windows and doors; pursuant to condition 10(B) of planning permission dated 17th June 2026 (25/01604/FULL)
-
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)
-
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)
-
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)
-
26/01025/ADLBC Granted
23 Grafton Street London W1S 4EY
Detailed drawings, including sections of rooflight to mansard roof pursuant to Condition 4 (B) (part) of listed building dated 17th June 2025 (RN: 25/01605/LBC)
-
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.
-
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.
-
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)
Timeline
Dates from the published record
-
30 Jan 2026
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
13 Oct 2026
Decision issued
-
13 Oct 2026
Status changed to Decided
Previously Pending.
Related applications
Cases linked to this one on the register
1 later application on the register refers to this one:
-
26/07376/ADFULL Awaiting decision
23 Grafton Street London W1S 4EY
Sample of the York stone to be used for the new front steps to ground floor level; pursuant to condition 7 of planning permission dated 13th October 2026 (26/00554/LBC)
Documents
Plans, drawings, consultee responses and the officer's report
47 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
Watch members (£5 a month) open the document list from here.
Open the documentsAfter the decision
Westminster has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. More in our guide to what happens after a planning decision.
About heritage and listed building applications
Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
23 Grafton Street London W1S 4EY
88% historically approved · decision due ~8 May
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)
Awaiting decision Full applications 12 docs -
23 Grafton Street London W1S 4EY
89% historically approved · decision due ~8 May
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)
Awaiting decision Conditions Windows or glazing 13 docs -
23 Grafton Street London W1S 4EY
88% historically approved · decision due ~9 Feb
Details of waste storage pursuant to condition 11 of planning permission dated 17 June 2025 (RN: 25/01604/FULL)
Awaiting decision Full applications 5 docs -
23 Grafton Street London W1S 4EY
88% historically approved · decision due ~7 Apr
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.
Awaiting decision Full applications Extension Loft or dormer +2 13 docs -
23 Grafton Street London W1S 4EY
89% historically approved · decision due ~23 Dec
Sample of the York stone to be used for the new front steps to ground floor level; pursuant to condition 7 of planning permission dated 13th October 2026 (26/00554/LBC)
Awaiting decision -
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)
Granted Full applications Loft or dormer 10 docs
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