Planning application
17 Chapel Street London SW1X 7BY
Works: Extension
Relates to 26/04162/NMA
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Erection of an additional storey at main roof level and a rear extension at lower ground floor level with terrace over and associated internal alterations (Linked with 26/04162/NMA)
As published by the council, reference 26/04885/LBC
Application record
- Reference
- 26/04885/LBC
- Category
- Heritage and listed buildings
- Status
- Pending
- Received
- 21 Jul 2026
- Validated
- 21 Jul 2026
- Postcode
- SW1X 7BY
Site history
Applications at this address on the Westminster register
This site has had 9 applications since 2025: 0 approved, 1 refused.
-
26/04162/NMA Awaiting decision
17 Chapel Street London SW1X 7BY
Amendments to planning permission dated 24 July 2025 (25/01676/FULL) for: Erection of an additional storey at main roof level and a rear extension at lower ground floor level with terrace over namely; to allow alterations to floor plans; reduction in number of roof lights in rear extension, from two to one; maintenance access hatch in main roof (Linked with 26/04885/LBC)
-
26/03892/LBC Awaiting decision
17 Chapel Street London SW1X 7BY
Erection of timber glazed orangery extension to existing first floor rear terrace and associated internal alterations. (Linked with 26/03891/FULL)
-
26/03891/FULL Awaiting decision
17 Chapel Street London SW1X 7BY
Erection of timber glazed orangery extension to existing first floor rear terrace. (Linked with 26/03892/LBC)
-
26/03816/ADFULL Decided
17 Chapel Street London SW1X 7BY
Details of Arboricultural method statement pursuant to condition 6 of planning permission dated 24 July 2025 (RN: 25/01676/FULL).
-
26/01389/ADFULL Awaiting decision
17 Chapel Street London SW1X 7BY
Details of windows and doors pursuant to Condition 4 of planning permission dated 24 July 2025 (RN: 25/01676/FULL). [Linked to 26/01476/ADLBC]
-
26/01476/ADLBC Awaiting decision
17 Chapel Street London SW1X 7BY
Details of new staircase to fourth floor pursuant to Condition 3 of listed building consent dated 24 July 2025 (RN: 25/01677/LBC). [Linked to 26/01389/ADFULL]
-
26/01057/ADFULL Awaiting decision
17 Chapel Street London SW1X 7BY
Details of tree method statement pursuant to Condition 6 of planning permission dated 24/07/2025 (RN: 25/01676/FULL)
-
25/07612/ADFULL Refused
17 Chapel Street London SW1X 7BY
Detailed drawings of a) All new external windows and doors and b) The timber screen/trellis to the roof terrace on the rear extension and a tree protection method statement pursuant to Conditions 4 and 6 of planning permission dated 24 July 2025 (RN: 25/01676/FULL).
Timeline
Dates from the published record
-
21 Jul 2026
Received by Westminster
-
29 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 15 September 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Westminster took a median of 91 days over the applications it decided in the last year.
Related applications
Cases linked to this one on the register
-
26/04162/NMA Awaiting decision
17 Chapel Street London SW1X 7BY
Amendments to planning permission dated 24 July 2025 (25/01676/FULL) for: Erection of an additional storey at main roof level and a rear extension at lower ground floor level with terrace over namely; to allow alterations to floor plans; reduction in number of roof lights in rear extension, from two to one; maintenance access hatch in main roof (Linked with 26/04885/LBC)
1 later application on the register refers to this one:
-
26/04162/NMA Awaiting decision
17 Chapel Street London SW1X 7BY
Amendments to planning permission dated 24 July 2025 (25/01676/FULL) for: Erection of an additional storey at main roof level and a rear extension at lower ground floor level with terrace over namely; to allow alterations to floor plans; reduction in number of roof lights in rear extension, from two to one; maintenance access hatch in main roof (Linked with 26/04885/LBC)
What happens while it is decided
This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided heritage and listed building applications in a median of 119 days. More in our guide to how long planning decisions take.
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
-
17 Chapel Street London SW1X 7BY
89% historically approved · decision due ~5 Aug
Details of Arboricultural method statement pursuant to condition 6 of planning permission dated 24 July 2025 (RN: 25/01676/FULL).
Decided -
10 Chapel Street London SW1X 7BY
Details of a completed Appendix A checklist from the Code of Construction Practice pursuant to Condition 3 of planning permission dated 10 July 2025 (RN: 25/01535/FULL).
Granted -
10 Chapel Street London SW1X 7BY
Detailed drawings of window at rear third floor level above the closet wing extension to match the windows in the rear closet wing extension in terms of size and detailed design and the two roof skylights must be conservation area styled rooflights, reduced in size, centrally positioned and closer to the roof ridge; detailed drawings of the new windows within the closet wing extension pursuant to Conditions 6 (parts a and b) and 7 of planning permission dated 10 July 2025 (RN:25/01535/FULL).
Decided Extension Loft or dormer +1 -
17 Chapel Street London SW1X 7BY
88% historically approved · decision due ~29 Apr
Details of windows and doors pursuant to Condition 4 of planning permission dated 24 July 2025 (RN: 25/01676/FULL). [Linked to 26/01476/ADLBC]
Awaiting decision Full applications Windows or glazing 10 docs -
17 Chapel Street London SW1X 7BY
89% historically approved · decision due ~29 Apr
Details of new staircase to fourth floor pursuant to Condition 3 of listed building consent dated 24 July 2025 (RN: 25/01677/LBC). [Linked to 26/01389/ADFULL]
Awaiting decision Conditions 10 docs -
22 Chapel Street London SW1X 7BY
90% historically approved · decision due ~3 Jun
Proposed defect remedial and waterproofing works to:- railings & stone kerb upstand, entrance portico; balcony balustrade and stucco work to elevation and columns at:- lower ground; ground and first storey levels. (Linked to 26/02318/FULL)
Awaiting decision Heritage and listed buildings 16 docs
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