Planning application
17 Chapel Street London SW1X 7BY
Works: Extension Loft or dormer
Relates to 26/04885/LBC
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
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)
As published by the council, reference 26/04162/NMA
Application record
- Reference
- 26/04162/NMA
- Type
- Non-material amendments
- Status
- Pending
- Received
- 23 Jun 2026
- Validated
- 21 Jul 2026
- Ward
- Knightsbridge & Belgravia
- 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.
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26/04885/LBC Awaiting decision
17 Chapel Street London SW1X 7BY
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)
-
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]
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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]
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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)
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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
-
23 Jun 2026
Received by Westminster
-
21 Jul 2026
Validated
Checked as complete and ready for consideration.
-
3 Aug 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
-
26/04885/LBC Awaiting decision
17 Chapel Street London SW1X 7BY
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)
1 later application on the register refers to this one:
-
26/04885/LBC Awaiting decision
17 Chapel Street London SW1X 7BY
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)
Who's behind it
Company information only, from the register and Companies House
DRY Architects Ltd Agent, an architecture practice registered in London
Active · incorporated 2013 · London
9 applications on PlanIndex · across 6 councils
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
10 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 documentsWhat 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 amendment applications in a median of 81 days. More in our guide to how long planning decisions take.
About amendment applications
An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
17 Chapel Street London SW1X 7BY
90% historically approved · decision due ~10 Aug
Erection of timber glazed orangery extension to existing first floor rear terrace and associated internal alterations. (Linked with 26/03891/FULL)
Awaiting decision Heritage and listed buildings Extension Windows or glazing 2 docs -
17 Chapel Street London SW1X 7BY
88% historically approved · decision due ~10 Aug
Erection of timber glazed orangery extension to existing first floor rear terrace. (Linked with 26/03892/LBC)
Awaiting decision Full applications Extension Windows or glazing 21 docs -
17 Chapel Street London SW1X 7BY
88% historically approved · decision due ~16 Apr
Details of tree method statement pursuant to Condition 6 of planning permission dated 24/07/2025 (RN: 25/01676/FULL)
Awaiting decision Full applications Trees 7 docs -
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 -
17 Chapel Street London SW1X 7BY
90% historically approved · decision due ~15 Sep
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)
Awaiting decision Heritage and listed buildings Extension -
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
Other amendment applications
In Westminster
-
26/07459/NMA Awaiting decision
1 Hanover Square London W1S 1HA
Amendments to planning pemrission dated 10 October 2025 (RN: 25/01558/FULL) for the: Partial demolition, refurbishment and extension of the existing building to provide a sub-basement, basement, ground plus eight storey building; infilling and stepped rear extension; excavation of a new sub-basement level; installation of new plant equipment at basement and roof level; terraces at fourth, fifth, sixth, seventh and eighth floor levels; soft and hard landscaping; reprovision of car parking; new cycle parking facilities; and associated external works. Use of the building for retail and/or restaurant (Class E) on part ground floor and office (Class E) on all other floors. NAMELY, to allow alterations to the design of the ground floor frontages on Hanover Square and St George Street.
-
26/07438/NMA Awaiting decision
29 - 31 Hill Street London W1J 5LS
Amendments to planning permission dated 1st July 2025 (RN 25/01006/FULL) for the external alterations at roof level including the creation of Level 04 roof terrace for use in association with existing office (Class E), replacement and installation of new plant and landscaping, replacement of windows, introduction of louvres, removal and replacement of rooflights, installation of new rooflight and other associated works. NAMELY, for alterations comprising of the removal of window sash boxes and weights, changes to the window mullion arrangement, the removal of two sash windows, the installation of secondary glazing, the removal of existing chamber hatch and installation of extract vent and integrated bench, the external replacement of rainwater goods and hoppers, the removal of bricks and installation of airbricks, minor demolition works, replacement of roof covering, removal of ductwork, roof plant rearrangement, the installation of a new external door to plant area, minor layout alterations and other associated works.
-
26/07389/NMA Decided
Flat 1 5 Grittleton Road London W9 2DD
Amendments to planning permission dated 04 June 2025 (RN: 25/02022/FULL), NAMELY, amendment of Condition 4 to correct the property address from 9 Aldridge Road Villas to Flat 1 5 Grittleton Road.
-
26/07377/NMA Awaiting decision
60 Ledbury Road London W11 2AJ
Amendments to planning permission dated 2nd October 2025 (RN 25/04018/FULL) for the Partial demolition, refurbishment, and erection of a mansard roof extension to form a new third floor with dormers to front, side and rear elevations; to form 6 flats (Class C3) on upper floors; external plant equipment and ductwork; lower ground floor excavation to increase floor to ceiling height; replacement windows; cycle parking and associated external alterations; use of the part ground floor and lower ground floor as retail and restaurant (Class E). Site includes 60-68 Ledbury Road) NAMELY, An amendment to the basement and ground floor drawing reference numbers; amendment to the description of development, in reference to restaurant and or retail use; and amendments to C
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26/07375/NMA Awaiting decision
77 Hereford Road London W2 5BB
Amendments to planning permission dated 4th August 2026 (RN 26/03970/FULL) for the Replacement of roof terrace access stair with glazed hatch, new timber decking and front and rear roof railings to roof terrace, with infilling side window of closet wing. NAMELY, Hinged hatch access substituted by sliding hatch.