Planning application
47 Devonshire Mews South London W1G 6QP
Works: Loft or dormer
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Amendments to planning permission dated 12 August 2010 (RN:10/03423) for the creation of an internal room in the place of the originally proposed small roof terrace, set behind an area of dummy mansard roof, to the front of the property at second floor level.
As published by the council, reference 11/11532/NMA
Application record
- Reference
- 11/11532/NMA
- Type
- Non-material amendments
- Status
- Decided
- Decision
- Application Permitted
- Received
- 28 Nov 2011
- Validated
- 28 Nov 2011
- Decided
- 20 Dec 2011
- Ward
- Marylebone High Street
- Decision by
- Delegated Decision
- Postcode
- W1G 6QP
Timeline
Dates from the published record
-
28 Nov 2011
Received by Westminster
-
20 Dec 2011
Decision issued: Application Permitted
-
20 Aug 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Agent on file, an architecture practice registered in London
22 applications on PlanIndex · across 3 councils · 100% granted
Trade members see who it is, their full track record, and every application they have filed.
See who's behind itDocuments
Plans, drawings, consultee responses and the officer's report
4 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.
Trade members open them from here.
Open the documentsWhat a grant of permission means
The process from here
Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.
Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.
About amendments applications
How this application type works
An amendment application changes a permission that already exists. Non-material amendments cover small adjustments with no wider effect, while minor material amendments, usually made by varying a condition, allow modest design changes without a fresh application. Anything beyond that needs a new permission, so the scope here is deliberately narrow.
Nearby applications
Within 500 metres
-
47 Devonshire Mews South London W1G 6QP
Approval of details pursuant to Condition 3 of planning permission dated 12 August 2010 (RN:10/03423); namely the submission of samples of the facing materials including glazing.
Granted Full applications Windows or glazing 3 docs -
113 - 115 Harley Street London W1G 6AP
90% historically approved · decision due ~28 Oct
Installation of a platform lift to the basement area at 113-115 Harley Street to the Devonshire Street (north) side of the property. (Linked with 26/04266/FULL)
Awaiting decision Heritage and listed buildings -
113 - 115 Harley Street London W1G 6AP
87% historically approved · decision due ~28 Oct
Installation of a platform lift to the basement area at 113-115 Harley Street to the Devonshire Street (north) side of the property. (Linked with 26/04267/LBC)
Awaiting decision Full applications -
9 Upper Wimpole Street London W1G 6LJ
Use of lower ground floor level for medical purposes (Class D1), installation of air conditioning unit in rear lower ground floor courtyard and one under the front lightwell staircase.
Granted Full applications 15 docs -
9 Upper Wimpole Street London W1G 6LJ
Use of lower ground floor level for medical purposes (Class D1) in association with internal alterations and the installation of air conditioning unit in rear lower ground floor courtyard. (part of land use swap with 122 Harley Street, 134 Harley Street, 40 Harley Street and 52 Harley Street).
Granted Heritage and listed buildings 3 docs -
9 Upper Wimpole Street London W1G 6LJ
Internal alterations at lower ground floor
Withdrawn Heritage and listed buildings 3 docs
Other amendments applications
In Westminster
-
26/05886/NMA Awaiting decision
10 Spring Gardens London SW1A 2BN
Amendments to planning permission dated 10th July 2025 (RN 25/00695/FULL) for the Use of part-ground, first, sixth, seventh and eighth floor levels as an Embassy (sui generis). Associated external alterations to the ground floor facade on Carlton House Terrace, and part ground floor to Piazza (Spring Gardens) frontage. External alterations to the doors. Installation of roof plant and security screens to the eighth floor. NAMELY, Addition of external attached building signage on West Elevation and South Elevation; Addition of two flagpoles on West Elevation; Addition of a parcel pass through, rather than fixed panel, to door on North Elevation; and omission of smoke vent and replacement with new paving to match existing paving.
-
26/05881/NMA Awaiting decision
50A Warlock Road London W9 3LW
Amendments to planning permission dated 11 August 2026 (RN: 26/04158/FULL) for the: Erection of a single-storey rear extension at lower ground floor level; replacement of existing rear window with a door at ground floor level and creation of terrace with associated railings/screening; and associated external alterations. NAMELY, revise the height of the rear elevation kitchen French doors.
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26/05798/NMA Awaiting decision
3 Blenheim Road London NW8 0LU
Amendments to planning permission dated 18th January 2024 (RN:22/04886/FULL) for Excavation of single-storey basement extension with lightwells to front and rear gardens; Erection of single-storey extension to rear and three-storey extension to side; Formation of door to rear at lower ground floor level; Landscaping works; and associated external alterations. Namely, internal alterations and minor adjustment to rooflight position.
-
26/05670/NMA Awaiting decision
64 St James's Street London SW1A 1NF
Amendments to planning permission dated 2nd September 2021 (21/02158/FULL) for: Demolition of the existing mansard roof and removal of plant and escape stair; erection of new double mansard roof extension and rear extension for additional commercial floorspace (Use Class E); and installation of new escape stair, rear balconies, roof terrace and associated works namely, amendments to allow for the installation of a condenser unit within the rear lightwell.
-
26/05674/NMA Awaiting decision
52 Eaton Place London SW1X 8AL
Amendments to planning permission dated 25 September 2025 (25/05108/FULL) for: Alterations to rear extension at first floor level including creation of rear roof terrace at second floor level; replacement of first and second floor level front windows with double glazed timber sash windows; replacement of front door; reinstatement of period windows and doors namely, to allow replacement of second floor rear full height sash window with set of french doors.