Planning application
25/05261/FULL
1 Devonshire Close London W1G 7BA
Proposal
Erection of a single storey mansard roof extension and extensions at rear ground and first floor levels. Alterations to the front and rear elevations all in connection with the continued use of the property as a single family dwelling.
As published by the council, reference 25/05261/FULL
Timeline
Dates from the published record
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28 Jul 2025
Received by Westminster
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21 Aug 2025
Validated
Checked as complete and ready for consideration.
-
14 Oct 2025
Decision issued: Application Permitted
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21 Jul 2026
Added to PlanIndex
What 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 full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
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25/08126/FULL Awaiting decision
1 Devonshire Close London W1G 7BA
Erection of a mansard roof extension at second floor level and alterations to the front and rear elevations all in connection with the continued use of the property as a single family dwelling (Class C3).
-
25/05262/FULL Refused
1 Devonshire Close London W1G 7BA
Erection of a mansard roof extension at second floor level and alterations to the front and rear elevations all in connection with the continued use of the property as a single family dwelling.
-
25/09033/LBC Granted
110 Harley Street London W1G 7JG
Installation of a PVC duct within the basement lightwell to facilitate an external fibre cable routing and a fibre termination box, installation of internal fibre cabling from the termination point to a communications rack located within the basement communications room.
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25/06888/TELNOT Decided
110 Harley Street London W1G 7JG
Regulation 5 Notice of Intention to Install Fixed Line Broadband Apparatus to a Listed Building.
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25/08776/ADFULL Granted
4 Devonshire Close London W1G 7BA
Details of site investigation (phase 1 - 3) pursuant to condition 9 (part) of planning permission dated 19 November 2025 (RN: 25/04318/FULL)
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25/08775/ADFULL Granted
4 Devonshire Close London W1G 7BA
Details of Whole Life Carbon Assessment pursuant to condition 7 (part 1) of planning permission dated 19 November 2025 (RN: 25/04318/FULL)
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26/04824/ADFULL Granted
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26/04829/ADFULL Granted
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26/04841/ADFULL Granted
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Details of the facing materials you will use, including glazing, and elevations and roof plans annotated to show where the materials are to be located pursuant to condition 5 of planning permission dated 18th November 2025 (RN:25/06159).
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26/04989/FULL Awaiting decision
1 Kildare Terrace London W2 5JT
Erection of a mansard roof extending over the main house and side wing, replacement lower ground rear extension with roof terrace above, lowering of lower ground floor slab, installation of an air source heat pump in rear garden, new front boundary treatment, and new second floor window on the north elevation.
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26/04986/FULL Awaiting decision
Inver Court Inverness Terrace London W2 6JB
Replacement of combustible materials in the render facades; timber decking and plastic soffits/ fascias to terraces with non-combustible materials on the 5th and 6th floors.