25/08126/FULLPlanning Application 25/08126/FULL
Full application at 1 Devonshire Close London W1G 7BA, Westminster. View planning documents, track the decision and get email alerts on updates.
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).
25/08126/FULL
1 Devonshire Close London W1G 7BA
This is a full planning application for an extension at 1 Devonshire Close London W1G 7BA. Westminster has handled 4,496 applications of this type and approves 84% of them, typically deciding them in 73 days. It was submitted on 7 November 2025 and is still awaiting a decision. The site is in the Harley Street conservation area, with 20 listed buildings nearby. There are no previous applications recorded at this address. In the past year there have been 221 applications across Marylebone. We hold 303 applications in total for the W1G postcode area.
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Application Details
Applicant & Agent
Planning Application Dates
Planning Decision
Publicity
Appeal
Additional Information
Source: Westminster