Planning Application
25/08126/FULL
1 Devonshire Close London W1G 7BA
Full / Other PlanningMarylebone ward
Submission
7 Nov 2025
Target
2 Jan 2026
Decision
9 Mar 2026
Outcome
Approved
Delegated decisionApproved
9 Mar 2026Decided by Matthew Giles under delegated powers
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Scheme description
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.
Parties
Timeline
7 Nov 2025
Application submitted
9 Mar 2026
Delegated decision: Approved
Supporting documents · 41
1–25 of 41
GRANT OF FULL PP [PE]9 Mar 2026View ↗
DELEGATED REPORT9 Mar 2026View ↗
PROPOSED SIDE ELEVATION DRAWING23 Feb 2026View ↗
ACK-GENERAL LETTER (G/P/C)18 Nov 2025View ↗
CNSLT-LA SOCIETY18 Nov 2025View ↗
ECNSLT-INTERNAL CONSULTS18 Nov 2025View ↗
ECNSLT-INTERNAL CONSULTS18 Nov 2025View ↗
SITE NOTICE 21 OR 28 DAYS IF T&C APPL.18 Nov 2025View ↗
NEIGHBOUR NOTIFICATION LETTER (21D)18 Nov 2025View ↗
RECEIPT OF APPLICATION12 Nov 2025View ↗
APPLICATION SUMMARY SHEET12 Nov 2025View ↗
APPLICATION FORM REDACTED7 Nov 2025View ↗
ATTACHMENT SUMMARY7 Nov 2025View ↗
SITE LOCATION PLAN7 Nov 2025View ↗
SURVEY DRAWINGS GROUND FLOOR PLAN7 Nov 2025View ↗
SURVEY DRAWINGS FIRST FLOOR PLAN7 Nov 2025View ↗
SURVEY DRAWINGS ROOF LEVEL PLAN7 Nov 2025View ↗
SURVEY DRAWINGS SECTION A7 Nov 2025View ↗
SURVEY DRAWINGS SECTION B7 Nov 2025View ↗
SURVEY DRAWINGS SECTION C7 Nov 2025View ↗
SURVEY DRAWINGS ELEVATION 17 Nov 2025View ↗
SURVEY DRAWINGS ELEVATION 27 Nov 2025View ↗
SURVEY DRAWINGS ELEVATION 37 Nov 2025View ↗
SURVEY DRAWINGS ELEVATION 3A7 Nov 2025View ↗
TYPICAL SASH WINDOW DETAILS7 Nov 2025View ↗
View Application Page ↗
Data from the Westminster planning register.
Summary
Reference
25/08126/FULL
Ward
Type
Full Planning Permission Application
Applicant
Mr John Cornet
Submitted
7 Nov 2025
Decision date
9 Mar 2026
Officer
Council
Decision
Approved
Decision route
Delegated (officer)
How long, really
17
wks · this application
Submission → decision · 9 wks over the 8-week target
Public response
Objections
0
In support
0
Total comments
0