Annex approval rate in Westminster
Westminster approved 94.3% of annex applications, based on 105 decisions analysed.
Last updated: March 2026
94.3%
annex approval rate
105
Annex decisions
99
Approved
6
Refused
90.8%
Westminster overall
Annex applications are approved more often than the Westminster average (90.8%), suggesting the council is relatively receptive to these projects.
How annex compares in Westminster
Annex
94.3%
Westminster all applications
90.8%
Planning a annex in Westminster?
94.3% get approved — but the odds vary by street. Your Pro Report shows exactly what gets approved and refused near your property.
✓ Your ward's annex approval rate
✓ Nearest comparable annex decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
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✓ Nearest comparable annex decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Less than one set of revised drawings.
Other project types in Westminster
92.8%
91.0%
87.7%
88.6%
93.6%
92.8%
86.1%
96.6%
88.4%
90.4%
88.6%
77.3%
89.8%
82.1%