Annex approval rate in Westminster
Westminster approved 93.7% of annex applications, based on 111 decisions analysed.
Last updated: September 2026
93.7%
annex approval rate
111
Annex decisions
104
Approved
7
Refused
90.5%
Westminster overall
Annex applications are approved more often than the Westminster average (90.5%), suggesting the council is relatively receptive to these projects.
How annex compares in Westminster
Annex
93.7%
Westminster all applications
90.5%
Planning a annex in Westminster?
93.7% get approved, but the odds vary by street. Your Full Planning Analysis 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
Free planning check for Westminster →
✓ Nearest comparable annex decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Planning professional? PlanningLens runs refusal alerts and evidence packs for Westminster and any other published UK council — see the data services →
Other project types in Westminster
92.8%
91.0%
87.6%
88.4%
93.5%
92.6%
86.0%
88.3%
90.0%
96.4%
87.9%
73.6%
87.3%
80.0%