Annex approval rate in Cornwall
Cornwall approved 95.3% of annex applications, based on 822 decisions analysed.
Last updated: September 2026
95.3%
annex approval rate
822
Annex decisions
783
Approved
39
Refused
92.4%
Cornwall overall
Annex applications are approved more often than the Cornwall average (92.4%), suggesting the council is relatively receptive to these projects.
How annex compares in Cornwall
Annex
95.3%
Cornwall all applications
92.4%
Planning a annex in Cornwall?
95.3% 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 Cornwall →
✓ 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 Cornwall and any other published UK council — see the data services →
Other project types in Cornwall
95.9%
94.0%
94.5%
97.1%
83.0%
96.4%
98.0%
97.3%
93.2%
93.7%
97.5%
98.6%
93.8%
93.5%
82.4%