Annex approval rate in Cardiff
Cardiff approved 78.6% of annex applications, based on 28 decisions analysed.
Last updated: June 2026
78.6%
annex approval rate
28
Annex decisions
22
Approved
6
Refused
81.7%
Cardiff overall
Annex applications are refused more often than the Cardiff average (81.7%), suggesting the council scrutinises these projects more closely.
How annex compares in Cardiff
Annex
78.6%
Cardiff all applications
81.7%
Planning a annex in Cardiff?
78.6% 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
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✓ Nearest comparable annex decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Other project types in Cardiff
67.9%
66.9%
66.6%
85.6%
70.2%
49.4%
65.6%
77.8%
84.1%
82.8%
88.5%
83.3%
71.4%
77.8%