Extension (General) approval rate in Cardiff

Cardiff approved 66.8% of extension (general) applications, based on 271 decisions analysed.

Last updated: March 2026

66.8%

extension (general) approval rate

271

Extension (General) decisions

181

Approved

Refused

81.9%

Cardiff overall

Extension (General) applications are refused more often than the Cardiff average (81.9%), suggesting the council scrutinises these projects more closely.

How extension (general) compares in Cardiff

Extension (General) (271 decided)

66.8%

Cardiff all applications (4,367 decided)

81.9%

Planning a extension (general) in Cardiff?

66.8% get approved — but the odds vary by street. Your Pro Report shows exactly what gets approved and refused near your property.

✓ Your ward's extension (general) approval rate
✓ Nearest comparable extension (general) decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect

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Less than one set of revised drawings.