Side Extension approval rate in Caerphilly
Caerphilly approved 77.8% of side extension applications, based on 257 decisions analysed.
Last updated: March 2026
77.8%
side extension approval rate
257
Side Extension decisions
200
Approved
57
Refused
83.2%
Caerphilly overall
Side Extension applications are refused more often than the Caerphilly average (83.2%), suggesting the council scrutinises these projects more closely.
How side extension compares in Caerphilly
Side Extension
77.8%
Caerphilly all applications
83.2%
Planning a side extension in Caerphilly?
77.8% get approved — but the odds vary by street. Your Pro Report shows exactly what gets approved and refused near your property.
✓ Your ward's side extension approval rate
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
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✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Less than one set of revised drawings.
Other project types in Caerphilly
85.6%
82.9%
80.9%
78.6%
85.1%
90.3%
83.7%
73.7%
57.6%
76.9%
87.0%
83.3%
83.3%