Side Extension approval rate in Caerphilly
Caerphilly approved 75.7% of side extension applications, based on 597 decisions analysed.
Last updated: August 2026
75.7%
side extension approval rate
597
Side Extension decisions
452
Approved
145
Refused
78.2%
Caerphilly overall
Side Extension applications are refused more often than the Caerphilly average (78.2%), suggesting the council scrutinises these projects more closely.
How side extension compares in Caerphilly
Side Extension
75.7%
Caerphilly all applications
78.2%
Planning a side extension in Caerphilly?
75.7% 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 side extension approval rate
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Free planning check for Caerphilly →
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Other project types in Caerphilly
76.8%
80.8%
77.5%
75.1%
71.2%
86.3%
72.4%
73.9%
52.4%
70.8%
74.1%
92.5%
71.9%
63.0%
81.2%