Rear Extension approval rate in Caerphilly
Caerphilly approved 85.6% of rear extension applications, based on 439 decisions analysed.
Last updated: March 2026
85.6%
rear extension approval rate
439
Rear Extension decisions
376
Approved
63
Refused
83.2%
Caerphilly overall
Rear Extension applications are approved more often than the Caerphilly average (83.2%), suggesting the council is relatively receptive to these projects.
How rear extension compares in Caerphilly
Rear Extension
85.6%
Caerphilly all applications
83.2%
Planning a rear extension in Caerphilly?
85.6% get approved — but the odds vary by street. Your Pro Report shows exactly what gets approved and refused near your property.
✓ Your ward's rear extension approval rate
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✓ Nearest comparable rear 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
82.9%
77.8%
80.9%
78.6%
85.1%
90.3%
83.7%
73.7%
57.6%
76.9%
87.0%
83.3%
83.3%