Rear Extension approval rate in Caerphilly

Caerphilly approved 80.8% of rear extension applications, based on 978 decisions analysed.

Last updated: August 2026

80.8%

rear extension approval rate

978

Rear Extension decisions

790

Approved

188

Refused

78.2%

Caerphilly overall

Rear Extension applications are approved more often than the Caerphilly average (78.2%), suggesting the council is relatively receptive to these projects.

How rear extension compares in Caerphilly

Rear Extension (978 decided)

80.8%

Caerphilly all applications (4,981 decided)

78.2%

Planning a rear extension in Caerphilly?

80.8% 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 rear extension approval rate
✓ Nearest comparable rear extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect

Free planning check for Caerphilly →