Side Extension approval rate in Caerphilly

Caerphilly approved 75.5% of side extension applications, based on 584 decisions analysed.

Last updated: June 2026

75.5%

side extension approval rate

584

Side Extension decisions

441

Approved

143

Refused

78.4%

Caerphilly overall

Side Extension applications are refused more often than the Caerphilly average (78.4%), suggesting the council scrutinises these projects more closely.

How side extension compares in Caerphilly

Side Extension (584 decided)

75.5%

Caerphilly all applications (4,904 decided)

78.4%

Planning a side extension in Caerphilly?

75.5% 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 →