Side Extension approval rate in Cornwall

Cornwall approved 98.9% of side extension applications, based on 187 decisions analysed.

Last updated: March 2026

98.9%

side extension approval rate

187

Side Extension decisions

185

Approved

Refused

93.9%

Cornwall overall

Side Extension applications are approved more often than the Cornwall average (93.9%), suggesting the council is relatively receptive to these projects.

How side extension compares in Cornwall

Side Extension (187 decided)

98.9%

Cornwall all applications (6,212 decided)

93.9%

Planning a side extension in Cornwall?

98.9% 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

Get Cornwall Pro Report — £79

Less than one set of revised drawings.