Rear Extension approval rate in Cornwall

Cornwall approved 97.8% of rear extension applications, based on 323 decisions analysed.

Last updated: March 2026

97.8%

rear extension approval rate

323

Rear Extension decisions

316

Approved

Refused

93.9%

Cornwall overall

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

How rear extension compares in Cornwall

Rear Extension (323 decided)

97.8%

Cornwall all applications (6,212 decided)

93.9%

Planning a rear extension in Cornwall?

97.8% 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
✓ Nearest comparable rear 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.