Side Extension approval rate in Birmingham

Birmingham approved 87.1% of side extension applications, based on 5,640 decisions analysed.

Last updated: March 2026

87.1%

side extension approval rate

5,640

Side Extension decisions

4,911

Approved

729

Refused

83.8%

Birmingham overall

Side Extension applications are approved more often than the Birmingham average (83.8%), suggesting the council is relatively receptive to these projects.

How side extension compares in Birmingham

Side Extension (5,640 decided)

87.1%

Birmingham all applications (33,111 decided)

83.8%

Planning a side extension in Birmingham?

87.1% 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 Birmingham Pro Report — £79

Less than one set of revised drawings.