Side Extension approval rate in Southampton
Southampton approved 84.4% of side extension applications, based on 64 decisions analysed.
Last updated: March 2026
84.4%
side extension approval rate
64
Side Extension decisions
54
Approved
10
Refused
90.7%
Southampton overall
Side Extension applications are refused more often than the Southampton average (90.7%), suggesting the council scrutinises these projects more closely.
How side extension compares in Southampton
Side Extension
84.4%
Southampton all applications
90.7%
Planning a side extension in Southampton?
84.4% 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 Southampton Pro Report — £79
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Less than one set of revised drawings.
Other project types in Southampton
91.9%
89.8%
100.0%
81.2%
85.7%
85.0%
94.1%
90.9%
90.0%