Side Extension approval rate in Southwark
Southwark approved 94.4% of side extension applications, based on 1,869 decisions analysed.
Last updated: September 2026
94.4%
side extension approval rate
1,869
Side Extension decisions
1,765
Approved
104
Refused
93.0%
Southwark overall
Side Extension applications are approved at roughly the same rate as the Southwark average (93.0%).
How side extension compares in Southwark
Side Extension
94.4%
Southwark all applications
93.0%
Planning a side extension in Southwark?
94.4% 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 Southwark →
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Planning professional? PlanningLens runs refusal alerts and evidence packs for Southwark and any other published UK council — see the data services →
Other project types in Southwark
96.1%
92.3%
94.4%
94.1%
93.2%
88.8%
95.4%
92.6%
91.0%
94.3%
92.7%
94.0%
85.1%
95.1%
93.2%