Side Extension approval rate in Sutton
Sutton approved 79.3% of side extension applications, based on 3,086 decisions analysed.
Last updated: September 2026
79.3%
side extension approval rate
3,086
Side Extension decisions
2,446
Approved
640
Refused
83.3%
Sutton overall
Side Extension applications are refused more often than the Sutton average (83.3%), suggesting the council scrutinises these projects more closely.
How side extension compares in Sutton
Side Extension
79.3%
Sutton all applications
83.3%
Planning a side extension in Sutton?
79.3% 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 Sutton →
✓ 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 Sutton and any other published UK council — see the data services →
Other project types in Sutton
80.1%
82.8%
83.0%
88.9%
79.6%
78.2%
77.9%
91.4%
82.0%
82.0%
84.5%
84.6%
72.7%
72.4%
79.1%