Side Extension approval rate in Merton
Merton approved 85.0% of side extension applications, based on 1,959 decisions analysed.
Last updated: August 2026
85.0%
side extension approval rate
1,959
Side Extension decisions
1,666
Approved
293
Refused
86.2%
Merton overall
Side Extension applications are approved at roughly the same rate as the Merton average (86.2%).
How side extension compares in Merton
Side Extension
85.0%
Merton all applications
86.2%
Planning a side extension in Merton?
85.0% 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 Merton →
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Other project types in Merton
81.8%
89.9%
88.5%
88.7%
87.8%
86.9%
83.0%
87.2%
83.0%
91.4%
88.7%
92.6%
79.1%
55.6%
79.2%