Side Extension approval rate in Merton
Merton approved 84.9% of side extension applications, based on 1,898 decisions analysed.
Last updated: March 2026
84.9%
side extension approval rate
1,898
Side Extension decisions
1,612
Approved
286
Refused
85.9%
Merton overall
Side Extension applications are approved at roughly the same rate as the Merton average (85.9%).
How side extension compares in Merton
Side Extension
84.9%
Merton all applications
85.9%
Planning a side extension in Merton?
84.9% 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 Merton 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 Merton
81.5%
89.9%
88.3%
88.7%
87.7%
86.8%
82.8%
86.6%
82.8%
91.3%
88.5%
93.1%
78.2%
55.7%
79.2%