Side Extension approval rate in Lambeth
Lambeth approved 85.2% of side extension applications, based on 2,252 decisions analysed.
Last updated: August 2026
85.2%
side extension approval rate
2,252
Side Extension decisions
1,918
Approved
334
Refused
84.5%
Lambeth overall
Side Extension applications are approved at roughly the same rate as the Lambeth average (84.5%).
How side extension compares in Lambeth
Side Extension
85.2%
Lambeth all applications
84.5%
Planning a side extension in Lambeth?
85.2% 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 Lambeth →
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Other project types in Lambeth
82.2%
87.3%
78.0%
84.7%
81.3%
89.2%
85.2%
85.2%
84.3%
77.0%
83.1%
87.7%
65.6%
77.5%
77.8%