Side Extension approval rate in Lambeth
Lambeth approved 85.2% of side extension applications, based on 2,272 decisions analysed.
Last updated: September 2026
85.2%
side extension approval rate
2,272
Side Extension decisions
1,936
Approved
336
Refused
82.9%
Lambeth overall
Side Extension applications are approved more often than the Lambeth average (82.9%), suggesting the council is relatively receptive to these projects.
How side extension compares in Lambeth
Side Extension
85.2%
Lambeth all applications
82.9%
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
Planning professional? PlanningLens runs refusal alerts and evidence packs for Lambeth and any other published UK council — see the data services →
Other project types in Lambeth
82.2%
87.3%
78.0%
84.6%
81.2%
89.2%
85.0%
85.3%
84.2%
77.3%
83.2%
87.6%
63.6%
76.4%
78.1%