Side Extension approval rate in Lewisham
Lewisham approved 75.9% of side extension applications, based on 1,199 decisions analysed.
Last updated: September 2026
75.9%
side extension approval rate
1,199
Side Extension decisions
910
Approved
289
Refused
82.4%
Lewisham overall
Side Extension applications are refused more often than the Lewisham average (82.4%), suggesting the council scrutinises these projects more closely.
How side extension compares in Lewisham
Side Extension
75.9%
Lewisham all applications
82.4%
Planning a side extension in Lewisham?
75.9% 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 Lewisham →
✓ 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 Lewisham and any other published UK council — see the data services →
Other project types in Lewisham
75.7%
83.0%
83.7%
84.1%
79.3%
81.6%
82.5%
82.4%
83.1%
61.3%
85.1%
83.6%
88.8%
69.9%
61.5%