Side Extension approval rate in Lewisham
Lewisham approved 75.4% of side extension applications, based on 1,146 decisions analysed.
Last updated: March 2026
75.4%
side extension approval rate
1,146
Side Extension decisions
864
Approved
282
Refused
82.9%
Lewisham overall
Side Extension applications are refused more often than the Lewisham average (82.9%), suggesting the council scrutinises these projects more closely.
How side extension compares in Lewisham
Side Extension
75.4%
Lewisham all applications
82.9%
Planning a side extension in Lewisham?
75.4% 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
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✓ 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 Lewisham
75.4%
83.2%
84.0%
84.2%
79.3%
80.9%
82.7%
81.7%
82.3%
64.5%
84.0%
82.7%
89.0%
67.5%
60.0%