Side Extension approval rate in Kensington & Chelsea
Kensington & Chelsea approved 89.7% of side extension applications, based on 668 decisions analysed.
Last updated: March 2026
89.7%
side extension approval rate
668
Side Extension decisions
599
Approved
69
Refused
92.5%
Kensington & Chelsea overall
Side Extension applications are refused more often than the Kensington & Chelsea average (92.5%), suggesting the council scrutinises these projects more closely.
How side extension compares in Kensington & Chelsea
Side Extension
89.7%
Kensington & Chelsea all applications
92.5%
Planning a side extension in Kensington & Chelsea?
89.7% 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 Kensington & Chelsea 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 Kensington & Chelsea
92.3%
89.7%
92.2%
92.8%
86.4%
89.2%
89.0%
90.8%
92.4%
92.6%
90.9%
94.7%
86.0%
88.4%