Side Extension approval rate in Sefton
Sefton approved 96.3% of side extension applications, based on 218 decisions analysed.
Last updated: August 2026
96.3%
side extension approval rate
218
Side Extension decisions
210
Approved
8
Refused
88.0%
Sefton overall
Side Extension applications are approved more often than the Sefton average (88.0%), suggesting the council is relatively receptive to these projects.
How side extension compares in Sefton
Side Extension
96.3%
Sefton all applications
88.0%
Planning a side extension in Sefton?
96.3% 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
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Free planning check for Sefton →
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Other project types in Sefton
93.5%
91.2%
90.4%
92.8%
97.7%
85.2%
90.5%
72.6%
94.7%
33.3%
100.0%
100.0%
82.9%
95.1%
94.4%