Side Extension approval rate in Sefton
Sefton approved 96.7% of side extension applications, based on 239 decisions analysed.
Last updated: September 2026
96.7%
side extension approval rate
239
Side Extension decisions
231
Approved
8
Refused
90.5%
Sefton overall
Side Extension applications are approved more often than the Sefton average (90.5%), suggesting the council is relatively receptive to these projects.
How side extension compares in Sefton
Side Extension
96.7%
Sefton all applications
90.5%
Planning a side extension in Sefton?
96.7% 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 Sefton →
✓ 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 Sefton and any other published UK council — see the data services →
Other project types in Sefton
94.0%
91.6%
94.0%
91.1%
97.8%
85.6%
91.3%
95.6%
75.0%
43.1%
98.5%
100.0%
83.7%
95.2%
94.7%