Side Extension approval rate in Portsmouth
Portsmouth approved 87.0% of side extension applications, based on 571 decisions analysed.
Last updated: September 2026
87.0%
side extension approval rate
571
Side Extension decisions
497
Approved
74
Refused
86.5%
Portsmouth overall
Side Extension applications are approved at roughly the same rate as the Portsmouth average (86.5%).
How side extension compares in Portsmouth
Side Extension
87.0%
Portsmouth all applications
86.5%
Planning a side extension in Portsmouth?
87.0% 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 Portsmouth →
✓ 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 Portsmouth and any other published UK council — see the data services →
Other project types in Portsmouth
89.2%
85.5%
78.7%
84.6%
85.9%
92.2%
93.2%
75.0%
68.7%
85.3%
79.2%
87.4%
91.3%
75.0%
70.4%