Basement approval rate in Portsmouth
Portsmouth approved 87.4% of basement applications, based on 87 decisions analysed.
Last updated: March 2026
87.4%
basement approval rate
87
Basement decisions
76
Approved
11
Refused
88.5%
Portsmouth overall
Basement applications are approved at roughly the same rate as the Portsmouth average (88.5%).
How basement compares in Portsmouth
Basement
87.4%
Portsmouth all applications
88.5%
Planning a basement in Portsmouth?
87.4% get approved — but the odds vary by street. Your Pro Report shows exactly what gets approved and refused near your property.
✓ Your ward's basement approval rate
✓ Nearest comparable basement decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Get Portsmouth Pro Report — £79
✓ Nearest comparable basement decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Less than one set of revised drawings.
Other project types in Portsmouth
89.2%
85.5%
78.7%
84.6%
87.0%
85.9%
92.2%
93.2%
75.0%
68.7%
85.3%
79.2%
91.3%
75.0%
70.4%