Side Extension approval rate in Spelthorne
Spelthorne approved 85.1% of side extension applications, based on 228 decisions analysed.
Last updated: August 2026
85.1%
side extension approval rate
228
Side Extension decisions
194
Approved
34
Refused
86.3%
Spelthorne overall
Side Extension applications are approved at roughly the same rate as the Spelthorne average (86.3%).
How side extension compares in Spelthorne
Side Extension
85.1%
Spelthorne all applications
86.3%
Planning a side extension in Spelthorne?
85.1% 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 Spelthorne →
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Other project types in Spelthorne
86.0%
80.2%
75.3%
74.1%
89.2%
90.0%
74.2%
87.1%
87.5%
78.8%
76.5%
42.6%
31.2%
75.0%