Side Extension approval rate in Spelthorne
Spelthorne approved 85.0% of side extension applications, based on 206 decisions analysed.
Last updated: June 2026
85.0%
side extension approval rate
206
Side Extension decisions
175
Approved
31
Refused
86.2%
Spelthorne overall
Side Extension applications are approved at roughly the same rate as the Spelthorne average (86.2%).
How side extension compares in Spelthorne
Side Extension
85.0%
Spelthorne all applications
86.2%
Planning a side extension in Spelthorne?
85.0% 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 Spelthorne →
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Other project types in Spelthorne
85.6%
79.6%
75.5%
73.3%
88.0%
89.6%
73.2%
87.5%
88.9%
78.4%
43.9%
74.4%
31.2%
72.7%