Rear Extension approval rate in Spelthorne
Spelthorne approved 85.9% of rear extension applications, based on 661 decisions analysed.
Last updated: September 2026
85.9%
rear extension approval rate
661
Rear Extension decisions
568
Approved
93
Refused
82.5%
Spelthorne overall
Rear Extension applications are approved more often than the Spelthorne average (82.5%), suggesting the council is relatively receptive to these projects.
How rear extension compares in Spelthorne
Rear Extension
85.9%
Spelthorne all applications
82.5%
Planning a rear extension in Spelthorne?
85.9% 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 rear extension approval rate
✓ Nearest comparable rear extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Free planning check for Spelthorne →
✓ Nearest comparable rear extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Planning professional? PlanningLens runs refusal alerts and evidence packs for Spelthorne and any other published UK council — see the data services →
Other project types in Spelthorne
79.8%
83.7%
75.7%
73.8%
88.7%
90.4%
74.5%
86.7%
87.8%
80.0%
77.8%
42.6%
31.2%
75.0%