Side Extension approval rate in Spelthorne

Spelthorne approved 95.4% of side extension applications, based on 65 decisions analysed.

Last updated: March 2026

95.4%

side extension approval rate

Side Extension decisions

Approved

Refused

90.5%

Spelthorne overall

Side Extension applications are approved more often than the Spelthorne average (90.5%), suggesting the council is relatively receptive to these projects.

How side extension compares in Spelthorne

Side Extension (65 decided)

95.4%

Spelthorne all applications (717 decided)

90.5%

Planning a side extension in Spelthorne?

95.4% get approved — but the odds vary by street. Your Pro Report shows exactly what gets approved and refused near your property.

✓ Your ward's side extension approval rate
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect

Get Spelthorne Pro Report — £79

Less than one set of revised drawings.