Side Extension approval rate in Cambridge
Cambridge approved 91.7% of side extension applications, based on 556 decisions analysed.
Last updated: March 2026
91.7%
side extension approval rate
556
Side Extension decisions
510
Approved
46
Refused
90.4%
Cambridge overall
Side Extension applications are approved at roughly the same rate as the Cambridge average (90.4%).
How side extension compares in Cambridge
Side Extension
91.7%
Cambridge all applications
90.4%
Planning a side extension in Cambridge?
91.7% 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 Cambridge Pro Report — £79
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Less than one set of revised drawings.
Other project types in Cambridge
93.1%
89.4%
93.3%
89.3%
93.1%
87.6%
91.6%
78.7%
93.0%
96.3%
86.9%
95.8%
60.0%
100.0%