Side Extension approval rate in Cambridge
Cambridge approved 96.3% of side extension applications, based on 1,248 decisions analysed.
Last updated: September 2026
96.3%
side extension approval rate
1,248
Side Extension decisions
1,202
Approved
46
Refused
92.4%
Cambridge overall
Side Extension applications are approved more often than the Cambridge average (92.4%), suggesting the council is relatively receptive to these projects.
How side extension compares in Cambridge
Side Extension
96.3%
Cambridge all applications
92.4%
Planning a side extension in Cambridge?
96.3% 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 Cambridge →
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Planning professional? PlanningLens runs refusal alerts and evidence packs for Cambridge and any other published UK council — see the data services →
Other project types in Cambridge
96.5%
95.0%
96.9%
96.9%
94.3%
95.9%
93.8%
89.4%
97.1%
98.6%
93.8%
98.1%
100.0%
85.2%
100.0%