Side Extension approval rate in County Durham
County Durham approved 97.1% of side extension applications, based on 916 decisions analysed.
Last updated: September 2026
97.1%
side extension approval rate
916
Side Extension decisions
889
Approved
27
Refused
94.0%
County Durham overall
Side Extension applications are approved more often than the County Durham average (94.0%), suggesting the council is relatively receptive to these projects.
How side extension compares in County Durham
Side Extension
97.1%
County Durham all applications
94.0%
Planning a side extension in County Durham?
97.1% 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 County Durham →
✓ 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 County Durham and any other published UK council — see the data services →
Other project types in County Durham
95.7%
97.7%
95.6%
89.5%
95.8%
95.9%
97.1%
98.9%
73.9%
94.7%
98.7%
95.3%
94.6%
78.3%