Side Extension approval rate in Barnet
Barnet approved 81.5% of side extension applications, based on 6,831 decisions analysed.
Last updated: September 2026
81.5%
side extension approval rate
6,831
Side Extension decisions
5,566
Approved
1,265
Refused
79.6%
Barnet overall
Side Extension applications are approved at roughly the same rate as the Barnet average (79.6%).
How side extension compares in Barnet
Side Extension
81.5%
Barnet all applications
79.6%
Planning a side extension in Barnet?
81.5% 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 Barnet →
✓ 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 Barnet and any other published UK council — see the data services →
Other project types in Barnet
75.7%
82.3%
81.0%
80.7%
76.2%
81.8%
77.9%
80.1%
83.0%
81.7%
78.6%
81.3%
82.2%
43.9%
72.0%