Side Extension approval rate in Horsham
Horsham approved 96.2% of side extension applications, based on 1,406 decisions analysed.
Last updated: September 2026
96.2%
side extension approval rate
1,406
Side Extension decisions
1,353
Approved
53
Refused
88.0%
Horsham overall
Side Extension applications are approved more often than the Horsham average (88.0%), suggesting the council is relatively receptive to these projects.
How side extension compares in Horsham
Side Extension
96.2%
Horsham all applications
88.0%
Planning a side extension in Horsham?
96.2% 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 Horsham →
✓ 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 Horsham and any other published UK council — see the data services →
Other project types in Horsham
88.7%
95.2%
78.9%
91.8%
89.7%
98.4%
90.4%
95.9%
97.1%
94.8%
84.6%
91.8%
97.3%
76.7%