Side Extension approval rate in Horsham
Horsham approved 96.3% of side extension applications, based on 1,319 decisions analysed.
Last updated: March 2026
96.3%
side extension approval rate
1,319
Side Extension decisions
1,270
Approved
49
Refused
91.2%
Horsham overall
Side Extension applications are approved more often than the Horsham average (91.2%), suggesting the council is relatively receptive to these projects.
How side extension compares in Horsham
Side Extension
96.3%
Horsham all applications
91.2%
Planning a side extension in Horsham?
96.3% 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
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✓ 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 Horsham
95.3%
88.3%
78.6%
91.4%
89.5%
98.2%
90.2%
96.1%
96.8%
94.4%
84.7%
91.1%
96.9%
76.7%