Annex approval rate in Horsham
Horsham approved 84.7% of annex applications, based on 144 decisions analysed.
Last updated: March 2026
84.7%
annex approval rate
144
Annex decisions
122
Approved
22
Refused
91.2%
Horsham overall
Annex applications are refused more often than the Horsham average (91.2%), suggesting the council scrutinises these projects more closely.
How annex compares in Horsham
Annex
84.7%
Horsham all applications
91.2%
Planning a annex in Horsham?
84.7% get approved — but the odds vary by street. Your Pro Report shows exactly what gets approved and refused near your property.
✓ Your ward's annex approval rate
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✓ Nearest comparable annex 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%
96.3%
78.6%
91.4%
89.5%
98.2%
90.2%
96.1%
96.8%
94.4%
91.1%
96.9%
76.7%