In residential districts of unincorporated St. Clair County, the maximum principal building height is 35 feet. Detached accessory buildings such as garages and sheds are capped at 25 feet. Buildings used for governmental purposes may reach 100 feet.
The Area/Bulk Schedule (Sec. 40-3-7) caps principal building height in residential districts at 35 feet, and Note 4 confirms the 35-foot maximum for principal buildings other than governmental structures, which may reach 100 feet. Detached accessory buildings are limited to a 25-foot maximum height. These limits apply throughout the unincorporated county's residential and rural districts; industrial and business districts and municipalities apply their own standards.
Exceeding the height limit without a variance is a Class B misdemeanor, fined $50 to $500 plus costs (Sec. 40-11-10); relief requires an Area/Bulk Variance from the Zoning Board of Appeals.
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See how St. Clair County's structure height limits rules stack up against other locations.
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