St. Charles County, MO Building Setbacks & Zoning: Structure Height Limits (2026)

405 et seq. 410 layers on the exceptions and the process for going higher. Subsection (A) makes clear that the forty-foot cap in Part 2 can be exceeded only by a variance from the St. Charles County Board of Zoning Adjustment, but it carves out agricultural structures and stealth communication or telecommunication devices added to existing structures, which are exempt from the height cap entirely. Subsection (B) lets spires, steeples, monuments, and belfries on buildings used for religious worship rise to one hundred feet without a variance.

Subsection (C) hands wind turbine and wind turbine farm height entirely to the Governing Body's discretion when it approves the conditional use permit for that use, rather than fixing a numeric ceiling in the ordinance. Subsection (D), added by Ordinance No. 18-060 in 2018, does the same for brewhouse structures built in Agricultural Zoning Districts: their height is set case by case in the conditional use permit approval rather than by a blanket rule. A property owner who wants to exceed forty feet for an ordinary residence, garage, or accessory structure has only the variance route through the Board of Zoning Adjustment, which requires showing the hardship criteria the Board applies to setback and dimensional variances generally.