Residents in unincorporated St. Louis County may keep chickens as pets but may not breed them for sale or sell eggs. Chickens must not become a public nuisance under SLCRO §611.210. Each incorporated city sets its own poultry rules.
The county zoning code does not specifically authorize or prohibit small flocks in unincorporated areas — chickens are treated as pets and must comply with §611.210 (animal nuisance) and §602.050 (nuisance declaration covering noise, odor, and harborage). Selling eggs or birds converts the operation into 'agriculture' which requires zoning review. Roosters that disturb neighbors are subject to §716.075-style enforcement. Municipal residents must check city code — Maplewood, Brentwood, and Kirkwood allow limited flocks with permits; others prohibit them.
Notice of Violation for nuisance under §611.210; up to $1,000/day; flock removal required.
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