In unincorporated St. Louis County, a single-family residence may keep at most 3 dogs, OR 5 cats, OR a combination of 5 dogs and cats with no more than 3 dogs at any time.
The Property Maintenance Code limits household pet counts in unincorporated areas only — each of the 88 incorporated cities sets its own pet limits (often stricter, e.g., 2-dog limits in Clayton). Exceeding the cap triggers a kennel-licensing requirement, which is not allowed in most residential zones. Service and assistance animals are not counted toward the limit.
Notice of Violation from Neighborhood Preservation Program with 30-day cure period; continuing violations referred to Municipal Court with fines up to $1,000.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
St. Louis County, MO
New trees may not be planted on a St. Louis County right-of-way between the sidewalk and the curb (SLCRO §1218.140). Existing right-of-way trees are owned by...
St. Louis County, MO
SLCRO §607.1005 permits residential backyard composting countywide if located ≥3 ft behind the main residential structure, screened from neighbors near prope...
St. Louis County, MO
Grass and weeds on residential property in unincorporated St. Louis County cannot exceed 8 inches in height. Property owners have 7 days after a violation no...
St. Louis County, MO
Under Missouri Constitution Article XIV §2, registered patients and adults 21+ may cultivate up to 6 flowering and 6 non-flowering marijuana plants per regis...
St. Louis County, MO
Missouri Amendment 3 (2022) legalized adult-use cannabis. St. Louis County allows licensed dispensaries in commercial zones subject to local zoning review. M...
St. Louis County, MO
SLCRO §1005.095 recognizes subdivision trust indentures — private agreements between trustees and homeowners — as the primary tool for enforcing subdivision-...
See how St. Louis County's pet limits rules stack up against other locations.
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