San Marcos, CA Animal Ordinances: Livestock (2026)

The City of San Marcos allows livestock on properties zoned for rural residential, estate residential, or agricultural use that meet minimum lot size thresholds. Horses are a common livestock animal in the area, particularly in the eastern portions of the city near rural zones. Animal density limits typically allow one large animal (horse, cow) per half-acre of usable land, with additional animals permitted on larger parcels. Goats, sheep, and pigs may be permitted with smaller lot sizes depending on the zoning district. All animal enclosures, stables, and corrals must be set back a minimum distance from neighboring dwellings and property lines — typically 50 feet for large animal shelters and 20 feet for small animal enclosures. Manure must be removed or composted regularly to prevent odor, fly breeding, and water contamination. The San Diego County Department of Environmental Health may inspect properties for compliance with waste management standards. Feed must be stored in enclosed, rodent-proof containers. Water troughs and irrigation must not create runoff onto adjacent properties or public streets. Code Enforcement at (760) 744-1050 x3234 handles complaints related to livestock nuisance conditions.