Accessory dwelling unit eligibility for properties in San Marcos
ADU rules in San Marcos depend on the property's jurisdiction and zoning. Properties within Austin's extraterritorial jurisdiction (ETJ) may follow Austin rules, while others follow San Marcos's local ordinances.
Use our search tool to check specific properties and see their zoning, lot size, and potential ADU eligibility.
Enter any San Marcos address to see lot size, zoning, and ADU potential.
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