Bexar County, TX Building Setbacks & Zoning: Setback Rules (2026)

Under Texas law, counties do not have general zoning power, so Bexar County cannot impose traditional residential setback requirements the way San Antonio or other incorporated cities do. In practice, setbacks that apply to a lot in unincorporated Bexar County come from one of four sources. First, the recorded subdivision plat may show building lines that must be honored. Second, deed restrictions and HOA covenants running with master-planned suburbs north and northwest of San Antonio commonly impose 20 to 30 foot front setbacks, 5 to 10 foot side yards, and 15 to 20 foot rear setbacks. Third, on-site sewage facility rules enforced by Bexar County Public Works require minimum separation distances between structures, property lines, water wells, and septic system components. Fourth, any development within the Extra-Territorial Jurisdiction of San Antonio or a suburban city like Schertz, Converse, or Live Oak may be subject to that city's subdivision standards even though zoning does not apply in the ETJ. Owners should pull the plat, any applicable CCRs, and verify OSSF setbacks before pouring a foundation or adding an accessory structure.