Bexar County has very limited setback authority because Texas counties cannot zone. Setbacks come from subdivision plats, HOA CCRs, OSSF septic rules, or Chapter 232 plat regulations.
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.
A structure built across a platted building line or in violation of recorded CCRs can be the subject of a private enforcement action by the HOA or neighboring lot owners, including injunctive relief and attorneys fees. OSSF setback violations can require relocation of septic components at the owner's expense. Contact Bexar County Public Works at (210) 335-6700.
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See how Bexar County's setback rules rules stack up against other locations.
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