Garage conversion rules in Schertz, TX — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Unincorporated Guadalupe County neither zones nor permits garage conversions. Converting a garage into living space with a bathroom triggers an on-site sewage (OSSF) review under Health & Safety Code Chapter 366.
Guadalupe County cannot zone, so converting a garage to a bedroom, office, or apartment needs no county building permit and faces no county parking or use rule in the unincorporated county. The constraint arrives when the conversion adds a bathroom or kitchen: added wastewater load means Section 366.051 requires a permit and approved plan to alter or extend the on-site sewage disposal system, with Guadalupe County Environmental Health acting as the authorized agent. If the conversion creates a separate rental unit, HOA deed restrictions barring second dwellings apply. Electrical additions follow the National Electrical Code through a state-licensed electrician.
Adding a bathroom in a garage conversion on septic without an OSSF permit violates Chapter 366. A conversion breaching HOA deed restrictions is enforced by the association.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Schertz's garage conversions rules stack up against other locations.
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