Resource Guide
Texas ADU Laws: What Homeowners in DFW Need to Know
Texas state law affects what your city can and cannot restrict when it comes to ADU construction. Here's what's changed, what's coming, and what it means for your garage apartment project in DFW.
How Texas ADU Law Works
In Texas, zoning authority is primarily held by municipalities — cities set their own rules for what can be built in residential areas, including ADUs. There is no single statewide ADU ordinance that overrides local city codes.
However, the Texas Legislature has taken increasing interest in housing affordability, and there have been efforts to preempt local zoning restrictions on ADUs — similar to what California did with SB 9 and SB 10. Monitoring these legislative developments matters for DFW homeowners considering ADU construction.
Recent Legislative Developments
Texas has seen multiple ADU-related bills introduced in recent legislative sessions. The most significant trend: proposals to limit cities' ability to prohibit ADUs outright in single-family zones. Some bills have passed; others have stalled.
The practical effect for DFW homeowners: cities that were previously restrictive on ADUs may face pressure to liberalize their codes. Fort Worth and Denton already have relatively permissive ordinances. Dallas has been moving toward broader ADUO overlay coverage.
We monitor Texas ADU legislation actively and will update this guide when significant changes occur.
Texas Building Codes for ADUs
Texas residential construction follows the International Residential Code (IRC), with state and local amendments. Key requirements that affect ADU construction:
Egress windows: Required in all sleeping rooms — minimum 5.7 sq ft opening, 24" height, 20" width, maximum 44" sill height.
Fire separation: When living space is built above or adjacent to a garage, a 1-hour fire-rated assembly is required between the garage and living area.
Mechanical systems: HVAC, plumbing, and electrical must meet IRC and local amendments. Mini-split HVAC systems are popular and code-compliant for ADUs.
Accessibility: Standard residential ADUs are not required to be ADA-accessible unless the owner chooses to incorporate those features (which we do frequently for aging-in-place builds).
Short-Term Rental Rules for ADUs in Texas
Texas does not have a statewide law governing short-term rentals (Airbnb, VRBO). Individual cities regulate short-term rentals independently.
In DFW: Fort Worth requires a short-term rental license. Dallas has restrictions on short-term rentals in some residential zones. Other DFW cities vary. If you're planning to use your garage apartment as a short-term rental, verify local STR rules before finalizing your plans.