Yes, when two things are true: the estimated construction cost is $50,000 or more, and the building is one the state accessibility law covers. Government Code 469.101 puts the line in statute: plans and specifications for the construction or substantial renovation of a covered building go to the department for review and approval when the estimated construction cost is at least $50,000. The agency's own frequently asked questions say the same thing from the other side: a project whose total estimated cost is under $50,000 is not submitted for registration or plan review, and a project of $50,000 or more submits a full set of construction documents under Administrative Rule 68.50.
On a commercial building in Travis, Williamson, Bastrop, Caldwell, Lee or Burnet County, that makes the accessibility line the second question to settle, right after the jurisdiction question. The permit office changes at the city line. The accessibility line does not: the statute keys it to the building and its estimated cost, not to which office permits the lot.
Where the lot sits decides the permit path, which is the subject of the permit guide for Austin and Travis County. The whole order of steps, from the lot to the finished building, runs on Building a Metal Building in the Austin Area.
SourcesTexas Department of Licensing and Regulation, Architectural Barriers frequently asked questions, read 2026-09-20; Texas Legislature Online, Government Code Chapter 469, elimination of architectural barriers, read 2026-09-20.