The answer flips at the city line, and a court complex usually wants land outside one. Inside Austin a building permit is required to erect, construct, enlarge or alter any building within the city zoning jurisdiction, and commercial projects are reviewed under the 2024 International Building Code with local amendments.
Outside the cities, read the county. Travis County requires a Development Permit, and a commercial project that is not a dwelling files the Development (Non-Residential) permit with a sealed construction cost estimate and a site plan sealed by a Texas-licensed engineer. Williamson County publishes the opposite answer: its own pages state that the county issues no building permits and has no authority to issue a certificate of occupancy.
That is an absence on the county pages, not an absence of rules. Unincorporated Williamson County has used the 2018 International Fire Code and the Williamson County Fire Code since November 2020, and it requires a Fire Marshal permit before construction of a commercial establishment or public building starts. More on the Austin and Travis County permit guide and building a metal building in the Austin area.
Each jurisdiction in its own words, 2026-09-20.
On a phone this table scrolls sideways.
SourcesCity of Austin Development Services, commercial plan review, read 2026-09-20; The source was read and does not list this.Williamson County, frequently asked questions, infrastructure and developers, read 2026-09-20; Williamson County Fire Marshal, construction permits, and the Williamson County Fire Code, second edition, read 2026-09-20; Travis County TNR Development Services, Commercial Site Plan, read 2026-09-20.