Building Codes Across the Austin Suburbs, Compared

Contractors in the Austin metro work across a dozen jurisdictions, and those cities don't all use the same building codes. A deck, stair or electrical detail that passes in one city may fail inspection in the next. If you're hiring someone who mostly works elsewhere, use this table to ask the right question: "Are you current on the code my city uses?"

Code editions and permit systems (as of October 2026)

"Per city adoption" means we couldn't confirm the edition from an official page as of this writing. Ask the city.

Why code editions matter to you

• Inspections. Your project is inspected to your city's adopted code. A contractor using another city's habits risks failed inspections and delays.
• Electrical details. NEC editions change GFCI and AFCI requirements, among other things. The 2020, 2023 and 2026 NEC editions all appear in this metro.
• Energy provisions. IECC editions affect insulation, air sealing and duct testing.
• Plan sets. Designers note the code edition on drawings. Check that it matches your city.

The "one-permit" cities

Round Rock and Buda both use one-permit approaches: subcontractors are listed on the main building permit. Get your electrician, plumber and HVAC contractor named before applying, or the permit stalls.

Outside city limits

In unincorporated areas and most ETJs, there may be no city building permit. Texas counties generally don't run residential building permit programs, though septic (OSSF), floodplain and driveway rules apply, and state law sets IRC standards for new homes in covered counties. See Dripping Springs and Liberty Hill.

How to look up your own jurisdiction

1. Confirm you're inside city limits. Your appraisal district record (Travis, Williamson or Hays CAD) or the city's GIS map shows whether a parcel is in the city, its extraterritorial jurisdiction, or unincorporated county. A Round Rock or Georgetown mailing address doesn't guarantee city jurisdiction.
2. Find the city's code adoption ordinance on its building department page. It lists editions and local amendments.
3. Check contractor registration. Several cities require contractors to register before they can pull permits.
4. Ask about plan review. Smaller cities may review faster but have fewer inspectors, so schedule inspections early.
5. Look for local amendments on topics like wind loads, fire sprinklers in one- and two-family homes, and energy code compliance paths. These can change what a contractor must build.

For buyers and sellers

If you're buying a recently remodeled home, ask for permits and final inspection records. Each city's permit portal usually lets you search by address. Work done under an older code edition isn't wrong. It just shows when the work was approved.