Can I put an accessory dwelling unit (ADU) on a lot inside a Texas city?

TexasReviewed October 2026

It depends on each city's zoning code; Texas has no statewide ADU law. A 2025 bill, SB 673, that would have set statewide ADU rules passed the Senate but died in the House. As an example, Austin allows additional dwelling units in its SF-1, SF-2 and SF-3 zones on lots of at least 5,750 square feet, requires a building permit, a unique address and a certificate of occupancy, and applies building and fire separation codes. Other cities may ban ADUs, cap their size, or require owner occupancy. Deed restrictions or an HOA can still prohibit one even where zoning allows it. Ask your city planning office for its current ADU rules.

Check your local rule. This varies by state, county or city. Your permitting office has the final word; the official lookup pages below show you who that is.

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General information, written in our own words from the sources listed with each answer. It is not legal, engineering, tax or financial advice. Rules change and differ by state, county and city, so confirm with the office that issues your permit before you build. Last reviewed October 2026.