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Houston ADU questions, answered
Each guide starts with the short answer, then the detail and the cases where it depends on your lot. Rules and figures carry a date and a source.
Updated October 2026
How much does an ADU cost in Houston?
Published 2026 ranges by type, and why flood elevation and soil move the price.
Read the guideCan I build an ADU in Houston if the city has no zoning?
Chapter 42, the 1,500 sq ft rule and what still applies.
Read the guideCan deed restrictions stop me from building an ADU in Houston?
Yes, sometimes. What wording to look for and who enforces it.
Read the guideHow do Houston's floodplain rules affect an ADU?
Two feet above the 500-year elevation, and what that means for the foundation.
Read the guideHow much rent can an ADU make in Houston?
October 2026 rents and the rules that limit renting.
Read the guideDoes Texas have a statewide ADU law?
No. What happened to SB 673, and what passed instead.
Read the guideCheck what your lot allows
The guides explain the rules. For your address, we do the lookup.