ADU Regulations in Brownsville, Texas
Updated September 29, 2026
At the southern tip of Texas in Cameron County, Brownsville permits ADUs under local ordinance. The city's proximity to the Rio Grande means flood mitigation rules may apply alongside ADU zoning requirements.
Below is a summary of the key zoning rules applicable to Accessory Dwelling Units in Brownsville as of 2026. Regulations are governed by local zoning ordinances, as Texas has no statewide ADU mandate.
| Regulation | Requirement |
|---|---|
| Maximum Size | 1,000 sq ft |
| Property Setbacks | 5 ft rear, 5 ft side |
| Extra Parking Required | Required (1 space) |
| Owner Occupancy | Not required |
Additional Local Requirements for Brownsville
- ADU allowed in residential zones per local ordinance
- Minimum 200 sq ft
- Building permit required
- ⚠️ TX has NO statewide ADU law — city code governs
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Can I build an ADU in Brownsville?
This Texas city permits ADUs under local ordinance. Verify your specific zoning district with the planning department before applying.
What is the maximum ADU size allowed in Brownsville?
ADUs in Brownsville can be up to 1,000 square feet, subject to the property's zoning and lot coverage limits. Always confirm the exact allowed size with the Brownsville planning department before designing your project.
What are the setback requirements for an ADU in Brownsville?
ADUs in Brownsville generally require setbacks of 5 ft rear, 5 ft side. Texas has no statewide ADU mandate — the exact setback figures come from Brownsville's own zoning code, so confirm them with the city planning department before you design.
Disclaimer: This guide summarises publicly available city zoning rules and is for general information only — it is not legal or architectural advice. Codes change; always confirm current requirements with the Brownsville planning department before you design or build.