ADU rules in Cameron County, TX — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Texas counties have no general zoning power, so unincorporated Cameron County sets no accessory-dwelling-unit rule. Whether you may add an ADU, garage apartment, or second home is governed by your incorporated city (Brownsville, Harlingen, San Benito) or, in the unincorporated county, only by septic and subdivision-platting requirements.
The Texas Local Government Code grants counties no authority to zone or to cap the number or type of dwellings on a lot outside city limits. So Cameron County has no ADU/granny-flat ordinance. The controls that DO apply county-wide are the on-site sewage facility (OSSF/septic) permit under Health & Safety Code Ch. 366 and 30 TAC 285, and subdivision platting under LGC Ch. 232 (Rio Grande Valley border counties also enforce Model Subdivision Rules for water, sewer, and road access). Inside a city, that city's zoning code controls ADUs. Always confirm with the city building department or, in unincorporated areas, the Cameron County Engineering/Health departments.
No county ADU penalty exists. Building a dwelling without the required septic permit (H&S Ch. 366) or an approved subdivision plat (LGC Ch. 232) can bring county enforcement, permit denial, and civil penalties.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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Home composting is allowed in Cameron County. Texas law protects it: an HOA cannot ban composting of yard vegetation, but a compost pile that draws pests cou...
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Cameron County has no ordinance banning or regulating artificial turf on private property. Cities may set their own rules, and an HOA may steer choices towar...
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Cameron County places no restriction on using native or drought-resistant plants. Texas law actually protects that choice: an HOA cannot ban water-conserving...
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Rainwater harvesting is legal and encouraged in Texas. Cameron County can't deny a building permit just because a project uses rainwater collection, and HOAs...
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Cameron County itself sets no lawn-watering schedule. Restrictions come from your water utility or irrigation district's state-required drought contingency p...
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There is no city-style weed ordinance for private lots, but Texas Health & Safety Code Chapter 343 lets Cameron County treat overgrown weeds in the unincorpo...
See how Cameron County's adu rules rules stack up against other locations.
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