ADU rules in Hidalgo County, TX — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Hidalgo County does NOT have an accessory dwelling unit (ADU) ordinance. Texas Local Government Code Chapter 233 limits county building-permit authority to commercial, public-accessible, and multifamily (4+ unit) structures, so single-family residential development in unincorporated areas is not subject to county zoning. The County Subdivision Rules permit no more than one single-family detached dwelling per platted lot. Cities such as McAllen, Edinburg, Mission, and Pharr regulate ADUs through their own zoning codes inside city limits.
Hidalgo County's authority to regulate land use is constrained by Texas Local Government Code §§233.061–233.067, which authorize county building permits only for commercial, public-accessible, multifamily (4+ unit), and similar non-single-family construction in unincorporated areas. The Hidalgo County Construction Permit Application (Chapter 232 LGC) confirms that no more than one single-family detached dwelling is permitted per lot, and that all setbacks and finish-floor elevations must comply with the recorded subdivision plat and any applicable deed restrictions. The County's Planning/Subdivision Plat Division (100 N. Closner, Edinburg) reviews subdivision plats but does not impose ADU-specific standards. Inside the City of McAllen, Edinburg, Mission, or Pharr, the municipal zoning code governs whether an ADU is permitted, what minimum lot size applies, and whether owner occupancy or short-term rental restrictions apply. Property owners in colonias and other unincorporated subdivisions should confirm any private deed restrictions, which Texas Property Code Chapter 202 makes enforceable in county and district courts.
No county-level penalty for adding an ADU to a single-family lot in unincorporated Hidalgo County. Violations of recorded plat setbacks or deed restrictions can be enforced by HOAs or neighbors via civil suit. Inside city limits, municipal zoning violations are typically Class C misdemeanors with fines up to $500 per day under Texas Local Government Code §54.001.
Hidalgo County, TX
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See how Hidalgo County's adu rules rules stack up against other locations.
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