US Land Life

Texas

Buying Land in Starr County, Texas

Starr County, seat Rio Grande City, sits deep in the Rio Grande border region -- and it isn't just subject to Texas's general colonias-prevention framework, it's one of the handful of counties that framework was built specifically to address. Its water governance and a major binational reservoir add their own local layers.

A Combined Drainage-and-Groundwater District, With Priority Over Local Utilities

Case-by-case / verify locally

Starr County has its own Starr County Drainage and Groundwater Conservation District, created under the Texas Constitution as a single district handling both drainage and groundwater conservation rather than the more common single-purpose GCD model. Notably, where the district's groundwater rules conflict with a rule of a regional water authority or a municipally owned utility or water/sewer service corporation operating inside the district's territory, the district's rules control -- a real, specific priority worth knowing about if a parcel's water service currently comes through one of those other entities.

Among Texas's Highest Colonia Counts -- With an Active State Assistance Program

Case-by-case / verify locally

Starr County is one of just six Texas counties -- alongside El Paso, Maverick, Webb, Hidalgo, and Cameron -- identified as having the largest colonia populations in the state; those six counties together account for 1,854 colonias and roughly 369,482 residents. Starr also hosts one of only seven Texas Department of Housing and Community Affairs Colonia Self-Help Centers on the entire border -- under a 2015 TDHCA contract (the most specific figures this research could locate), it served five named colonias with roughly 1,746 residents; that figure is now over a decade old and should be reconfirmed as the program's current caseload rather than assumed current. See the standalone housing-mitigation-requirements page for what that program does and what it signals about buying land in or near an existing Starr County colonia.

Falcon Lake: A Real Binational Reservoir and State Park

Generally favorable

Falcon International Reservoir, formed by Falcon Dam on the Rio Grande and jointly managed under the US-Mexico International Boundary and Water Commission, spans the Texas-Mexico border along the Starr/Zapata county line and provides irrigation, flood control, and hydroelectric power alongside recreational fishing and boating. The adjoining 576-acre Falcon State Park, leased from the IBWC in 1949 and later acquired outright by the state in 1974, is a genuine, long-standing recreational anchor for land near the lake.

Water governance: a combined district with real regulatory teeth

Starr County's approach to water is structurally different from a lot of Texas counties covered in this research: rather than a standalone groundwater conservation district layered separately on top of whatever drainage authority exists, the county has a single Starr County Drainage and Groundwater Conservation District, established under Section 59, Article XVI of the Texas Constitution, that handles both functions. The district's groundwater rules are also given explicit priority in the event of a conflict: where a district rule concerning groundwater conflicts with a rule adopted by a regional water authority, or with an action taken by a municipally owned utility or a water or sewer service corporation whose certificated service area falls wholly or partly inside the district, the district's rule controls. For a buyer relying on a specific water utility or service corporation for supply, that priority relationship -- not just the utility's own tariff -- is worth understanding directly from the district.

This research did not pull the district's complete current well-permitting fee schedule or spacing rules; those should be confirmed directly with the district's Rio Grande City office before finalizing plans for a new well.

Colonias, subdivisions, and the border recreation economy

Because Starr County sits within the state's colonias-prevention zone, new residential subdivisions here are subject to the same "build it or bond it" framework that applies across the Texas border region: a subdivider generally must install water, sewer, road, and drainage infrastructure before final plat approval, or post a financial guarantee (typically formalized through a Subdivision Construction Agreement) covering that cost if it's not yet complete. What sets Starr County apart isn't the existence of that framework -- it's the scale of the underlying problem it was built to solve. State assessments identify Starr as one of just six Texas counties, alongside El Paso, Maverick, Webb, Hidalgo, and Cameron, with the largest colonia populations in the state, and those six together account for 1,854 colonias housing roughly 369,482 people. In direct response, Starr County hosts one of only seven Colonia Self-Help Centers along the entire Texas-Mexico border, an active state-funded program providing hands-on housing, platting, and construction assistance to residents of five specific named colonias in the county. The standalone housing-mitigation-requirements page below covers what that program actually offers and what it means for land already sitting inside one of those colonias.

Away from the colonias, Starr County's other defining geographic feature is Falcon International Reservoir and its adjoining state park -- a genuinely binational piece of infrastructure built via a US-Mexico agreement and managed in coordination with the International Boundary and Water Commission, offering real recreational and fishing-tourism value for land near the lake on the Texas side. On septic, this research did not confirm whether Starr County holds TCEQ OSSF authorized-agent status; either way, given the colonias-prevention framework's own water/sewer requirements for new subdivisions, a specific plat's utility-service plan is likely to matter as much as, or more than, an individual OSSF permit for a standalone lot here.

Who to Call Before Buying Land in Starr County

Starr County has no general zoning authority under Texas law, so there is no planning_zoning entry above; contact the Commissioners Court for subdivision and platting questions, including current Model Subdivision Rules compliance. We were not able to independently confirm Starr County's current TCEQ OSSF authorized-agent status within this research's scope -- confirm directly with the county or TCEQ.

Wells / Private Water

Starr County Drainage and Groundwater Conservation District

Well permitting, drainage, and groundwater rules for Starr County, including priority over conflicting utility rules.

Official website →

Subdivision & Land Development

Starr County Commissioners Court / Colonias Prevention

Subdivision platting, Model Subdivision Rules compliance, and colonias-prevention requirements for new residential development.

Official website →

Other

TDHCA Office of Colonia Initiatives -- Starr County Self-Help Center

Housing rehabilitation, new construction, surveying/platting, and contract-for-deed conversion assistance for eligible colonia residents.

Official website →

Assessor / Property Tax

Starr County Appraisal District

Assessed value, property tax, and agricultural valuation questions for a specific parcel.

Phone: (956) 487-5613Official website →

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Topics Specific to Starr County

Colonia Housing Assistance in Starr County: The Self-Help Center Program →

Sources

  1. Special District Local Laws Code Chapter 11022 -- Starr County Drainage and Groundwater Conservation District — Texas Statutes (accessed 2026-09)
  2. As Colony Ridge controversy swirls, a primer on 'colonias' in Texas — The Center Square (accessed 2026-09)
  3. Background on the Colonias — Texas Department of Housing and Community Affairs (TDHCA) (accessed 2026-09)
  4. State housing agency's $700,000 contract to improve living standards in five Starr County colonias — Texas Department of Housing and Community Affairs (TDHCA) (accessed 2026-09)
  5. Colonia Self-Help Center (SHC) Program — Texas Department of Housing and Community Affairs (TDHCA) (accessed 2026-09)
  6. Falcon State Park — Wikipedia (accessed 2026-09)
  7. International Falcon Reservoir: Overview, History, and Recreation — Texas State Historical Association (accessed 2026-09)
  8. Colonias Prevention Laws — Office of the Texas Attorney General (accessed 2026-09)

Last reviewed 2026-09