Texas
Buying Land in Webb County, Texas
Webb County -- Laredo, on the Rio Grande -- is one of the four original counties named in Texas's colonias-prevention laws, and the numbers back that up: 41 recognized colonias countywide. Its groundwater picture is also mid-change, with a brand-new but narrowly bounded conservation district recently authorized.
A border county built around trade -- and around colonias-prevention law
Webb County is best known nationally as the seat of Laredo, the busiest inland port on the US-Mexico border and a major hub for cross-border trade and logistics. That border-adjacency matters just as much for land-use rules as it does for freight volumes: Webb County was one of the four counties -- alongside Cameron, Hidalgo, and El Paso -- originally singled out in Texas's colonias-prevention statutes, the state's response to decades of unregulated, underserved subdivisions along the border that lacked basic water, sewer, and road infrastructure. Because the whole county sits within 50 miles of the border, it is classified as a "Subchapter B" county and must apply the Texas Water Development Board's Model Subdivision Rules to new residential subdivisions -- a real, additional layer on top of the general statewide subdivision-platting baseline described on our Texas state page.
This isn't an abstract, theoretical designation for Webb County: the Texas Water Development Board's own program data recognizes 41 colonias within the county, and 15 of those -- ten scattered along State Highway 359 and five along FM 1472 (Mines Road) -- have been formally recognized as economically distressed areas eligible for infrastructure funding. A NADBank/BEIF-funded water and sewer project covering those 15 colonias, once cited as serving roughly 3,725 residents across 900 households, actually traces to a 1996 TWDB survey and began construction back in December 2004 -- a historical, likely-completed project rather than a current or recent one (CORRECTED 2026-09, superseding an earlier framing that presented these figures as describing a recent, ongoing effort). Since January 2007, Webb County has extended water service to more than ten colonias. See the standalone subdividing-land page for what the Model Subdivision Rules actually require of a new subdivider here, and why an older, informally platted tract in one of these areas deserves extra diligence.
Groundwater: mostly unregulated, but a narrow new district just got authorized
For most of Webb County, there is no groundwater conservation district, so Texas's rule of capture applies: a landowner can generally pump what can be put to beneficial use without a district permitting wells, setting spacing rules, or capping production. Rural parts of the county -- communities like Bruni and Mirando City in the southeast -- rely on groundwater for municipal supply, while the city of Laredo itself draws primarily on Rio Grande surface water rather than wells.
That said, the picture is not entirely static: in 2023, the Texas Legislature passed Senate Bill 2570, authorizing the creation of a Webb County Groundwater Conservation District with the authority to impose fees. Notably, the new district's boundary is not countywide -- it is drawn coextensive with the Legacy Water Control and Improvement District, meaning it would regulate groundwater only within that specific service area rather than across all of Webb County. As with any legislatively authorized district, activation still requires a local voter confirmation election, and this research found no confirmation that election has occurred or that the district is currently operating. A landowner near the Legacy WCID service area, in particular, should check current status directly rather than assume either the rule of capture or a functioning district applies by default.
Septic permitting and agricultural valuation
Webb County falls within TCEQ Region 16, headquartered in Laredo -- one of the few counties in Texas where the regional TCEQ office and the county seat are the same city. On-site sewage facility (septic) permit applications for Webb County are processed through the City of Laredo's Environmental Health Department, but the department's own posted fee schedule lists the OSSF permit fee as payable directly to TCEQ rather than the county, which suggests a delegated local intake and inspection role rather than the county holding fully independent authorized-agent status with its own fee schedule. Confirm the current arrangement, fees, and timeline directly before budgeting a system.
Given the county's mix of ranching, brush country, and irrigated tracts along the Rio Grande, it's also worth confirming with the Webb County Appraisal District what documentation is required to establish or transfer an agricultural (1-d-1) valuation, since Texas generally requires land to have been used principally for agriculture for at least five of the preceding seven years, and a change in ownership or use can trigger a review -- and a rollback tax recapturing prior tax savings -- if the land is converted away from qualifying use.
Who to Call Before Buying Land in Webb County
Webb County has no general zoning authority under Texas law, so there is no separate planning_zoning entry above. This research could not confirm whether the 2023-authorized Webb County Groundwater Conservation District has held its confirmation election or begun operating -- confirm current status with the Webb County Commissioners Court or the Texas Water Development Board directly.
Environmental Health
City of Laredo Environmental Health Department
On-site sewage facility (septic) permit applications for Webb County.
Subdivision & Land Development
Webb County Planning Department
Subdivision platting, Model Subdivision Rules compliance, and current county subdivision regulations.
Assessor / Property Tax
Webb County Appraisal District
Assessed value, property tax, and agricultural (1-d-1) valuation questions for a specific parcel.
Recorder / Clerk / Land Records
Webb County Clerk
Recorded deeds, subdivision plats, and land-record history for a specific parcel.
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Get local guidanceTopics Specific to Webb County
Sources
- Colonias Prevention Laws — Office of the Texas Attorney General (accessed 2026-09)
- Economically Distressed Areas Program — Texas Water Development Board (accessed 2026-09)
- STATE OF TEXAS Annual Report: Economically Distressed Areas Program — Texas Water Development Board (accessed 2026-09)
- SB 2570: Relating to the Creation of the Webb County Groundwater Conservation District — Texas Legislature Online (accessed 2026-09)
- Which TCEQ Region is My County In? — Texas Commission on Environmental Quality (TCEQ) (accessed 2026-09)
- Permits and Fees -- Environmental Health — City of Laredo (accessed 2026-09)
- Hydrogeology of Webb County, Texas — US Geological Survey (accessed 2026-09)
- Webb County, Texas — Wikipedia (accessed 2026-09)
Last reviewed 2026-09