San Patricio County Commercial Property Tax Protest

The Petrochemical Corridor’s Commercial Property Tax Challenge

A refinery maintenance contractor operating a fabrication and laydown facility in San Patricio County received their 2026 Notice of Appraised Value and found the assessment had increased 14% from the prior year — despite the facility sitting partially idle as the primary refinery client had moved some maintenance work in-house.

The property: a 4.5-acre industrial complex near Sinton with covered fabrication space, laydown yard, crane hardstand, and administrative office. Total improvements approximately 18,000 square feet. The district had assessed the property at $1.28 million, implying a per-square-foot value that the contractor found difficult to reconcile with what a buyer would pay for this type of industrial property in the current coastal South Texas market.

This scenario is common in San Patricio County — one of Texas’s significant industrial and petrochemical counties along the Gulf Coast. The county borders Nueces County (Corpus Christi) to the south, Aransas County to the east, Refugio County to the north, Bee County to the northwest, and Jim Wells County to the west. With a population of approximately 67,000 and a significant petrochemical, industrial, and port-adjacent commercial base, San Patricio County has more active commercial real estate than its neighbors — but substantially less market depth and institutional buyer interest than the Corpus Christi MSA.

What Made the Maintenance Contractor’s Protest Work

The contractor’s protest was organized around three evidence streams:

Income analysis with actual occupancy. Rather than using market rent assumptions for an active industrial yard, the protest relied on the property’s actual partial idling. With a third of the fabrication capacity unused due to the client’s in-sourcing, the effective income the property generated was significantly below what a fully occupied comparable facility might earn. The income approach, using actual occupancy and realistic coastal South Texas industrial cap rates (8.5% to 10.5% for non-institutional industrial properties), produced a market value of approximately $935,000 — 27% below the assessed value.

Comparable industrial properties in San Patricio County. The county’s commercial roll contained two comparable industrial laydown and fabrication properties, both assessed at lower per-square-foot values than the subject. This equity comparison, presented under §41.43, provided an independent path to reduction.

Economic context for the petrochemical market. Refinery and chemical plant maintenance cycles affect industrial property demand in coastal counties like San Patricio directly. When major clients bring maintenance work in-house or defer capital projects, the supporting industrial contractors lose income and may idle portions of their facilities. This demand cycle is documented in industry data and can be presented as context for reduced income and reduced market value.

At the informal hearing, the district’s appraiser engaged seriously with the income analysis and equity comparisons. The settlement came in at $975,000 — a 24% reduction from the $1.28 million assessed value. Annual tax savings at San Patricio County’s combined rate: approximately $7,000.

San Patricio County’s Commercial Property Landscape

San Patricio County encompasses several distinct commercial zones:

Sinton (County Seat): A modest commercial center with retail, services, and agricultural support. Sinton serves the county’s rural areas and smaller communities.

Mathis (US 359 Corridor): Highway commercial activity along the US 359 corridor between Corpus Christi and Laredo.

The Portland-Gregory Industrial Corridor: Portland, positioned on the north shore of the Nueces Bay and adjacent to the La Quinta Trade Gateway terminal and the Port of Corpus Christi access, has significant industrial and logistics activity. Properties in the Portland industrial corridor have some of the highest-value commercial assessments in San Patricio County.

Odem-Gregory Agricultural and Industrial Mix: The agricultural areas of northwest San Patricio County have commercial properties serving farming operations. Some industrial activity related to agricultural processing and chemical distribution also occurs in this zone.

San Patricio County Tax Rates

Taxing Entity	Approximate Rate Range
San Patricio County	0.38% – 0.52%
Sinton ISD	0.88% – 1.12%
Mathis ISD or Odem ISD	0.82% – 1.08%
Portland ISD	0.90% – 1.15%
City of Portland	0.48% – 0.62%
City of Sinton	0.42% – 0.55%
Special Districts	0.05% – 0.18%

Combined rates for Portland commercial properties typically range from 2.0% to 2.7%. Sinton and Mathis commercial properties see similar combined rates. Rural properties see lower combined rates of 1.5% to 2.0%.

At a 2.3% combined rate, a $1 million industrial property generates a $23,000 annual tax bill. A 20% overassessment means $4,600 per year in excess taxes.

Key Protest Strategies for San Patricio County

Petrochemical cycle documentation. For industrial properties serving refineries, chemical plants, and port operations, document how market conditions in those industries affect your property’s income and demand. Industry utilization rates, maintenance deferral data, and your own revenue history are compelling evidence.

Corpus Christi comparables — handle carefully. Nueces County (Corpus Christi) is the dominant commercial market in this region. San Patricio County properties that are genuinely comparable to Corpus Christi properties on the Port/industrial waterfront side have some connection to that market. But properties in Sinton or rural San Patricio County are not comparable to Corpus Christi port industrial properties and should not be valued using those benchmarks.

Portland industrial versus rural San Patricio. The Portland industrial corridor is fundamentally different from Sinton or Mathis commercial properties. If you are in the Portland corridor, your relevant comparables are other Portland industrial properties, not county-wide San Patricio averages that may pull in lower-value rural properties.

Personal property separation for industrial properties. Heavy industrial equipment, cranes, fabrication machinery, and process equipment are personal property — not real estate. If the district’s assessed value for your industrial property appears to incorporate specialized equipment value, challenge the personal property contamination.

How We Help San Patricio County Property Owners

We represent San Patricio County commercial property owners on contingency. Our five-step process:

Step 1: Free Assessment. We review your appraisal notice and identify overassessment grounds.

Step 2: Filing. We file before May 15 and handle all district communications.

Step 3: Gulf Coast Industrial Evidence Package. We build evidence calibrated for the San Patricio County market — petrochemical cycle documentation, income analysis, comparable industrial sales, and equity analysis from the county roll.

Step 4: Hearing Representation. We handle informal and formal ARB hearings.

Step 5: Verification. We confirm the reduced value is reflected in your tax bill.

For the complete Texas protest process, see our protest guide. For comparison with neighboring Gulf Coast markets, see our pages for Aransas County and Calhoun County.

Ready to protest your San Patricio County commercial property assessment? Contact LowerMyCommercialTax.com — we work on contingency, so you pay nothing unless we save you money.

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About the Author

Mike VanVickle is the founder of LowerMyCommercialTax.com, helping Texas commercial property owners reduce their tax burden through professional protest representation. With deep expertise in Texas property tax law and appraisal district processes, Mike and his team have helped property owners across all 254 Texas counties achieve meaningful reductions on a contingency basis — no savings, no fee.

Sources & References

• Texas Comptroller of Public Accounts — Property Tax System Basics
• Texas Property Tax Code, Title 1, Subtitle D — Tax Code §41.41
• San Patricio County Appraisal District — 2026 Appraisal Roll Data
• Texas Taxpayers and Research Association — Property Tax Reports

This guide was last reviewed and updated on May 22, 2026. Tax rates, deadlines, and procedures are subject to change. Consult your county appraisal district for the most current information.