Bolthole Index

Calhoun County, Texas

Building permits, zoning and land rules in Calhoun County, Texas

48Index Score / 100
#152 of 254 in Texas

Unincorporated Calhoun County, Texas requires a Floodplain Development Permit for development in special flood-hazard areas; we could not confirm a general residential building permit outside that program12. County zoning does not restrict RV or tiny-home occupancy, minimum home or lot size, or setbacks on unincorporated land3. Municipal zoning applies inside Point Comfort, while Victoria County Public Health administers Calhoun County septic permitting45.

At a glance

Building permit
Required in special flood-hazard areas; no general residential permit confirmed outside that program12
Zoning
No county zoning on unincorporated land; municipal zoning provisions in Seadrift and Point Comfort674
Septic permits
Victoria County Public Health Department, Environmental Services (TCEQ authorized agent for Calhoun County)85
RV / tiny home living
No county zoning restriction on unincorporated land; septic and floodplain requirements still apply6910
Owner-builder (septic)
Owner installation for an owner’s single-family home is conditional on local approval, ownership, no sale or lease, and all OSSF requirements11
Water well drilling
No drilling permit required, but written notice to the Calhoun County Groundwater Conservation District is required before drilling12
Floodplain permit
$60; expires 6 months after issuance13
Septic soil difficulty
Only 6.1% of county soils are free of severe limits for a conventional drain field14

Who to call

Floodplain permits

Calhoun County Floodplain Administration

Floodplain Development Permits under the county's Flood Damage Prevention Order for land in mapped Special Flood Hazard Areas

361-553-4455

211 S. Ann Street Suite 301, Port Lavaca, TX 77979

Septic permits

Victoria County Public Health Department, Environmental Services

OSSF (septic) permit applications, site evaluations, planning-material review and inspections for Calhoun, Victoria and DeWitt counties

361-578-6281

2805 N Navarro, Victoria, TX 77901

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

Off-grid gear

Going off-grid in Calhoun County means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Calhoun County, Texas?

Calhoun County requires a Floodplain Development Permit for construction, alteration and other development in special flood-hazard areas within the county's jurisdiction1. We could not confirm a general residential building permit for unincorporated land outside that floodplain program2. Calhoun County administers subdivision and development approvals and has policies for Substantial Improvement and Substantial Damage determinations, but we could not confirm a comprehensive countywide building code1516. The Floodplain Development Permit costs $60, expires after 6 months, and must be paid by check, money order or exact cash; credit and debit cards are not accepted13.

Who issues building and septic permits in Calhoun County?

For unincorporated land subject to floodplain permitting, contact Calhoun County Floodplain Administration at 211 S. Ann Street Suite 301, Port Lavaca, TX 77979, or 361-553-4455171. We could not confirm a county office that issues general residential building permits or performs ordinary building inspections outside that program2. County development matters go through the Commissioners Court or Floodplain Office, including subdivision regulations and development permits18. Victoria County Public Health Department Environmental Services administers Calhoun County's septic program, including applications, site evaluations, planning review and OSSF inspections; call 361-578-6281 for septic assistance19520.

Does Calhoun County have zoning?

Unincorporated Calhoun County has no county zoning ordinance, but county subdivision and floodplain requirements still apply6211. Seadrift's municipal code covers zoning and lists land-use-control and Planning Commission ordinances; ask Seadrift City Hall for the district, permitted uses and dimensional standards for a city parcel7. Point Comfort administers its own zoning, with residential and commercial/industrial districts; zoning changes go through the Zoning Commission and City Council422. Municipal zoning does not transfer Calhoun County's septic program to a city zoning office: Victoria County Public Health Department Environmental Services remains the OSSF authority5. Dividing unincorporated land for sale, rent, lease, or residential or commercial development triggers county subdivision rules, subject to listed exceptions21.

How do septic permits work in Calhoun County?

An OSSF (on-site sewage facility, commonly called a septic system) in Calhoun County generally needs a permit and approved plan administered through Victoria County Public Health Department Environmental Services192324. The local program reviews applications, site evaluations and planning materials and conducts construction or compliance inspections; the source does not say every existing system receives periodic inspection20. Off-grid property is not exempt: septic systems and holding tanks remain subject to applicable permits, construction, operation, maintenance and inspection rules, and the available rule does not establish approval for every alternative sanitation method9. Owners may install an OSSF for their own single-family dwelling only if the local authority allows it and all ownership, no-sale-or-lease, permitting and construction conditions are met11. Only 6.1% of county soils are rated without severe limitations for a conventional drain field, so arrange the site evaluation early14.

Can you live in an RV or tiny home on your land in Calhoun County?

For an RV or tiny home on unincorporated Calhoun County land, plan sewage disposal and flood-zone compliance before choosing a homesite: off-grid OSSFs and holding tanks remain subject to applicable requirements, and mobile or manufactured homes are prohibited in VE flood zones910. Ask Calhoun County Floodplain Administration whether the parcel needs a Floodplain Development Permit before placing or building a dwelling171. Inside Port Lavaca, modular, manufactured and tiny homes require a certificate of occupancy before occupancy or a change of occupancy25. Inside Point Comfort, check the proposed use against the city's zoning districts; Seadrift City Hall provides municipal zoning and building regulations47.

Building a home in Calhoun County: the steps, in order

  1. Identify whether the parcel is unincorporated or inside a city: Point Comfort administers zoning, Seadrift has municipal zoning provisions, and Port Lavaca requires occupancy approval for specified uses4725. Septic applications remain with Victoria County Public Health5.
  2. For unincorporated land, ask the Floodplain Office whether county development or subdivision approval applies, because county development matters go through that office or the Commissioners Court18. Check the flood map and apply through Calhoun County Floodplain Administration for development in a special flood-hazard area171. In AE or VE zones, submit the required elevation materials before work, obtain any required Port O'Connor pre-construction inspection, and do not make final utility connections before floodplain approval26.
  3. Order a septic site evaluation early, because only 6.1% of county soils avoid severe limitations for a conventional drain field, then submit required OSSF materials through Victoria County Public Health141923.
  4. Give the groundwater district written notice before drilling a well; a drilling permit is not required, although production-permit rules may still apply27.
  5. Obtain a culvert permit from the precinct commissioner when required for county access; the permit has no additional charge28. A state-highway driveway requires TxDOT's permit29.

What to check before you buy land in Calhoun County

Start with jurisdiction: Calhoun County and its cities use separate development processes, with municipal zoning provisions in Seadrift and city-administered zoning in Point Comfort3074. Check flood maps before choosing a homesite because development in special flood-hazard areas requires a county permit, and VE zones prohibit mobile and manufactured homes110. Test the proposed septic area before committing to a layout; only 6.1% of county soils avoid severe limitations for a conventional drain field14. Confirm legal access, ask the precinct commissioner whether a culvert permit applies, and determine whether a planned land division triggers subdivision regulations2821. For a well, investigate production rules even though drilling requires notice rather than a permit27.

Watch-outs

  • Calhoun County's authorized-agent septic program is administered through Victoria County Public Health Department, including application review and inspections192320.
  • Point Comfort's zoning districts and Seadrift's municipal zoning provisions concern city land; unincorporated buyers should focus on county development, subdivision and floodplain approvals4718.
  • In AE or VE zones, the county requires elevation documentation before work and a finished-construction elevation certificate after construction; Port O'Connor also requires a pre-construction inspection from the Improvement District26.
  • In VE flood zones, manufactured and mobile homes are prohibited under Calhoun County's Flood Damage Prevention Order, regardless of the absence of county zoning106.

Sources

  1. Flood Damage Prevention Order, quoted and re-checked
  2. Application for Development Permit 2024, quoted and re-checked
  3. Texas law on county zoning and building authority
  4. Point Comfort: Sec. 38-56. Division into districts and categories; plat; vacation of streets or alleys (Calhoun County), quoted and re-checked
  5. Environmental Sewage Services, quoted and re-checked
  6. Calhoun County TX - Services (2026 county census)
  7. City Hall | Seadrift, TX, quoted and re-checked
  8. Environmental Sewage Services (2026 county census)
  9. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  10. Application for Development Permit 2024, quoted and re-checked
  11. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  12. Water Well Drilling and Plugging, quoted and re-checked
  13. Application for Development Permit 2024, quoted and re-checked
  14. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  15. 2025–2030 Calhoun County Multi-Jurisdictional Hazard Mitigation Plan, quoted and re-checked
  16. 2025-2030 Calhoun County Multi-Jurisdictional Hazard Mitigation Plan, quoted and re-checked
  17. Calhoun County Floodplain Administration (calhouncotx.org)
  18. 2025-2030 Calhoun County Multi-Jurisdictional Hazard Mitigation Plan, quoted and re-checked
  19. Victoria County Public Health Department, Environmental Services (vcphd.org)
  20. Environmental Sewage Services, quoted and re-checked
  21. Subdivision Regulations Amended 12-13-07_signed, quoted and re-checked
  22. City of Point Comfort Minutes for Regular City Council Meeting, quoted and re-checked
  23. On-Site Sewage Facility, quoted and re-checked
  24. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  25. Certificate of Occupancy application, quoted and re-checked
  26. Flood Plain Administration - Calhoun County Texas, quoted and re-checked
  27. Water Well Drilling and Plugging, quoted and re-checked
  28. Application for Development Permit 2024, quoted and re-checked
  29. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  30. 2025-2030 Calhoun County Multi-Jurisdictional Hazard Mitigation Plan, quoted and re-checked

Written October 11, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

Like all 6 of its neighbors, Calhoun County has no countywide zoning.

RuleCalhoun CountyAransas CountyVictoria CountyRefugio CountyJackson CountyMatagorda CountyGoliad County
Building permitLimitedLimitedNot requiredLimitedLimitedRequiredNot required
County zoningNoNoNoNoNoNoNo
Septic permitsVictoria County Public Health Dept.County Dept. of Env. HealthCounty Public Health Dept.Refugio CountyCounty Office of Permitting & InspectionCounty Env. Health Dept.County Env. Services Dept.

County locator

Calhoun County in Texas

48
County map
Calhoun County highlighted among the Texas counties · colored by Index score

How Calhoun County scores

Seclusion78100% ev.
Self-Sufficiency1692% ev.
Admin Boringness86100% ev.
Durability41100% ev.
Property Autonomy71100% ev.
Carry Cost81100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$210kTypical home
1.4%Property tax
$3,345Land / acre
39.4"Annual rain
16.9% of yrsSevere drought
7.8 / yr (+6.6)Mid-century 100°F days
21.6 daysMid-century dry spell
2.98" (+4.7%)Mid-century 1-day rain
1.38×Wildfire change factor
100%Forward climate coverage
$1,632Home insurance / yr
-2.9% / yrInsurance growth
0%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
146,097People within 2 hr
15,128Radius comparison (15 mi)
38.9People / sq mi
23.1%Federal land
100%Land at 15% slope or less
6.1%Soils rated "not limited" for septic (strict USDA rating)
10,041 acWorkable land screen
5.7%Wooded land
4.2 tonsBiomass / forest ac
71.2°FAvg temp

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Cities and towns in Calhoun County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Port Lavaca · Seadrift

Answers from the rulebook for Calhoun County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Calhoun County rules

  • Building permitLimited

    Development and construction subject to Calhoun County's Flood Damage Prevention Order, including structures in regulated flood-hazard areas in unincorporated Calhoun County.

    • The official county application is a floodplain development permit, not evidence of a general countywide residential building permit requirement.
    • For AE and VE flood zones, the application requires additional elevation, anchoring, flood-resistant construction, and certification requirements.
    • Final utility connections may not be made until the Floodplain Administrator approves the building or structure for compliance with the Flood Damage Prevention Order.
    • Permits expire six months from issuance.
    • The application states that the permit fee is $60, payable by cash or check.

    permit expiration: 6 months · permit fee: 60 USD (Cash or check; the form states that credit and debit cards are not accepted.)

    “If property is located in Floodzone AE or VE, a survey showing the natural ground elevation must be attached to application before it can be processed.”
    One more reviewed finding on this topic
    • Limited — Development, including construction or alteration of structures, in areas of special flood hazard within Calhoun County's jurisdiction.
      “The order shall apply to all areas of special flood hazard with the jurisdiction of Calhoun County. [...] A Floodplain Development Permit shall be required to ensure conformance with the provisions of this order.”
  • Building code adoptedPartial

    Building and development regulation administered by Calhoun County, especially county development matters handled through the Commissioner’s Court or Floodplain Office.

    • The official plan does not identify a single comprehensive countywide building-code adoption.
    • The county administers subdivision regulations and development permits through the Floodplain Office.
    • Calhoun County has adopted policies addressing Substantial Improvement and Substantial Damage determinations.
    • Floodplain, subdivision, and development-permit requirements may apply depending on the project and location.
    “REGULATIONS FOR BUILIDING IN FLOODZONES AE & VE”
    2 more reviewed findings on this topic
    • Partial — Calhoun County policies addressing flood-related Substantial Improvement and Substantial Damage determinations used for permitting purposes.
      “Calhoun County, Port Lavaca, and Point Comfort have all adopted policies that define and discuss determinations of Substantial Improvement (SI) and Substantial Damage (DI).”
    • Partial — Floodplain development and related permitting in unincorporated Calhoun County; this claim does not establish adoption of a comprehensive countywide building code.
      “In all areas of special flood hazards the following provisions are required for all new construction and substantial improvements:”
  • Local zoningVaries (with conditions)

    The countywide aggregate of local zoning authority in Calhoun County, including incorporated municipalities and unincorporated county areas.

    • The result aggregates different authorities and does not mean Calhoun County administers municipal zoning ordinances.
    • The official county hazard-mitigation plan states that Calhoun County development matters are addressed through the Commissioner's Court or Floodplain Office, while cities such as Seadrift use their own city processes.
    • Specific zoning districts and land-use provisions for incorporated municipalities must be checked in the applicable municipal ordinances.
    • The reviewed official sources did not establish that the county itself has a general zoning ordinance for unincorporated areas.
    “Each jurisdiction has its own processes for discussing land use development and adopting new building codes, ordinances, or regulations. In Calhoun County, for instance, all development matters are addressed either through the Commissioner’s Court or the Floodplain Office. This includes subdivision regulations and development permits, which are issued by the Floodplain Office. Port Lavaca's authorities, policies, programs, and resources are improved and expanded through actions taken by the City Council. Similarly, the cities of Seadrift and Point Comfort employ a comparable method for discussion and adoption as Port Lavaca.”
    2 more reviewed findings on this topic
    • Varies (with conditions) — Local zoning and land-use controls across Calhoun County, aggregated across county-administered unincorporated areas and incorporated municipalities.
      “Each jurisdiction has its own processes for discussing land use development and adopting new building codes, ordinances, or regulations. In Calhoun County, for instance, all development matters are addressed either through the Commissioner’s Court or the Floodplain Office. This includes subdivision regulations and development permits, which are issued by the Floodplain Office.”
    • Varies (with conditions) — Aggregate local land-use regulation across Calhoun County: the county handles its own development matters through the Commissioner’s Court or Floodplain Office, while incorporated cities use their own city-council processes and ordinances. This is an aggregate conclusion and does not claim that Calhoun County administers municipal zoning.
      “Each jurisdiction has its own processes for discussing land use development and adopting new building codes, ordinances, or regulations. In Calhoun County, for instance, all development matters are addressed either through the Commissioner’s Court or the Floodplain Office. This includes subdivision regulations and development permits, which are issued by the Floodplain Office. Port Lavaca's authorities, policies, programs, and resources are improved and expanded through actions taken by the City Council. Similarly, the cities of Seadrift and Point Comfort employ a comparable method for discussion and adoption as Port Lavaca.”
  • Zoning districts · by state lawNo county rule

    Unincorporated Calhoun County: no county rule sets this, because Calhoun County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing calhouncotx.org.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Minimum dwelling size · by state lawNo county rule

    Unincorporated Calhoun County: no county rule sets this, because Calhoun County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing calhouncotx.org.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Minimum lot size · by state lawNo county rule

    Unincorporated Calhoun County: no county rule sets this, because Calhoun County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing calhouncotx.org.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Setbacks · by state lawNo county rule

    Unincorporated Calhoun County: no county rule sets this, because Calhoun County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing calhouncotx.org.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Lot coverage · by state lawNo county rule

    Unincorporated Calhoun County: no county rule sets this, because Calhoun County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing calhouncotx.org.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Building height · by state lawNo county rule

    Unincorporated Calhoun County: no county rule sets this, because Calhoun County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing calhouncotx.org.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Living in an RV · by state lawNo county rule

    Unincorporated Calhoun County: no county rule sets this, because Calhoun County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing calhouncotx.org.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Camping on your land · by state lawNo county rule

    Unincorporated Calhoun County: no county rule sets this, because Calhoun County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing calhouncotx.org.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Tiny homes · by state lawNo county rule

    Unincorporated Calhoun County: no county rule sets this, because Calhoun County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing calhouncotx.org.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Manufactured homes · by state lawNo county rule

    Unincorporated Calhoun County: no county rule sets this, because Calhoun County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing calhouncotx.org.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Accessory dwellings · by state lawNo county rule

    Unincorporated Calhoun County: no county rule sets this, because Calhoun County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing calhouncotx.org.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Who permits septicMixed (with conditions)

    On-site sewage facilities in Calhoun County, including permitting and inspection administration.

    • Calhoun County is identified as a TCEQ authorized agent county.
    • The Victoria County Public Health Department Environmental Services Division administers the program under an agreement with the authorized agents.
    • The program implements and enforces Texas Health and Safety Code Chapter 366 and 30 TAC Chapter 285.
    “Victoria, Calhoun, and Dewitt counties are authorized agents of the Texas Commission on Environmental Quality (TCEQ). The authorized agent is responsible for implementing and enforcing the rules adopted under the Texas Health and Safety Code - Chapter 366. To fulfill this responsibility, the authorized agents have established an agreement with the Victoria County Public Health Department Environmental Services Division.”
    One more reviewed finding on this topic
    • Local — OSSF administration in Calhoun County through the county's TCEQ-authorized-agent arrangement with Victoria County Public Health Department Environmental Services Division.
      “Victoria, Calhoun, and Dewitt counties are authorized agents of the Texas Commission on Environmental Quality(TCEQ).”
  • Septic inspectionLimited

    OSSF permit applications, site evaluations, planning materials, and OSSF construction or compliance inspections administered for Calhoun County through the Victoria County Public Health Department Environmental Services Division.

    • The source identifies inspection as part of the authorized-agent program but does not state that every existing OSSF receives a periodic inspection.
    • For systems using secondary treatment or drip irrigation, TCEQ states that inspection by a valid maintenance company is required once every four months, or the system may be maintained by the single-family homeowner where allowed.

    inspection interval for secondary-treatment or drip-irrigation systems: 4 months (or maintained by the single-family homeowner, where allowed)

    “These licensed individuals review permit applications, site evaluations, planning materials, and conducts inspections on OSSF's.”
  • Well permitNot required

    Drilling a water well within Calhoun County.

    • A written notice of intent to drill must be provided to the Calhoun County Groundwater Conservation District before drilling begins.
    • The absence of a drilling permit does not eliminate possible groundwater production-permit requirements.
    “Drilling permits are no longer required to drill water wells within Calhoun County. However, any person drilling a water well within Calhoun County must provide the district with written notice of intent to drill a well before the start of drilling activities.”
    One more reviewed finding on this topic
    • Not required — Drilling a water well within Calhoun County, within the Calhoun County Groundwater Conservation District.
      “Drilling permits are no longer required to drill water wells within Calhoun County.”
  • Subdividing landRegulated (with conditions)

    Division of land outside the jurisdiction of any incorporated town or city in Calhoun County into two or more parts for sale, rental, lease, or building development intended for residential or commercial use, including subdivision into lots for rental purposes such as mobile home parks and similar land uses.

    • The regulations do not apply to testamentary land divisions.
    • The regulations do not apply to dividing land among family members.
    • The regulations do not apply to divisions resulting from dissolution of a corporation or partnership.
    • The regulations do not apply within the jurisdiction of an incorporated town or city.
    • The county subdivision regulations were identified as amended December 13, 2007.
    “situated outside of the jurisdiction of any incorporated town or city in Calhoun County, Texas, [...] divide the same into two (2) or more parts”
  • Driveway accessRequired

    Development applicants using the Calhoun County subdivision-regulation process where a culvert is required for access.

    • A culvert permit must be obtained from the Commissioner in the applicant's precinct.
    • The application states that the culvert permit has no additional charge.
    • The application refers applicants to the Subdivision Regulations.

    culvert permit fee: 0 USD (The application states no additional charge.)

    “I have received a copy of the Subdivision Regulations and am also aware that I must obtain a culvert permit from the Commissioner in my Precinct at no additional charge. The Subdivision Regulations can be found at the website listed above.”
  • Building in a floodplainLimited

    Development governed by the Calhoun County Flood Damage Prevention Order, with additional documented requirements for Floodzones AE and VE.

    • In Floodzones AE and VE, structural components must be anchored against flotation, collapse, or permanent lateral movement.
    • In Floodzones AE and VE, machinery and equipment servicing the building must be elevated to or above the Base Flood Elevation.
    • Human-habitation spaces must be elevated to or above the Base Flood Elevation.
    • In AE zones, the lowest floor must be elevated to or above the Base Flood Elevation.
    • In VE zones, mobile or manufactured homes are not allowed; fill may not be used for structural support; and no construction is allowed seaward of the mean high tide line.
    • Fences in VE and adjacent AE zones must be permitted and comply with the listed height, spacing, strand, and opening conditions.
    • The application requires additional surveys and elevation certificates in Floodzones AE and VE.

    finished elevation certificate deadline: 60 days after construction (Floodzones AE and VE.) · maximum fence height in VE and adjacent AE zones: <= 5 feet (The application also states additional strand and spacing requirements.)

    “Mobile or Manufactured homes are not allowed in VE zones.”
  • Permit feesPublished (with conditions)

    The Calhoun County Floodplain Administration development-permit application.

    • The application lists a permit amount of $60.
    • Payments must be made by check or money order payable to Calhoun County, or by exact cash.
    • Credit and debit cards are not accepted.
    • All permits expire six months from the date of issuance.

    permit amount: 60 USD (The form's office-use section states the amount.)

    “All permits expire 6 months from date of issuance. Check or money orders are to be made payable to: Calhoun County We do NOT accept credit or debit cards. Cash must be exact as we do not have change. Plans are preferred to be submitted electronically. If not electronic, cannot be larger than 8 ½” x 11””
  • Permit processPublished (with conditions)

    Development subject to the Calhoun County Flood Damage Prevention Order, including development in identified flood hazard areas.

    • The application requires owner/applicant, contractor, site, use, work-class, foundation, roof, water/sewage, work-description, flood-zone, elevation, project-cost, and plan-submission information.
    • For Floodzone AE or VE, a natural-ground-elevation survey must be attached before processing.
    • After construction in Floodzone AE or VE, a Finished Construction Elevation Certificate must be filed with the Floodplain office within 60 days.
    • For proposed development in Floodzones AE or VE, an elevation certificate by a certified engineer or licensed surveyor must be submitted before initiation.
    • Final utility connections cannot be made until the Floodplain Administrator approves compliance.
    • Port O'Connor residents need a pre-construction inspection from the Improvement District before development can begin.
    • Failure to comply can result in fines and penalties and make the application null and void.

    Finished Construction Elevation Certificate deadline: 60 days after construction (Applies when property is in Floodzone AE or VE.) · permit expiration: 6 months from issuance

    “All permits expire 6 months from date of issuance.”
  • County-wide zoningAbsent

    Texas counties lack general zoning authority in unincorporated areas; Calhoun County's official services list only floodplain development permits and no zoning ordinance.

    Calhoun County TX - Services ↗Scouted from the county site, not yet independently re-checked

Texas rules that apply here

  • Owner-builder exemptionConditional

    An owner installing an on-site sewage facility for the owner's own single-family dwelling in Calhoun County, subject to the applicable local permitting authority's requirements.

    • The permitting authority must allow owner installation under its local requirements; otherwise the state page says the owner may install the system if the listed conditions are met.
    • The OSSF must serve a single-family dwelling that the owner owns.
    • The owner must also own the property.
    • No part of the property may be developed for sale or lease.
    • All permitting, construction, and maintenance requirements of the permitting authority must be met.
    • Some systems may not be purchasable by a homeowner because they must be installed by a factory representative.
    • If another person assists with any phase, that person must be a licensed installer of the correct level, except for a licensed electrician installing electrical components or a person delivering and setting treatment or pump tanks into an excavation.
    “This depends on whether the permitting authority allows this in their local requirements. Otherwise yes, provided you have the knowledge, skills, and equipment to do so AND: the OSSF is for a single family dwelling that you own, you also own the property, no part of the property will be developed for sale or lease, all permitting, construction, and maintenance requirements of the permitting authority are met.”
    2 more reviewed findings on this topic
    • Conditional — An owner performing electrical, plumbing, or air-conditioning and refrigeration work on the owner's own residence or homestead in Texas.
      “A person who perform electrical work on a dwelling that they own and reside in is not required by the state to be licensed as electricians.”
    • Conditional — Electrical work on a dwelling owned and occupied by the property owner in Texas.
      “A person who perform electrical work on a dwelling that they own and reside in is not required by the state to be licensed”
  • Septic permitRequired

    Construction, installation, alteration, extension, repair, and operation of OSSFs in Texas, subject to stated exemptions and local requirements.

    • A permit and approved plan are required for construction, alteration, repair, extension, and operation of an OSSF.
    • A permit is generally required to construct, install, alter, extend, or repair an OSSF.
    • A local permitting authority must be checked because local programs may be more stringent than state minimums.
    • The 10-acre exemption requires compliance with 30 TAC Chapter 285 planning, construction, and installation standards; a site evaluation by a TCEQ-licensed site evaluator or professional engineer; service to a single-family dwelling on a tract of at least 10 acres; no nuisance or groundwater pollution; all OSSF parts at least 100 feet from the property line; on-site effluent disposal; and the single-family dwelling must be the only dwelling on the tract.
    • Emergency repairs listed by TCEQ do not require a permit but must be reported to the permitting authority in writing within 72 hours after repairs begin.
    • Grandfathered systems may be exempt if installed before the local program was authorized or before September 1, 1989, whichever is earlier, and if they are not creating a nuisance, are not in need of repair, and have had no significant increase in use or other alteration.
    • The permitting authority must approve or deny planning materials and the permit application within 30 days of receipt.

    minimum tract size for 10-acre exemption: >= 10 acres (single-family dwelling and all other stated conditions must be met) · minimum OSSF setback under 10-acre exemption: >= 100 feet from property line (all parts of the OSSF) · emergency repair reporting deadline: <= 72 hours (after repairs have begun) · permit application decision deadline: <= 30 days (from receipt by permitting authority)

    “A permit and approved plan are required to construct, alter, repair, extend, and operate an OSSF.”
    2 more reviewed findings on this topic
    • Required — Construction, alteration, repair, extension, or operation of an OSSF, including septic systems, in Texas and therefore Calhoun County unless an applicable exception applies.
      “A permit and approved plan are required to construct, alter, repair, extend, and operate an OSSF.”
    • Required — Construction, installation, alteration, extension, or repair of an OSSF in Texas
      “A permit is required to construct, install, alter, extend, or repair an OSSF. [...] An OSSF may be exempt from permitting if it complies with all other requirements, including planning, construction, and installation standards of 30 TAC 285 AND meets the “10 acre rule”:”
  • Off-grid sanitationLimited

    Off-grid wastewater sanitation through an OSSF in Texas.

    • An OSSF generally requires a permit and approved plan before construction, installation, alteration, extension, repair, or operation.
    • A qualifying single-family dwelling on a tract of at least 10 acres may use the 10-acre permitting exemption only if every stated site-evaluation, setback, nuisance, groundwater, on-site disposal, and single-dwelling condition is met.
    • Local permitting authorities may impose requirements more stringent than state minimums.
    • Emergency repairs are exempt from permitting only for the listed repair types and must be reported in writing within 72 hours after repairs begin.

    10-acre exemption tract size: >= 10 acres (all TCEQ conditions must be satisfied) · 10-acre exemption OSSF setback: >= 100 feet from property line (all parts of the OSSF)

    “An OSSF may be exempt from permitting if it complies with all other requirements, including planning, construction, and installation standards of 30 TAC 285 AND meets the “10 acre rule”:”
    2 more reviewed findings on this topic
    • Limited — Off-grid domestic sewage disposal through an OSSF or septic system serving property in Calhoun County.
      “Permits are required for on-site sewage facilities (OSSFs) including septic systems and holding tanks.”
    • Limited — Composting toilets used as on-site sewage facility treatment systems in Texas.
      “Composting toilets will be approved by the executive director provided the system has been tested and certified under NSF International Standard 41 (1999) or under any other standards approved by the executive director.”
  • county zoning authorityLimited

    Texas counties adopting zoning regulations for specified unincorporated or otherwise specially defined areas.

    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    • Other Chapter 231 subchapters address special areas including the Amistad Recreation Area in Val Verde County, military zones, certain lakes, the El Paso Mission Trail Historical Area, Lake Somerville, and Falcon Lake in Zapata County.
    • The cited statute was enacted effective September 1, 1987; the Falcon Lake subchapter was added effective June 15, 2007, and amended effective September 1, 2009.

    Padre Island distance from publicly owned park or recreational development: <= 2 miles (Area must be outside a municipality and in Cameron or Willacy County.) · Padre Island distance from beach, wharf, or bathhouse: <= 2 miles (The beach, wharf, or bathhouse must be used by at least 500 persons annually.)

    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
    One more reviewed finding on this topic
    • Limited — County zoning authority over unincorporated land in Texas, where a specific statutory grant applies.
      “As you suggest, a county has very limited and specific zoning authority, and none that may be used to regulate construction or operation of the proposed facility.”
  • county building authorityLimited

    Texas counties adopting and enforcing fire-code building permits for specified buildings in unincorporated areas and applying residential building-code standards in certain counties.

    • Under Section 233.061, the county must have a population over 250,000 or be adjacent to a county with a population over 250,000.
    • Under Section 233.062, the fire code applies only to commercial establishments, public buildings, and multifamily residential dwellings consisting of four or more units constructed in an unincorporated area.
    • The fire code does not apply to an industrial facility having a fire brigade that conforms to Occupational Health and Safety Administration requirements.
    • A covered applicant must submit a plan and a commissioners-court-set application fee; the county must issue or deny the permit within 30 days, and failure to act within 30 days approves the construction for purposes of the subchapter.
    • The fire code must conform to the International Fire Code or Uniform Fire Code as those codes existed on May 1, 2005, or establish protective measures exceeding those standards; later editions may be adopted.
    • Residential standards under Section 233.152 apply only if the county adopts a resolution or order and the county is within 50 miles of an international border or has a population over 100.
    • Those residential standards apply only to new single-family-house or duplex construction beginning after September 1, 2009; manufactured or modular structures governed by Occupations Code Chapters 1201 or 1202 are excluded from the definition of new residential construction.
    • A municipality's building code controls in its extraterritorial jurisdiction, and Section 233.152 does not authorize county prior approval of new residential construction or county zoning regulations.
    • Fire-code inspection and permit fees may be charged under a fee schedule based on building type, limited to amounts necessary to administer and enforce the subchapter; inspection fees must be reasonable and reflect approximate inspection costs.

    county population threshold for fire-code authority: > 250000 persons (A county adjacent to a county over 250,000 also qualifies.) · multifamily residential dwelling threshold: >= 4 units (The fire code applies only to covered buildings constructed in an unincorporated area.) · residential-code border distance: <= 50 miles (Alternative qualification is county population over 100.) · application decision period: 30 days (If the commissioners court does not issue or deny the permit within 30 days after receiving the application and fee, construction is approved for purposes of the subchapter.) · residential standards effective construction date: > 2009-09-01 (Applies only to new residential construction that begins after September 1, 2009.)

    “The commissioners court of a county with a population of over 250,000 or a county adjacent to a county with a population of over 250,000 may adopt a fire code and rules necessary to administer and enforce the fire code. [...] The fire code applies only to the following buildings constructed in an unincorporated area of the county: (1) a commercial establishment; (2) a public building; and (3) a multifamily residential dwelling consisting of four or more units.”
    One more reviewed finding on this topic
    • Limited — County fire-code adoption and building-permit authority for specified buildings in unincorporated areas of qualifying Texas counties, including multifamily residential dwellings of four or more units.
      “The commissioners court of a county with a population of over 250,000 or a county adjacent to a county with a population of over 250,000 may adopt a fire code and rules necessary to administer and enforce the fire code.”

Inside cities and towns in Calhoun County

Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.

  • Building permitRequired

    Construction, enlargement, alteration, repair, moving, demolition, or occupancy change involving a building, structure, or electrical, gas, mechanical, or plumbing system within the City of Port Lavaca, Calhoun County.

    • The owner or authorized agent must apply to the building official and obtain the required permit before the work.
    • The official page lists exemptions including certain retaining walls under 4 feet, water tanks under 5,000 gallons subject to the stated ratio, certain above-ground pools, playground equipment, specified awnings, and other listed work.
    • Emergency equipment replacements and repairs require the permit application by the next working business day.
    “Any owner or authorized agent who intends to construct, enlarge, alter, repair, move, demolish, or change the occupancy of a building or structure, or any electrical, gas, mechanical, or plumbing system, or to cause any such work to be done, shall first make application to the building official and obtain the required permit.”
  • Building code adoptedPartial

    Building-code reference and flood-related code policy in the incorporated City of Seadrift.

    • The official plan describes the 2006 International Residential Code as a reference manual, not necessarily as a formally adopted comprehensive building code.
    • The plan states that Seadrift planned to discuss adoption of a more recent manual or establish a policy concerning Substantial Improvement/Substantial Damage for NFIP compliance.

    referenced building code: 2006 International Residential Code (IRC) (Described as a reference manual)

    “The City of Seadrift currently uses the 2006 International Residential Code (IRC) as a reference manual.”
  • InspectionsLimited

    Development and construction within the City of Port Lavaca.

    • The City Building Department administers and enforces applicable local ordinances and state regulations.
    • The department provides oversight of permitting, plan review, inspections, and code compliance.
    • Plan review and inspections are provided by Bureau Veritas North America Incorporated.
    “The Building Department provides oversight of permitting, plan review, inspections, code compliance to ensure that all development within the City meets established standards.”
  • Certificate of occupancyLimited

    New, altered, or changed uses, and modular, manufactured, or tiny homes, within the City of Port Lavaca.

    • Failure to obtain a certificate of occupancy for a new, altered, or changed use is stated to violate the City of Port Lavaca Code of Ordinances.
    • For modular, manufactured, or tiny homes, a certificate of occupancy is required before any occupancy or change of occupancy.
    • For the modular/manufactured/tiny-home permit, a state installers report is required before release of utilities, and separate mechanical, electrical, and plumbing permits are required.
    • The certificate may be revoked for lack of permission to occupy, violation of relevant city codes, or operation outside the described uses.
    “I understand that failure to obtain a Certificate of Occupancy for a new, altered, or changed use is in violation of the City of Port Lavaca Code of Ordinances..”
  • Local zoningPresent (with conditions)

    Zoning and related land-use controls within the incorporated City of Seadrift, Calhoun County, Texas.

    • The City of Seadrift identifies its ordinances and municipal code as covering zoning.
    • The City's ordinance index separately lists a Building Code Land Use and Control Ordinance and a Planning Commission Ordinance.
    • The reviewed official pages did not expose the specific zoning districts, dimensional standards, or current land-use tables; those provisions require review of the linked ordinances or a public-records request.
    “This page provides access to the City's ordinances and municipal code, covering topics such as zoning, building regulations, public safety, utilities, animal control, and other matters affecting residents and businesses.”
    2 more reviewed findings on this topic
    • Present (with conditions) — Zoning-related municipal ordinances and municipal-code provisions within the incorporated City of Seadrift, Texas.
      “City ordinances are local laws adopted by the Seadrift City Council to protect the health, safety, and welfare of the community. This page provides access to the City's ordinances and municipal code, covering topics such as zoning, building regulations, public safety, utilities, animal control, and other matters affecting residents and businesses.”
    • Present (with conditions) — Zoning-change review within the incorporated City of Point Comfort, Texas.
      “A motion was made by Councilwoman Kurtz and Seconded by Councilman Hernandez to approve the denial of the Zoning Commission to deny zoning change requested by Russell Cain on behalf of Church of Christ of Point Comfort located at the intersection of Hamilton and Lamar Streets until such time as needed as shown by contract on property. The motion was passed and approved by unanimous vote.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Mandatory utility hookup — Mandatory connection to public water or sewer service for property in Calhoun County.
  • Agricultural exemption — Agricultural groundwater production wells in the Calhoun County Groundwater Conservation District.
  • Short-term rentals — Short-term rental use in Calhoun County.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Calhoun County, Texas

Is Calhoun County a good place to live off-grid or homestead?

Calhoun County scores 48/100 on the Bolthole Index, a solid county profile. Its strengths: low administrative friction for a quiet rural property and manageable long-term carry cost. Watch-outs: workable self-sufficiency basics (39.4″/yr rainfall) and elevated current hazard exposure.

Do you need a building permit in Calhoun County, Texas?

Calhoun County requires a building permit only in limited cases (such as floodplains or specific zones), and it has no county-wide zoning. Onsite septic is permitted by Victoria County Public Health Department, Environmental Services (TCEQ Authorized Agent for Calhoun County). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

Can you live in an RV or tiny home on your land in Calhoun County?

Living in an RV on your own land in Calhoun County is allowed: Unincorporated Calhoun County: no county rule sets this, because Calhoun County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). The county legal census found no county zoning ordinance, citing calhouncotx.org. Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits. Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters. A tiny home is allowed. Confirm with the county before relying on it.

How much does land cost in Calhoun County, Texas?

Land in Calhoun County runs about $3,345 per acre, based on the latest county data.

What is the water situation in Calhoun County?

Calhoun County gets about 39.4" of rain a year, with severe drought in roughly 16.9% of years.

How remote is Calhoun County?

A typical private-land location has about 15,128 people within 15 miles and 1,175,222 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Calhoun compares in Texas

Compare side-by-side →See all 254 Texas counties ranked →