Bolthole Index

Willacy County, Texas

Building permits, zoning and septic rules in Willacy County, Texas

43Index Score / 100
#179 of 254 in Texas

Unincorporated Willacy County, Texas has no zoning ordinance, so the county sets no minimum lot size, setback or use restriction through zoning12. Building permits come from the Willacy County Permits Department, which will not issue one until the lot has a recorded plat3. Septic permits are separate and also come from the Permits Department, as the state's local authorized agent45.

At a glance

Building permit
Required through the county Permits Department; a recorded plat must come first3
Zoning
None at the county level; no zoning-based lot size, setback or use rule12
Septic permit
Separate permit from the county Permits Department, which acts for the state45
RV, tiny home or manufactured home
No zoning-based occupancy limit; a manufactured home still needs a county permit26
Residential permit fee
$0.18 per square foot plus a $5 processing fee7
Owner-builder
State licensing exemption for your own homestead's electrical and plumbing; county exemption unconfirmed8
Septic-favorable soils
About 36.7% of the county's land is rated free of severe limits for a conventional drain field9
Property tax
About 1.9% effective rate; median bill around $1,164/year1011

Who to call

Building permits

Willacy County Permits Department

Issues residential and commercial building permits, electrical, plumbing/gas and mechanical permits, manufactured-home and moving permits, demolition permits and underground/utility permits, and administers the county's Flood Plains Ordinance and Subdivision Rules and Regulations for unincorporated Willacy County

(956) 689-3393

576 W. Main Ave, Raymondville, Texas 78580

Septic permits

Willacy County Permits Department - On-Site Sewage Facility (OSSF) Program

Issues on-site sewage facility (OSSF) permits for new construction and system modification, as the Texas Commission on Environmental Quality's authorized agent for unincorporated Willacy County

(956) 689-3393

576 W. Main Ave, Raymondville, Texas 78580

Contact details are copied from each office’s official page and were checked against it on October 9, 2026.

Off-grid gear

Going off-grid in Willacy 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 Willacy County, Texas?

Yes: building permits in unincorporated Willacy County come from the county Permits Department, which accepts applications for residential and commercial construction, manufactured homes, electrical, plumbing/gas and mechanical work, and demolition6. The first hurdle is the plat: the county's checklist says a building permit application cannot be issued if the plat is not recorded3. Starting construction before approval doubles the approved application fee3. Residential new construction is priced at $0.18 per square foot, with a $5 processing fee and a 25 percent plan review fee on top of the permit fee7. We could not confirm which building-code edition the county enforces, so ask the Permits Department what your plans will be reviewed against6.

Who issues building permits in Willacy County, and how do you reach them?

The Willacy County Permits Department issues building, electrical, plumbing/gas, mechanical, demolition, manufactured-home and moving permits, and is reached at (956) 689-3393 at 576 W. Main Ave, Raymondville, Texas 785806. Applications are posted on the county site as downloadable forms, and permits are submitted to the Tax Office Monday through Friday, 8:00am to 11:30am and 1:00pm to 4:00pm612. Permit fees are cash or check only6. The initial checklist asks for a recorded plat, a completed application, a deed and a tax statement12. Septic permits come from the same office13.

Does Willacy County have zoning?

Unincorporated Willacy County has no county zoning ordinance: the county's Permits page lists a Flood Plains Ordinance and Subdivision Rules and Regulations but no zoning code16. With no zoning, the county sets no minimum lot size, setback, lot-coverage or height limit through zoning, and none restricts an accessory dwelling, RV, tiny home or manufactured home2. That does not mean no setbacks at all: the residential permit application says no construction is allowed over an easement, and building setbacks must be met before the foundation is poured14. Cities such as Raymondville may have their own rules inside city limits, so ask city hall if your parcel is inside one; the county's rules above cover unincorporated land only.

How do septic permits work in Willacy County?

Septic permits in Willacy County are separate from building permits: the residential building application says a separate permit is required for septic tank installation4. The Permits Department handles them as the state's local authorized agent for on-site sewage facilities135. The application asks for site, soil, water-supply and design information, including suitable soil at least 24 inches deep beneath the drain field and at least 2 borings or backhoe pits at opposite ends of the absorption area4. After installation, a permit to operate is granted following successful inspection15. The local agent sets the permit and inspection fees, plus a $10 state fee per permit; we could not confirm the county's fee amount, so ask the Permits Department16. Texas exempts a single-family home on at least 10 acres only if every listed condition is met, including keeping all parts of the system at least 100 feet from the property line17. About 36.7% of the county's land is rated free of severe limits for a conventional drain field9.

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

Unincorporated Willacy County has no zoning ordinance, so no county zoning rule limits living in an RV, a tiny home or a manufactured home on private land2. A manufactured home still needs a county manufactured-home permit, with a $150 permit fee67. Any home that needs sewage disposal needs a septic permit whatever type of dwelling it is4. In a flood zone, the county requires a floodplain development permit and elevation documentation3. We could not confirm a county rule on short-term rentals; ask the Permits Department.

Building a home in Willacy County: what are the steps?

  1. Confirm the lot has a recorded plat and check whether it is in a flood zone, because a building permit cannot be issued without the plat and flood-zone projects need a floodplain development permit3.
  2. Apply for the septic permit through the Permits Department if no sewer serves the lot4.
  3. Submit the residential building application, plus electrical, plumbing/gas and mechanical applications as needed, to the Permits Department at 576 W. Main Ave, Raymondville, (956) 689-33936.
  4. Pay the permit fees in cash or by check6.
  5. Do not start work before approval, because that doubles the approved application fee3.
  6. Contact the Inspection Department 48 hours before the foundation pour so setbacks and finished floor elevation can be checked14.
  7. If a driveway meets a state highway, submit TxDOT Form 1058 and wait for the executed permit18; a county driveway fee of $45 appears on the county fee schedule19.

What should you check before buying land in Willacy County, Texas?

Willacy County has about 20,037 residents at roughly 33.9 people per square mile, and the nearest city of 100,000 or more is about 35 miles away202122. Land is flat, with all of it at 15% slope or less23. Rainfall averages about 25.3 inches a year, with severe drought in roughly 20.2% of years, so plan your water supply; we could not confirm a county well-permit rule, so ask the Permits Department2425. Federal land covers about 11.9% of the county, so check whether a parcel borders it26. Farmland has recently valued around $2,789 an acre and a typical home around $174,196, against a roughly 1.9% effective property tax rate272810. Typical home insurance runs about $2,219 a year29.

Watch-outs

  • A building permit cannot be issued in Willacy County until the plat is recorded, so confirm a parcel's plat status before you close3.
  • Starting construction before the county approves your application doubles the approved application fee3.
  • We could not confirm which building code the county enforces or any owner-builder exemption from county permits; ask the Permits Department before assuming either8.

Sources

  1. Willacy County Permits Department (2026 county census)
  2. Texas law on county zoning and building authority
  3. Checklist for Initial Application Residential / Commercial, quoted and re-checked
  4. Residential Building Permit Application, quoted and re-checked
  5. Application for On-Site Sewage Facility New Construction and Modification, quoted and re-checked
  6. Willacy County Permits Department (co.willacy.tx.us)
  7. Residential Building Permit Application, quoted and re-checked
  8. Exemptions to Electrician Licensing (2026 county census)
  9. 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
  10. Effective property tax rate: Bolthole Index county data
  11. Median property tax bill: Bolthole Index county data
  12. Permits, quoted and re-checked
  13. Willacy County Permits Department - On-Site Sewage Facility (OSSF) Program (co.willacy.tx.us)
  14. Residential Building Permit Application, quoted and re-checked
  15. On-Site Sewage New Construction and Modification, quoted and re-checked
  16. On-Site Sewage Facility Rules Compilation, quoted and re-checked
  17. Getting a Permit for an OSSF - Such as a Septic System (Texas statewide rule), quoted and re-checked
  18. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  19. Residential Building Permit Application, quoted and re-checked
  20. County population: Bolthole Index county data
  21. Population density: Bolthole Index county data
  22. Straight-line distance from the county center to the nearest city of 100,000+ people: Bolthole Index county data
  23. Share of land at 15% slope or less: Bolthole Index county data
  24. Annual precipitation: Bolthole Index county data
  25. Share of years in severe drought: Bolthole Index county data
  26. Federal land share: Bolthole Index county data
  27. Farmland value per acre (USDA census): Bolthole Index county data
  28. Typical home value (Zillow): Bolthole Index county data
  29. Typical home insurance premium: Bolthole Index county data

Written October 9, 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

Unlike all 6 of its neighbors, Willacy County requires a building permit only in limited cases.

RuleWillacy CountyCameron CountyKenedy CountyHidalgo CountyBrooks CountyKleberg CountyStarr County
Building permitLimitedRequiredNot requiredRequiredNot requiredNot requiredNot required
County zoningNoNoNoNoNoNoNo
Septic permitsCounty Permits Dept.County Env. Health Dept.Kenedy CountyCounty Env. Health Div.Brooks CountyCity of Kingsville Env. HealthStarr County

County locator

Willacy County in Texas

43
County map
Willacy County highlighted among the Texas counties · colored by Index score

How Willacy County scores

Seclusion42100% ev.
Self-Sufficiency1896% ev.
Admin Boringness7190% ev.
Durability39100% ev.
Property Autonomy71100% ev.
Carry Cost82100% ev.

Evidence strength: 97%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$174kTypical home
1.9%Property tax
$2,789Land / acre
25.3"Annual rain
20.2% of yrsSevere drought
45.1 / yr (+34.2)Mid-century 100°F days
31.3 daysMid-century dry spell
1.97" (+2.3%)Mid-century 1-day rain
1.32×Wildfire change factor
100%Forward climate coverage
$2,219Home insurance / yr
-2% / yrInsurance growth
0%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
17,694Radius comparison (15 mi)
33.9People / sq mi
11.9%Federal land
100%Land at 15% slope or less
36.7%Soils rated "not limited" for septic (strict USDA rating)
114,914 acWorkable land screen
5.9%Wooded land
7 tonsBiomass / forest ac
74.5°FAvg temp

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Cities and towns in Willacy 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.

Lyford · Raymondville · San Perlita

Answers from the rulebook for Willacy County

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

Willacy County rules

  • Building permitLimited

    Residential and commercial construction and listed improvements handled through the Willacy County permit process.

    • A recorded plat is required; if the plat is not recorded, a building permit application cannot be issued.
    • A separate permit is required for plumbing and electrical work on commercial projects.
    • A separate septic permit is required for septic-tank installation.
    • Flood-zone projects require a floodplain development permit and elevation documentation.
    • The application states that beginning construction before approval doubles the approved application fee.

    permit processing fee: 5 USD

    “If plat is not recorded a building permit application cannot be issued”
    One more reviewed finding on this topic
    • Limited — County building-permit administration for residential, commercial, manufactured-home, demolition, moving, electrical, plumbing/gas, mechanical, and underground/utility work
      “Applications (Click link to download) ▲ 1. Checklist for Initial Application (Residential/Commercial) 2. Residential Building Permit Application 3. Commercial Building Permit Application”
  • InspectionsLimited

    Building-setback and finished-floor-elevation inspections during Willacy County construction permitting.

    • The applicant must contact the Inspection Department 48 hours before pouring the foundation.
    • No construction is allowed over an easement, and building setbacks and finished-floor elevation must be met before pouring the foundation or moving in a structure.
    • Flood-zone projects require elevation certificates and final construction-elevation confirmation.

    inspection notice before foundation pour: >= 48 hours

    “PLEASE CONTACT INSPECTION DEPARTMENT 48 HOURS PRIOR TO POURING OF FOUNDATION FOR INSPECTION OF BUILDING SETBACKS FROM PROPERTY LINES AND FINISH FLOOR ELEVATION. NO CONSTRUCTION ALLOWED OVER EASEMENT, BUILDING SETBACKS AND FINISH FLOOR ELEVATION SHALL BE MET PRIOR TO POURING FOUNDATION OR WHEN MOVING IN A STRUCTURE.”
  • Zoning districts · by state lawNo county rule

    Unincorporated Willacy County: no county rule sets this, because Willacy 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 co.willacy.tx.us.

    • 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 Willacy County: no county rule sets this, because Willacy 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 co.willacy.tx.us.

    • 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 Willacy County: no county rule sets this, because Willacy 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 co.willacy.tx.us.

    • 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 Willacy County: no county rule sets this, because Willacy 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 co.willacy.tx.us.

    • 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 Willacy County: no county rule sets this, because Willacy 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 co.willacy.tx.us.

    • 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 Willacy County: no county rule sets this, because Willacy 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 co.willacy.tx.us.

    • 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 Willacy County: no county rule sets this, because Willacy 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 co.willacy.tx.us.

    • 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 Willacy County: no county rule sets this, because Willacy 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 co.willacy.tx.us.

    • 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 Willacy County: no county rule sets this, because Willacy 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 co.willacy.tx.us.

    • 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 Willacy County: no county rule sets this, because Willacy 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 co.willacy.tx.us.

    • 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 Willacy County: no county rule sets this, because Willacy 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 co.willacy.tx.us.

    • 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 septicCounty

    On-site sewage facilities in Willacy County

    • The county application identifies a Willacy County designated representative and county approval process.
    • TCEQ rules and Texas Health and Safety Code requirements continue to govern the program.
    “Willacy Willacy County AA Adam Ramirez (956) 689-3393”
    One more reviewed finding on this topic
  • Septic permitRequired

    Installation or construction of an on-site sewage management system in Willacy County.

    • The residential building application separately requires a septic-tank installation permit.
    • The permit is tied to compliance with applicable OSSF legal requirements and 30 TAC Chapter 285.
    • The OSSF application requires site, soil, water-supply, facility, and design information.

    minimum suitable soil beneath proposed drain field: >= 24 inches · soil borings or backhoe pits: >= 2 borings/pits (in opposite ends of the proposed absorption area)

    “A SEPERATE PERMIT IS ALSO REQUIRED FOR INSTALLATION OF SEPTIC TANKS AND THE VERTIFICATION THAT SEPTIC TANKS WERE INSTALLED IN COMPLIANCE WITH ALL LEGAL REQUIREMENTS.”
    One more reviewed finding on this topic
  • Septic inspectionRequired

    Inspection of installed on-site sewage facilities in Willacy County.

    • A permit to operate is granted following successful inspection showing compliance with the OSSF rules.
    • The source authorizes the state commission to enter the property for lot evaluation and OSSF inspection.
    • Subdivision materials state that TCEQ or its authorized agent reviews and inspects OSSF systems as necessary.
    “a permit to operate the facility will be granted following successful inspection”
    One more reviewed finding on this topic
  • Off-grid sanitationLimited

    On-site sanitation where organized sewage service is unavailable or where an OSSF is proposed

    • The subdivision checklist requires the proposed on-site sewerage system to comply with applicable TCEQ rules.
    • The county OSSF application requires site evaluation, design materials, approval, and inspection.
    “The disposal system does not utilize a borehole, cesspool, or seepage pit (unauthorized systems under 30 TAC 285.3(i)), or a pit privy or portable toilet.”
  • Mandatory utility hookupConditional

    Subdivision plats and residential divisions reviewed by Willacy County.

    • Preliminary applications must list water and wastewater providers; if wastewater service is unavailable, the proposed onsite sewerage system must be identified. Final plats require utility provider letters or a utility-provider signature stating service is available upon request.
    “If wastewater service is not available list type of proposed on-site sewerage system.”
  • Subdividing landRegulated (with conditions)

    Subdivision platting and development in Willacy County

    • The checklist applies to all divisions.
    • Preliminary and final plat review, county approval, utility documentation, drainage, floodplain, and construction requirements may apply.
    • The preliminary approval process becomes void if final approval is not completed within one year.

    submission fee: 50 USD · preliminary plat review fee: 350 USD · additional fee: per 100 USD per lot (additional fees listed in the checklist)

    “These checklists have been developed by Willacy County to help the Sub-divider comply with the minimum subdivision rules and regulations set forth by state statute for subdivisions”
    One more reviewed finding on this topic
    • Regulated (with conditions) — Subdivision platting and related water, wastewater, and infrastructure requirements administered by Willacy County.
      “the Willacy County Commissioners Court shall refuse to approve the plat”
  • Driveway accessLimited

    Driveways and utility installations affecting Willacy County road right-of-way.

    • The building-fee schedule lists a driveway fee of $45.
    • For underground and utility work in county road right-of-way, driveway openings may not remain open after business hours.
    • Road open cuts on asphalt require Commissioners Court approval and must be inspected and approved by the County Engineer.

    driveway fee: 45 USD

    “No driveway will remain open after business hours.”
  • Building in a floodplainLimited

    Subdivision and development involving flood-hazard areas in Willacy County

    • Subdivision plats must identify flood-hazard areas and proposed floor elevations.
    • If an area is within a floodplain, documentation must explain how it will be removed from the floodplain.
    • Floodplain certification and applicable drainage documentation are required in the subdivision checklist.
    “Limits of flood hazard areas and the proposed floor elevation of buildings within flood hazard areas on each lot.”
  • Permit feesPublished

    Willacy County residential and commercial building-permit fees and listed inspection-plan-review fees.

    • Permit fees are payable to the county before issuance.
    • The county permit page states that permit fees are cash or check only.
    • Reinspection fees apply when the inspected work is incomplete, corrections are not made, or the structure is inaccessible.

    residential new construction: 0.18 USD per square foot · commercial new construction: 0.22 USD per square foot · permit processing fee: 5 USD · commercial plan review fee: 50 percent of permit fee · residential plan review fee: 25 percent of permit fee · driveway permit fee: 45 USD · manufactured home permit fee: 150 USD

    “(A)Any person applying to the city for a building permit shall pay to the county, prior to the issuance of the permit, a building permit fee for any improvement based on the following schedule: Permit Processing Fee $5.00 New Construction (Residential) $0.18 per square foot New Construction (Commercial) $0.22 per square foot”
    One more reviewed finding on this topic
    • Published — Willacy County plumbing permits and associated inspection and plan-review charges; the cited schedule does not publish an OSSF-specific fee amount.
      “Willacy County Plumbing Permit Fees Sec. 18-462 A.) All plumbing permits fees must be paid before any project is started. The schedule of fees is as follows:”
  • Permit processPublished

    Submission of Willacy County building, commercial, utility, floodplain, subdivision, and OSSF applications.

    • Permit submissions are made to the Tax Office Monday through Friday, 8:00-11:30 and 1:00-4:00.
    • The county official page provides application forms for residential, commercial, electrical, plumbing/gas, mechanical, OSSF, demolition, manufactured-home, moving, and utility permits.
    • The initial checklist requires a recorded plat, completed application, deed, and tax statement.

    morning submission window: 8:00am-11:30am · afternoon submission window: 1:00pm-4:00pm

    “Permits Submitted to Tax Office: Monday - Friday”
    One more reviewed finding on this topic
    • Published (with conditions) — County permit-submission process in Willacy County
      “Permits Submitted to Tax Office: Monday - Friday 8:00am - 11:30am 1:00pm - 4:00pm”
  • County-wide zoningAbsent

    Texas counties have no zoning authority in unincorporated areas; the county's land-use controls are limited to a Floodplain Ordinance and Subdivision Rules & Regulations, with no zoning ordinance.

    Willacy County Permits Department ↗Scouted from the county site, not yet independently re-checked

Texas rules that apply here

  • Owner-builder exemptionConditional

    An owner performing electrical, plumbing, or air-conditioning and refrigeration work on the owner's own residence or homestead in Texas.

    • Electrical work is exempt from state electrician licensing when performed on a dwelling the person owns and resides in.
    • Plumbing is exempt from state plumbing licensing when performed by the property owner in the property owner's homestead.
    • Air-conditioning and refrigeration contracting is exempt from the applicable state registration requirements when performed in a building owned solely by the person as the person's home.
    • These exemptions do not establish a blanket exemption for every construction trade or contractor-regulated activity.
    “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.”
    One more reviewed finding on this topic
    • 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”
  • Building code adoptedPartial

    Industrialized housing and buildings, modules, and modular components governed by the Texas Industrialized Housing and Buildings program.

    • The mandatory state code adoption applies to industrialized housing and buildings, modules, and modular components, not all construction statewide.
    • The effective date is July 1, 2024.
    • The International Existing Building Code applies to alterations of portable industrialized buildings.
    • Manufacturers already certified for Texas must have design-package documents reviewed and approved to the new editions with an approval date on or after July 1, 2024, unless the manufacturer elected to transition before the effective date under Department rule 70.70(a)(5)(B).
    • Construction begun on or after July 1, 2024 must comply with the new code editions and approved design packages.
    • Construction begun before July 1, 2024, or before a manufacturer's effective transition date, must meet the stated completion, inspection, and labeling deadline to remain eligible for a Texas decal.

    effective date: 2024-07-01 · International Building Code: 2021 Edition (including appendices C, F, and K) · International Residential Code: 2021 Edition (including appendices AG, AH, AK, AP, AQ, and AT) · International Fuel Gas Code: 2021 Edition · International Mechanical Code: 2021 Edition · International Plumbing Code: 2021 Edition · International Energy Conservation Code: 2015 Edition · National Electrical Code: 2020 Edition · International Existing Building Code: 2021 Edition (for alterations of portable industrialized buildings)

    “July 1, 2024, all industrialized housing and buildings, modules, and modular components shall comply with the following codes, as amended in §70.101 of the IHB Rules:”
    One more reviewed finding on this topic
    • Partial — Industrialized housing and buildings, modules, and modular components built for Texas under the Industrialized Housing and Buildings program.
      “Effective July 1, 2024, all industrialized housing and buildings, modules, and modular components shall comply with the following codes, as amended in §70.101 of the IHB Rules:”
  • Well permitLimited

    Drilling, equipping, operating, or completing a water well, or substantially altering a well or well pump, where the well is within a groundwater conservation district in Texas.

    • A groundwater conservation district must require a permit except as provided by Texas Water Code §36.117.
    • A district may not require a permit or permit amendment for maintenance or repair that does not increase production capability above the authorized or permitted production rate.
    • Permit applications must be in writing and sworn.
    • Whether a particular private well is exempt or subject to additional district requirements depends on the applicable groundwater conservation district's rules.

    permit application form: in writing and sworn

    “Except as provided by Section 36.117, a district shall require a permit for the drilling, equipping, operating, or completing of wells or for substantially altering the size of wells or well pumps.”
  • 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.”

Still unanswered

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

  • Certificate of occupancy — Certificate-of-occupancy requirements in Willacy County
  • Local zoning — Aggregate local zoning status across Willacy County's incorporated municipalities and unincorporated areas; the county itself is not treated as administering municipal ordinances.
  • Agricultural exemption — Agricultural exemptions from Willacy County construction, subdivision, or permitting rules
  • Short-term rentals — Short-term rental use in Willacy 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 Willacy County, Texas

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

Willacy County scores 43/100 on the Bolthole Index, a marginal county profile. Its strengths: manageable long-term carry cost and low administrative friction for a quiet rural property. Watch-outs: workable self-sufficiency basics (25.3″/yr rainfall) and elevated current hazard exposure.

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

Willacy 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 Willacy County Permits Department (TCEQ authorized agent). 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 Willacy County?

Living in an RV on your own land in Willacy County is allowed: Unincorporated Willacy County: no county rule sets this, because Willacy 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 co.willacy.tx.us. 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 Willacy County, Texas?

Land in Willacy County runs about $2,789 per acre, based on the latest county data.

What is the water situation in Willacy County?

Willacy County gets about 25.3" of rain a year, with severe drought in roughly 20.2% of years.

How remote is Willacy County?

A typical private-land location has about 17,694 people within 15 miles and 3,390,360 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Willacy compares in Texas

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