Bolthole Index

Smith County, Texas

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

67Index Score / 100
#57 of 254 in Texas

Unincorporated Smith County, Texas has no general county building permit for an ordinary home, but mapped floodplain development requires a county floodplain development permit1. Smith County has no traditional zoning outside cities2. Septic permits and inspections go through the county OSSF program, administered by RTS Environmental LLC, with a conditional large-tract exemption345.

At a glance

Building permit
No general permit; floodplain development is separately permitted1
Zoning
No traditional countywide zoning on unincorporated land2
Septic
Permitting is administered by RTS Environmental LLC; a narrow large-tract exception applies64
RV and tiny home
County zoning does not restrict occupancy; sanitation and floodplain rules still apply789
Minimum home size
No county zoning rule sets one7
Owner-builder
Some work on an owner's own home is exempt from state trade licensing; no blanket exemption10
Road access
County-road culverts are regulated; state-highway access needs TxDOT concurrence1112

Who to call

Floodplain permits

Smith County Engineer / Road & Bridge Department

County rights-of-way and the published floodplain-development permit form

903-590-4800

135 SSE Loop 323, Tyler, TX 75702

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 Smith County means bringing your own water and power. The kit we’d start with:

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.

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

Unincorporated Smith County has no general building-permit process for ordinary construction outside its subdivision and floodplain programs113. Smith County uses an adopted fire code for new-construction and existing-building fire and life-safety inspections; that does not establish a comprehensive county building code14. The county floodplain permit form covers development in mapped Zones A or B, including construction, alterations, fill and manufactured-home placement1. Inside Winona, building construction, alterations and repairs require the town's building permit15. Septic administration remains with Smith County's OSSF program through RTS Environmental LLC6.

Who handles building-related approvals in Smith County, Texas?

The Smith County Engineer / Road & Bridge Department handles county rights-of-way and publishes the floodplain-development permit form16. Reach Road & Bridge at 903-590-4800 or 135 SSE Loop 323, Tyler, TX 7570216. Septic permitting questions go to RTS Environmental LLC at 903-630-4234 or smithcountyossf@yahoo.com17. Published county fees are $250 for subdivisions with roads, $100 without roads, and $25 for replats or lot-line adjustments18. Manufactured-home rental community approval and floodplain development permits each cost $100; the schedule makes fees non-refundable and payable before final plat approval18. Fire inspection fees vary by inspection type and building category19.

Does Smith County have zoning?

Unincorporated Smith County has no traditional countywide zoning ordinance2. County zoning sets no minimum dwelling or lot size, setback, lot-coverage cap or height limit, and does not restrict accessory dwellings, manufactured homes, tiny homes, RV occupancy or temporary camping there7. Lindale and Winona administer their own zoning inside municipal limits2021. Septic administration stays with Smith County's OSSF program through RTS Environmental LLC6. Tyler also administers its own zoning, which does not apply to unincorporated Smith County22. Separate subdivision, floodplain and septic requirements still apply outside cities14.

How do septic permits work in Smith County?

Smith County is the local OSSF authority, with RTS Environmental LLC administering the program as county contractor23. Installation or repair ordinarily requires evaluation, design and permitting through a licensed installer and registered sanitarian4. Septic and aerobic systems must ordinarily be maintained and inspected24. The county lists a minimum septic lot size of 0.5 acre, except for land platted before 19894. A single-family dwelling on at least 10 acres needs no OSSF planning materials, permit or inspection only if the system causes no nuisance or groundwater pollution, every part is at least 100 feet from the property line, effluent stays on the property, and the home is the tract's only dwelling425. Only 27.5% of county soils lack severe conventional drain-field limitations, so arrange a site evaluation before choosing the homesite26.

Can you live in an RV or tiny home in Smith County?

For an RV or tiny home on unincorporated Smith County land, resolve sewage disposal and floodplain requirements before occupancy: private OSSF sanitation follows the county process unless the qualifying single-family dwelling exemption applies278. The large-tract exemption is not a general exemption for every off-grid arrangement; its conditions require a single-family dwelling as the tract's only dwelling8. Floodplain rules also cover manufactured-home placement and other development1. A manufactured-home rental community needs a Certificate of Compliance before water, sewer, gas or electric service may begin28. Access from a state-maintained road requires TxDOT concurrence and an executed driveway permit before construction in the right-of-way1229.

What are the steps to build a home in Smith County, Texas?

  1. Confirm the parcel is outside city limits; the county permit answer here concerns unincorporated Smith County1.
  1. Check the flood map and take proposed development in a regulated hazard area to Road & Bridge for floodplain review3016.
  1. Arrange OSSF evaluation, design, and permitting through a licensed installer, registered sanitarian, and RTS Environmental3117.
  1. Resolve access: county rules govern relevant culverts, while state-road access requires TxDOT concurrence and a driveway permit111229.
  1. Ask whether fire and life-safety inspection applies to the project32.
  1. Verify utilities, deed restrictions, easements, and plat status; manufactured-home rental communities need a Certificate of Compliance for utility service28.

What should you check before buying Smith County land?

Check flood exposure, septic suitability and road access before choosing a homesite. Smith County's floodplain permit form requires residential lowest floors, including basements, to be at least 1 foot above the expected 100-year flood level, with plans and calculations prepared and sealed by a registered professional engineer or land surveyor9. Agricultural work is not automatically exempt: qualifying unrestricted floodplain uses must avoid structures, fill, channel changes, obstruction and material storage33. Only 27.5% of county soils lack severe conventional drain-field limitations26. County culvert rules place pipe costs and ongoing maintenance on the owner but do not establish a universal driveway permit11. We could not confirm a general private-well permit or certificate-of-occupancy requirement; ask Road & Bridge which office should review the parcel.

Watch-outs

  • Smith County's fire and life-safety code program applies in unincorporated areas even without a general county building-permit process34.
  • A large tract is not automatically exempt from septic permitting; every condition of the single-family OSSF exception must be satisfied35.
  • Agricultural structures, fill, channel changes, and material storage in a flood-hazard area can still trigger floodplain permitting33.

Sources

  1. County Ordinances & Policies, quoted and re-checked
  2. Smith County Subdivision Regulations (revised 2023) (2026 county census)
  3. On-Site Sewage Facility, quoted and re-checked
  4. On-Site Sewage Facility, quoted and re-checked
  5. On-Site Sewage Facility, quoted and re-checked
  6. On-Site Sewage Facility, quoted and re-checked
  7. Texas law on county zoning and building authority
  8. On-Site Sewage Facility, quoted and re-checked
  9. Current Smith County Subdivision Regulations, quoted and re-checked
  10. Exemptions to Electrician Licensing (Texas statewide rule), quoted and re-checked
  11. Driveway Culverts Policy, quoted and re-checked
  12. Subdivision Regulations, quoted and re-checked
  13. Flood Damage Prevention Regulation, quoted and re-checked
  14. Fire Marshal Inspections, quoted and re-checked
  15. Town of Winona: Sec. 6-46. - Required (Smith County), quoted and re-checked
  16. Smith County Engineer / Road & Bridge Department (smith-county.com)
  17. Smith County OSSF Program (RTS Environmental LLC, contractor) (smith-county.com)
  18. Subdivision Regulations, quoted and re-checked
  19. Subdivision Regulations, quoted and re-checked
  20. Lindale: Lindale building code appeal provision referencing zoning ordinance (Smith County), quoted and re-checked
  21. Town of Winona: Sec. 22-65. - Offense to operate business in prohibited area (Smith County), quoted and re-checked
  22. Unified Development Code, quoted and re-checked
  23. On-Site Sewage Facility, quoted and re-checked
  24. On-Site Sewage Facility, quoted and re-checked
  25. On-Site Sewage Facility, quoted and re-checked
  26. 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
  27. On-Site Sewage Facility, quoted and re-checked
  28. Subdivision Regulations, quoted and re-checked
  29. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  30. Flood Damage Prevention Ordinance, quoted and re-checked
  31. On-Site Sewage Facility, quoted and re-checked
  32. Fire Marshal Inspections, quoted and re-checked
  33. Flood Damage Prevention Regulation, quoted and re-checked
  34. County Ordinances & Policies, quoted and re-checked
  35. On-Site Sewage Facility, 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.

Found land here? Start a Property Hunt →

Compared with neighboring counties

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

RuleSmith CountyGregg CountyWood CountyUpshur CountyVan Zandt CountyHenderson CountyRusk County
Building permitLimitedNot requiredNot requiredLimitedLimitedLimitedNot required
County zoningNoNoNoNoNoNoNo
Septic permitsSmith CountyCounty Health Dept.County OSSF authorized agentNETMWDCounty Abatement/Env. OfficeCounty Septic ServicesRusk County

County locator

Smith County in Texas

67
County map
Smith County highlighted among the Texas counties · colored by Index score

How Smith County scores

Seclusion29100% ev.
Self-Sufficiency73100% ev.
Admin Boringness7290% ev.
Durability69100% ev.
Property Autonomy71100% ev.
Carry Cost66100% 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 →

$274kTypical home
1.2%Property tax
$7,161Land / acre
46.2"Annual rain
14.9% of yrsSevere drought
27.5 / yr (+20.3)Mid-century 100°F days
21.2 daysMid-century dry spell
2.48" (+6.4%)Mid-century 1-day rain
1.4×Wildfire change factor
100%Forward climate coverage
$2,139Home insurance / yr
0.4% / yrInsurance growth
0%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
183,956People within 30 min
5,796,738People within 2 hr
145,838Radius comparison (15 mi)
266.1People / sq mi
0%Federal land
93.9%Land at 15% slope or less
27.5%Soils rated "not limited" for septic (strict USDA rating)
156,705 acWorkable land screen
54.9%Wooded land
41.3 tonsBiomass / forest ac
65.4°FAvg temp

Scout Smith County

Camp here before you commitBook a few nights nearby on Hipcamp →Already own land here?Earn money hosting campers — get $100 when you become a Hipcamp host →

Some links are affiliate or referral links — we may earn a commission, at no cost to you.

Property hunt

Find land. Bring the promising ones back.

Search live inventory elsewhere, then cost and vet each candidate here. No copied listings, account, or paid data feed.

View your full hunt →
ZillowLand & lotsRealtor.comLand listingsLandSearchRural & vacant land

Each button opens a current land search for Smith County. Listing sites control their own results and filters.

Analyze a property
Add setup-cost allowances

Use rough quotes or placeholders. Blank fields count as $0.

Working estimate

—land + entered setup costs
Asking $ / acre
—
Setup allowance
—
All-in $ / acre
—

A planning estimate, not a valuation or contractor quote. The USDA benchmark includes farm land and buildings; it is context, not a parcel comp.

Before an offer

Parcel due diligence

0/8 checked

Saved properties and checklist progress stay on this device. Bolthole Index does not receive them.

Cities and towns in Smith 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: Arp · Town of Bullard · Hideaway · New Chapel Hill · Noonday · Troup · Tyler

Answers from the rulebook for Smith County

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

Smith County rules

  • Building permitLimited

    Construction and development in unincorporated Smith County, with a specific county permit requirement for development in mapped floodplain Zones A or B.

    • The county states that, other than subdivision regulations, it has no local building policies for construction in unincorporated areas.
    • A floodplain development permit applies to development in Zones A or B on FEMA FIRM maps.
    • The floodplain permit form includes new construction, alterations, fill, substantial improvements, manufactured homes or buildings, churches or schools, and medical facilities.
    “Other than subdivision regulations, Smith County has no local building policies for construction in unincorporated areas of the county.”
    One more reviewed finding on this topic
    • Limited — Construction and other development in areas regulated by Smith County floodplain rules; ordinary construction outside those county programs is not established by the cited county page as requiring a county building permit.
      “Other than subdivision regulations, Smith County has no local building policies for construction in unincorporated areas of the county.”
  • Building code adoptedPartial

    Smith County's county-level building regulation in unincorporated areas and its fire/life-safety inspection program.

    • Smith County states that, other than subdivision regulations, it has no local building policies for construction in unincorporated areas.
    • Fire and life-safety inspections in unincorporated Smith County must be performed by a fire inspector or approved designee.
    • The county fire inspection standard is NFPA 101 20215 edition, NFPA 1, and other referenced codes and standards.

    fire and life safety inspection standard: NFPA 101 20215 ed., NFPA 1 and other referenced codes and standards

    “Other than subdivision regulations, Smith County has no local building policies for construction in unincorporated areas of the county.”
    2 more reviewed findings on this topic
    • Partial — Fire and life-safety inspections for new and existing buildings in unincorporated Smith County.
      “new buildings constructed in Smith County are built in compliance with the adopted fire code [...] all fire and life safety inspections in unincorporated Smith County”
    • Partial — Fire and life-safety inspection enforcement for new construction and existing buildings in unincorporated Smith County.
      “The Smith County Fire Marshal's Inspections Division is responsible for ensuring that new buildings constructed in Smith County are built in compliance with the adopted fire code and that all existing buildings are maintained to prevent fire and life safety hazards.”
  • InspectionsLimited

    Fire and life-safety inspections, including new-construction inspections, in unincorporated Smith County.

    • The cited requirement is for fire and life-safety inspections, not a general structural-building inspection program.
    • Inspections are conducted during normal business hours Monday through Friday.
    • The Fire & Life Safety Inspection Standard is NFPA 101 20215 ed., NFPA 1, and other referenced codes and standards.
    “In accordance with Local Government Code, Chapter 352.016, all fire and life safety inspections in unincorporated Smith County must performed by a fire inspector, or approved designee.”
  • Zoning districts · by state lawNo county rule

    Unincorporated Smith County: no county rule sets this, because Smith 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 smith-county.com.

    • 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 Smith County: no county rule sets this, because Smith 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 smith-county.com.

    • 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 Smith County: no county rule sets this, because Smith 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 smith-county.com.

    • 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 Smith County: no county rule sets this, because Smith 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 smith-county.com.

    • 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 Smith County: no county rule sets this, because Smith 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 smith-county.com.

    • 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 Smith County: no county rule sets this, because Smith 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 smith-county.com.

    • 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 Smith County: no county rule sets this, because Smith 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 smith-county.com.

    • 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 Smith County: no county rule sets this, because Smith 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 smith-county.com.

    • 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 Smith County: no county rule sets this, because Smith 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 smith-county.com.

    • 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 Smith County: no county rule sets this, because Smith 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 smith-county.com.

    • 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 Smith County: no county rule sets this, because Smith 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 smith-county.com.

    • 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 (with conditions)

    Administration of on-site sewage facilities in Smith County through the county's designated contractor.

    • RTS Environmental LLC is identified as the contractor for Smith County.
    • The page also directs applicants to a licensed installer and registered sanitarian for design and permitting.
    “RTS Environmental LLC, run by Trace Stanley, is the contractor for Smith County. The office can be reached at 903-630-4234 or smithcountyossf@yahoo.com”
    3 more reviewed findings on this topic
    • County (with conditions) — On-site sewage facility administration in Smith County.
      “RTS Environmental LLC, run by Trace Stanley, is the contractor for Smith County.”
    • County — Residential and commercial on-site sewage facilities administered for Smith County.
      “RTS Environmental LLC, run by Trace Stanley, is the contractor for Smith County.”
    • County (with conditions) — Local administration of on-site sewage facilities in Smith County.
      “RTS Environmental LLC, run by Trace Stanley, is the contractor for Smith County. The office can be reached at 903-630-4234 or smithcountyossf@yahoo.com”
  • Septic permitRequired

    Installation or repair of septic and aerobic on-site sewage systems in Smith County.

    • The page directs owners to use a licensed installer and registered sanitarian for system design and permitting.
    • Under the Chapter 285.3 10-acre rule, no planning materials, permits, or inspection are required for a qualifying single-family dwelling on a tract of 10 acres or larger.
    • The 10-acre exception requires 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 to be the only dwelling on the tract.

    minimum lot size: >= 0.5 acre (unless the land was plotted before 1989) · 10-acre exception tract size: >= 10 acres (subject to all stated Chapter 285.3 conditions)

    “If an installer says you don’t have to permit or ask you if you want to permit your system, please call RTS Environmental LLC, at 903-630-4234, to verify.”
    One more reviewed finding on this topic
    • Limited — Installation or repair of an OSSF in Smith County.
      “No planning materials, permits, or inspection are required for an OSSF for a single-family dwelling located on a tract of land that is 10 acres or larger and”
  • Septic inspectionRequired

    Existing septic or aerobic systems in Smith County.

    • The county page states that septic or aerobic systems must be maintained and inspected.
    • The Chapter 285.3 exception removes inspection requirements for an OSSF serving a qualifying single-family dwelling on a tract of at least 10 acres, subject to the listed nuisance, groundwater, setback, on-property effluent, and single-dwelling conditions.

    minimum property-line setback: >= 100 feet (for all parts of a qualifying 10-acre-rule OSSF)

    “If you have a septic or aerobic system, you are required to maintain it and have it inspected.”
    2 more reviewed findings on this topic
    • Limited — Existing septic or aerobic systems and OSSF installation in Smith County.
      “If you have a septic or aerobic system, you are required to maintain it and have it inspected.”
    • Limited — Existing septic or aerobic systems in Smith County.
      “If you have a septic or aerobic system, you are required to maintain it and have it inspected.”
  • Off-grid sanitationLimited

    Private on-site sewage sanitation in Smith County, including qualifying large rural tracts.

    • OSSF installation or repair ordinarily follows evaluation, design, and permitting through licensed installers and registered sanitarians.
    • A qualifying single-family dwelling on a tract of at least 10 acres may use the Chapter 285.3 exception without planning materials, permits, or inspection, subject to the stated environmental, setback, disposal, and occupancy conditions.

    minimum setback from property line: >= 100 feet (applies to the Chapter 285.3 10-acre exception)

    “No planning materials, permits, or inspection are required for an OSSF for a single-family dwelling located on a tract of land that is 10 acres or larger and”
    2 more reviewed findings on this topic
    • Limited — On-site sanitation for qualifying single-family dwellings in Smith County.
      “No planning materials, permits, or inspection are required for an OSSF for a single-family dwelling located on a tract of land that is 10 acres or larger and”
    • Limited — On-site, non-sewer sanitation using an OSSF in Smith County.
      “The effluent is disposed of on the property.”
  • Mandatory utility hookupConditional

    Utility service to a manufactured-home rental community or manufactured home governed by the county subdivision regulations.

    • A utility may not provide water, sewer, gas, or electric service unless the owner provides a Certificate of Compliance.
    • The certificate does not indicate compliance with city, state, or federal requirements.
    “A utility may not provide utility services, including water, sewer, gas, and electric services, to a manufactured home rental community or to a manufactured home in the community unless the owner provides the utility with a copy of the certificate of compliance.”
  • Agricultural exemptionConditional

    Agricultural uses and development in Smith County flood hazard areas.

    • Agricultural development must be constructed to USDA and Soil Conservation Service standards to qualify as an unrestricted use.
    • Unrestricted uses must not obstruct flood flows, be prohibited by another court order, or require structures, fill, stream-channel alteration, or storage of materials or equipment.
    • Agricultural development requiring a permit is generally limited to residential structures, permanent barns, shops, poultry facilities, and similar structures in identified flood hazard areas.
    “Development for agricultural purposes which is constructed to the standards of the United States Department of Agriculture and Soil Conservation Service.”
  • Driveway accessLimited

    Individual driveway culverts in Smith County right-of-way, outside subdivision drainage plans.

    • The policy applies to driveway culverts and drainage within Smith County right-of-way and the county's unincorporated areas.
    • Residential culverts must be 20 to 40 feet long; commercial culverts must be 20 to 80 feet long.
    • Culverts must carry a ten-year storm, with headwater depth no greater than the pipe diameter.
    • The property owner pays for the approved culvert pipe and is responsible for maintenance and repairs after the county's initial installation labor.
    • Subdivision regulations preempt this policy for culverts or driveways located within subdivisions.
    • The Road & Bridge Department may inspect and inform the owner of the necessary culvert size upon request.
    • The policy text opened does not state a separate driveway-access permit or approval requirement outside subdivision plans.

    minimum culvert diameter: >= 15 inches (may need to be larger depending on natural flow) · residential culvert length: 20-40 feet · commercial culvert length: 20-80 feet · design storm: 10 year (headwater depth may not exceed pipe diameter)

    “The intent of this policy is that Smith County will not incur on-going maintenance costs after generally providing labor for initial culvert installation in the unincorporated areas ofthe county.”
    One more reviewed finding on this topic
    • Limited — Subdivision and development access involving Smith County roads or state-maintained rights-of-way.
      “TxDOT access concurrence when proposed access will include ingress and/or egress to a state maintained right of way.”
  • Building in a floodplainRequired

    Development in floodplain Zones A or B designated on FEMA FIRM maps in Smith County.

    • The Flood Plain Development Permit is for property owners, builders, and developers planning development in Zones A or B.
    • Residential structures must have the lowest floor, including basement, elevated 1.0 foot above the expected 100-year flood level.
    • Non-residential structures must be flood-proofed for 100-year flood forces or have the lowest floor elevated at least 1.0 foot above the 100-year flood level.
    • Foundations and materials must withstand 100-year flood forces.
    • Water-supply inlets and private sewage-facility outlets require automatic backflow devices.
    • Plans, surveys, specifications, and calculations must be prepared, signed, dated, and sealed by a registered professional engineer or land surveyor.

    residential elevation above 100-year flood level: >= 1 foot · private sewage and water supply backflow protection: true

    “Flood Plain Development Permit To be completed by property owners, builders, and/or developers planning any development in Zones A or B of the Flood Plain as designated on FEMA FIRM maps”
    One more reviewed finding on this topic
    • Required — Development in areas of special flood hazard regulated by the Smith County Flood Damage Prevention Ordinance.
      “Review, approve or deny all applications for development permits required by the adoption of this ordinance.”
  • Permit feesPublished (with conditions)

    County subdivision and related development approvals in unincorporated Smith County and county-controlled city ETJ areas.

    • The subdivision regulations apply to subdivisions and developments in unincorporated county areas and listed city ETJ areas under county authority.
    • All fees are non-refundable and must be paid in full before final plat approval.
    • Published fees include subdivision with roads, subdivision with no roads, replats or lot-line adjustments, manufactured home rental communities, floodplain development permits, and materials testing.

    subdivision with roads fee: 250 USD · subdivision with no roads fee: 100 USD · replat or lot-line adjustment fee: 25 USD · manufactured home rental community fee: 100 USD · floodplain development permit fee: 100 USD · materials testing with curb and gutter: per 1.5 USD per foot of road centerline · materials testing without curb and gutter: per 1 USD per foot of road centerline

    “4.1.5. Fees: All fees are non-refundable and must be paid in full prior to final plat approval. 4.1.5.1. Schedule of fees: Subdivision with roads $250 Subdivision with no roads $100 Replat (lot line Adjustment) $25 Manufactured Home Rental Community $100 Flood Plain Development Permit $100 Materials Testing (per ft. of road centerline) for Curb & Gutter Roads $1.50/ft. Materials Testing (per ft. of road centerline) for non-Curb & Gutter Roads $1.00/ft.”
    One more reviewed finding on this topic
    • Published — Published fees for county-administered subdivision, flood-plain development, and fire/life-safety inspection processes in Smith County.
      “Subdivision with roads $250 Subdivision with no roads $100 Replat (lot line Adjustment) $25 [...] Flood Plain Development Permit $100”
  • Permit processPublished (with conditions)

    Smith County subdivision plat applications and floodplain development permits.

    • Plat applications must include required documentation.
    • Incomplete applications require notice of missing documents within 10 business days.
    • Final action is generally due within 60 days after a completed application is received, subject to stated extensions.
    • Floodplain applications are reviewed by the Floodplain Administrator.

    missing-document notice: <= 10 business days · final plat action: <= 60 days (subject to statutory extensions)

    “If a person submits a plat application to the commissioners court that does not include all of the documentation or other information required by Subsection (a), the commissioners court or the court's designee shall, not later than the 10th business day after the date the commissioners court receives the application, notify the applicant of the missing documents or other information.”
    2 more reviewed findings on this topic
    • Partial — County permitting processes for on-site sewage facilities and floodplain development in Smith County.
      “To: Director, Smith County Road & Bridge Department P.O. Box 990; Tyler, Texas 75710; (903)-590-4801”
    • Partial — Subdivision and floodplain-development permit processes administered by Smith County.
      “review the construction plans for their conformance”
  • County-wide zoningAbsent

    Smith County regulates subdivisions and floodplain development in unincorporated areas; its current county regulations do not establish traditional county-wide land-use zoning.

    Smith County Subdivision Regulations (revised 2023) ↗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”
  • 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.”

Inside cities and towns in Smith County

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

  • Local zoningPresent (with conditions)

    Land-use zoning within the City of Tyler, a municipality located in Smith County, Texas.

    • The City of Tyler's zoning applies within the municipality and is not a countywide rule for unincorporated Smith County.
    • The official city page identifies zoning districts, permitted uses, zoning-change applications, and special-use-permit review.
    • The cited example states that use in the M-1 Light Industrial District was permissible only with a Special Use Permit.
    “The UDC provides for zoning classifications that encourage sustainable growth in Tyler.”
    One more reviewed finding on this topic
    • Present (with conditions) — Zoning regulation within the incorporated City of Tyler, Smith County, Texas.
      “The UDC provides for zoning classifications that encourage sustainable growth in Tyler.”

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 unincorporated Smith County.
  • Short-term rentals — Short-term rental regulation in Smith 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 Smith County, Texas

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

Smith County scores 67/100 on the Bolthole Index, a strong county profile. Its strengths: workable self-sufficiency basics: 46.2″/yr rainfall and 54.9% wooded land and low administrative friction for a quiet rural property. Watch-outs: about 183,956 people within a 30-minute drive.

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

Smith 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 Smith County (TCEQ Authorized Agent), OSSF program administered via RTS Environmental LLC. 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 Smith County?

Living in an RV on your own land in Smith County is allowed: Unincorporated Smith County: no county rule sets this, because Smith 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 smith-county.com. 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 Smith County, Texas?

Land in Smith County runs about $7,161 per acre, based on the latest county data.

What is the water situation in Smith County?

Smith County gets about 46.2" of rain a year, with severe drought in roughly 14.9% of years.

How remote is Smith County?

A representative private-land location has about 183,956 people within a 30-minute drive and 5,796,738 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

How Smith compares in Texas

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