Bolthole Index

Dimmit County, Texas

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

46Index Score / 100
#160 of 254 in Texas

Unincorporated Dimmit County, Texas does not require a residential building permit, but a separate state-law inspection requirement applies if the county adopted the residential-inspection subchapter12. We could not confirm whether Dimmit County adopted it, so ask the County Judge's office before work begins. The county has no zoning ordinance, but Carrizo Springs has city zoning and septic systems generally require an OSSF permit345.

At a glance

Building permit
Not required; Dimmit County has no known building-permit department1
Zoning
No county zoning ordinance on unincorporated land; Carrizo Springs has city zoning634
Septic (OSSF) permit
Required statewide before installing or repairing a system off public sewer; local vs. TCEQ authority in Dimmit is unconfirmed57
Septic 10-acre exemption
A single-family home on 10+ acres can skip the OSSF permit if it meets the state's site-evaluation, setback, and single-dwelling conditions5
Residential inspections
Required only if Dimmit County adopted the applicable state-law subchapter; county adoption is unconfirmed2
RV, tiny home, manufactured home
No county zoning rule restricts these on unincorporated land, because Dimmit County has no zoning authority to set one3
Septic soil difficulty
About 23.2% of county soils are free of severe limits for a conventional drain field8
Driveway onto a state highway
Needs a TxDOT Form 1058 access-driveway permit before you build it910

Who to call

Also useful

Dimmit County Judge / Commissioners Court

County government administration; the County Judge presides over Commissioners Court, the county's governing body, and this office is the practical starting point for any land-use question not handled by a specific department, including confirming whether the county still issues septic permits itself

(830) 876-9904

countyjudge@dimmitcounty.org

212 N. 4th Street, Carrizo Springs, Texas 78834

Septic permits

TCEQ Region 16 (Laredo)

The Texas Commission on Environmental Quality's regional office covering Dimmit County; TCEQ's state OSSF (septic) permitting authority for any location where the county's own authorized-agent status is not confirmed

956-791-6611

707 E Calton Rd, Ste 304, Laredo, TX 78041-3887

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Off-grid gear

Going off-grid in Dimmit 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 Dimmit County, Texas?

No. Unincorporated Dimmit County has no building-permit department, and Texas counties generally lack authority to require prior approval or a permit for ordinary residential construction1. A building permit and a construction inspection are not the same thing: if Dimmit County adopted the applicable residential-inspection subchapter, a new home on a vacant lot must receive at least three inspections covering the foundation, framing and mechanical systems, and completion, with the builder hiring an authorized inspector2. That subchapter applies only if the county adopted a resolution or order requiring it, and it does not require county approval before construction begins11. We could not confirm that Dimmit County adopted it, so ask the County Judge's office before construction begins12. If the subchapter applies, its owner-builder exception protects a person building a primary residence from penalties for missed notices, not from the inspections themselves13. An agricultural building's narrow exception from dangerous-substance enforcement is not a blanket waiver of septic, subdivision, or other land rules14.

Who handles county government and septic permits in Dimmit County, and how do you reach them?

There is no separate Dimmit County building department to call, since the county does not require building permits for ordinary construction1. Ask the Dimmit County Judge's office whether the county adopted the state residential-inspection subchapter and who accepts any required notices; the office is at 212 N. 4th Street, Carrizo Springs, Texas 78834, phone (830) 876-9904212. Septic is handled differently: Dimmit County appears in TCEQ's 2021 activity data as having issued OSSF permits, but that record does not establish who administers the program now15. Where no local jurisdiction is authorized, TCEQ's regional office is the permitting authority; Dimmit County is covered by TCEQ Region 16 in Laredo, at 707 E Calton Rd, Ste 304, Laredo, TX 78041-3887, phone 956-791-6611716.

Does Dimmit County have zoning?

No. Dimmit County has no comprehensive zoning ordinance for unincorporated land63. Unincorporated Dimmit County therefore sets no zoning-based minimum dwelling size, minimum lot size, setback, lot-coverage percentage, building-height limit, or use district3. The same answer covers accessory dwellings, RVs, tiny homes, manufactured homes, and temporary camping: the county does not restrict those uses through zoning on unincorporated land3. Carrizo Springs is different: the city has a zoning map and maintains a Planning & Zoning Commission, so check city zoning for parcels within Carrizo Springs4. We could not confirm the zoning status of every other municipality in Dimmit County.

How do septic permits work in Dimmit County?

Texas requires a permit to construct, install, alter, extend, or repair an on-site sewage facility (OSSF), and Dimmit County is no exception5. Local governments often act as TCEQ-authorized agents, while the TCEQ regional office is the permitting authority where no local jurisdiction is authorized17. An authorized agent reviews applications, conducts inspections, and investigates complaints, although the available rule does not establish one inspection schedule for every system and Dimmit County's current delegation remains unconfirmed18. A single-family home on a tract of 10 acres or more can qualify for the state's permit exemption only if a licensed site evaluator or professional engineer evaluates the site, every system component is at least 100 feet from the property line, effluent stays on the property, no nuisance or groundwater pollution results, and the home is the tract's only dwelling5. The permitting authority must decide a complete application and planning materials within 30 days and give a written explanation for a denial19. Only about 23.2% of Dimmit County soils lack severe limits for a conventional drain field, so obtain the site evaluation before committing to a system design8.

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

Unincorporated Dimmit County has no zoning ordinance, so the county sets no zoning rule against RV occupancy, tiny-home occupancy, or manufactured-home placement there3. Sanitation remains separate: a property off public sewer generally needs an OSSF permit unless the tract satisfies every condition of the state's 10-acre exemption5. A new tiny home built as a residence may also be subject to the state-law construction inspections if Dimmit County adopted the applicable subchapter; we could not confirm county adoption2. Carrizo Springs has city zoning, so ask the city about occupancy and land-use rules for a parcel within its limits4. We could not confirm those rules for every other municipality in Dimmit County.

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

  1. Confirm whether the parcel is in unincorporated Dimmit County or Carrizo Springs, where city zoning applies4.
  2. On unincorporated land, there is no county building permit to apply for1.
  3. Before work begins, ask the County Judge's office whether Dimmit County adopted the residential-inspection subchapter; if it applies to a new home on a vacant lot, arrange at least three inspections with an authorized inspector212.
  4. If you will act as your own contractor, remember that the owner-builder exception concerns notice penalties and does not erase an applicable inspection requirement13.
  5. Ask the County Judge's office to identify the current OSSF authority, using TCEQ Region 16 if no local jurisdiction is authorized71216.
  6. Determine whether the state's 10-acre septic exemption applies, and get a site evaluation early because only about 23.2% of county soils lack severe limits for a conventional drain field58.
  7. Check the FEMA flood map and ask the County Judge's office for the current floodplain process before developing in a designated flood hazard area2012.
  8. If clearing and construction will disturb 1 acre or more and discharge stormwater to a surface water, TCEQ's Construction General Permit applies and notices are filed online through STEERS21.
  9. If your driveway connects to a state highway, submit TxDOT Form 1058 and obtain the access permit before construction2210.

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

Confirm whether the parcel is inside Carrizo Springs or unincorporated, because Carrizo Springs publishes a city zoning map while unincorporated Dimmit County has no county zoning ordinance233. Get a soil evaluation before closing if you plan to install septic: only about 23.2% of Dimmit County soils lack severe limits for a conventional drain field8. Check the FEMA map as well; Dimmit County participates in the National Flood Insurance Program and must maintain floodplain-management rules for designated flood hazard areas, but the current county application, fees, and activity-specific standards were not confirmed20. A driveway onto a state highway requires a TxDOT Form 1058 permit910. Agricultural valuation applies to qualifying land rather than barns, tanks, or ranch outbuildings, and an agricultural structure's narrow exception from dangerous-substance enforcement is not a blanket exemption from other rules2414. Before splitting a tract, ask the County Judge's office about subdivision requirements under Texas law2512.

Watch-outs

  • Dimmit County's septic-permitting authority is unconfirmed: TCEQ's 2021 data shows the county issuing OSSF permits that year, but no current delegation record was found, so confirm with the County Judge's office whether the county or TCEQ's regional office currently issues the permit before you apply151216.
  • Dimmit County participates in the National Flood Insurance Program and regulates development in designated flood hazard areas, but we could not confirm the current application, fees, or activity-specific standards; ask the County Judge's office before building in a mapped floodplain2012.
  • Well-permit rules for individual private wells in Dimmit County, including which groundwater conservation district (if any) applies, were not confirmed by any official source in this research; ask the County Judge's office or a local licensed well driller before you count on one12.

Sources

  1. Bexar County FAQ — County authority to require building permits (Texas framework) (2026 county census)
  2. Texas Local Government Code Chapter 233: County Regulation of Housing and Other Structures, quoted and re-checked
  3. Texas law on county zoning and building authority
  4. Regular City Council Meeting 05/13/2025, quoted and re-checked
  5. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  6. Bexar County FAQ — County zoning authority (Texas framework) (2026 county census)
  7. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  8. 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
  9. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  10. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  11. Texas Local Government Code Chapter 233: County Regulation of Housing and Other Structures, quoted and re-checked
  12. Dimmit County Judge / Commissioners Court (dimmitcounty.org)
  13. Texas Local Government Code Chapter 233: County Regulation of Housing and Other Structures, quoted and re-checked
  14. Local Government Code Chapter 233: County Regulation of Housing and Other Structures, quoted and re-checked
  15. tceq.texas.gov, quoted and re-checked
  16. TCEQ Region 16 (Laredo) (tceq.texas.gov)
  17. Getting a Permit for an OSSF - Such as a Septic System (Texas statewide rule), quoted and re-checked
  18. How to Become a Texas On-Site Sewage Facility (Septic System) Authorized Agent, quoted and re-checked
  19. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  20. FEMA - Community Listing of CEO and FPA, quoted and re-checked
  21. Stormwater General Permit for Construction Activities, quoted and re-checked
  22. Section 6: Access Driveways, quoted and re-checked
  23. Zoning Map | Carrizo Springs, Texas, quoted and re-checked
  24. Dimmit Central Appraisal District Agricultural Policies and Procedures, quoted and re-checked
  25. Subdivisions and Platting Requirements, quoted and re-checked

Written October 10, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

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

RuleDimmit CountyZavala CountyMaverick CountyLa Salle CountyFrio CountyWebb CountyUvalde County
Building permitNot requiredNot requiredLimitedLimitedNot requiredRequiredNot required
County zoningNoNoNoNoNoNoNo
Septic permitsDimmit CountyZavala CountyMaverick CountyLa Salle CountyFrio CountyCounty Planning Dept.County Sanitarian

County locator

Dimmit County in Texas

46
County map
Dimmit County highlighted among the Texas counties · colored by Index score

How Dimmit County scores

Seclusion73100% ev.
Self-Sufficiency1696% ev.
Admin Boringness87100% ev.
Durability35100% ev.
Property Autonomy71100% ev.
Carry Cost82100% ev.

Evidence strength: 99%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$137kTypical home
1.1%Property tax
$1,777Land / acre
20.5"Annual rain
29.7% of yrsSevere drought
88.5 / yr (+46.7)Mid-century 100°F days
36.6 daysMid-century dry spell
2.02" (+7.2%)Mid-century 1-day rain
1.32×Wildfire change factor
100%Forward climate coverage
$1,582Home insurance / yr
-0.7% / yrInsurance growth
0%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
4,673Radius comparison (15 mi)
6.2People / sq mi
0%Federal land
100%Land at 15% slope or less
23.2%Soils rated "not limited" for septic (strict USDA rating)
185,887 acWorkable land screen
5.2%Wooded land
6 tonsBiomass / forest ac
71.9°FAvg temp

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Cities and towns in Dimmit 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: Asherton · Big Wells

Answers from the rulebook for Dimmit County

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

Dimmit County rules

  • Zoning districts · by state lawNo county rule

    Unincorporated Dimmit County: no county rule sets this, because Dimmit 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 bexar.org.

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

    Unincorporated Dimmit County: no county rule sets this, because Dimmit 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 bexar.org.

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

    Unincorporated Dimmit County: no county rule sets this, because Dimmit 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 bexar.org.

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

    Unincorporated Dimmit County: no county rule sets this, because Dimmit 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 bexar.org.

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

    Unincorporated Dimmit County: no county rule sets this, because Dimmit 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 bexar.org.

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

    Unincorporated Dimmit County: no county rule sets this, because Dimmit 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 bexar.org.

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

    Unincorporated Dimmit County: no county rule sets this, because Dimmit 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 bexar.org.

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

    Unincorporated Dimmit County: no county rule sets this, because Dimmit 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 bexar.org.

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

    Unincorporated Dimmit County: no county rule sets this, because Dimmit 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 bexar.org.

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

    Unincorporated Dimmit County: no county rule sets this, because Dimmit 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 bexar.org.

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

    Unincorporated Dimmit County: no county rule sets this, because Dimmit 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 bexar.org.

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

    Dimmit County OSSF activity reported in TCEQ's 2021 Authorized Agent data.

    • This evidence is historical 2021 activity data and does not establish current delegation as of 2026-09-11.
    • The source is a TCEQ activity report rather than the county's delegation order.
    “DIMMIT COUNTY (DIMMIT) 620229 10 0 0 0 0 10 0 0 0 0 0 0 0”
  • Agricultural exemptionConditional

    Agricultural open-space special appraisal for qualifying land in Dimmit County

    • The appraisal applies only to land, not improvements such as barns, storage tanks, and farm or ranch outbuildings.
    • Land must be currently devoted principally to agricultural use to the degree of intensity generally accepted in the area.
    • Land must generally have been devoted principally to agricultural use or timber production for five of the preceding seven years.
    • A 1-d-1 application is generally filed between January 1 and April 30; late filing and rollback-tax conditions apply as stated in the source.

    qualifying agricultural use history: 5 of preceding 7 years years · regular application period: January 1-April 30 (Late applications may incur a 10% penalty before appraisal records are approved.)

    “Agricultural valuation is a special use appraisal for land that is devoted primarily to agricultural production. It is not an exemption.”
  • Building in a floodplainLimited

    Development in Dimmit County's FEMA-designated flood hazard areas, including unincorporated county areas under the county's NFIP participation.

    • Dimmit County is listed as participating in the National Flood Insurance Program.
    • The county must maintain floodplain-management ordinances or orders necessary for NFIP eligibility.
    • The available official sources confirm NFIP floodplain regulation but do not identify the current Dimmit County permit application, fee schedule, or all activity-specific standards.
    • Municipal floodplain rules may apply within incorporated cities.

    NFIP participation status: participating · FEMA map status: All Zone A, C and X - Original FIRM by Letter

    “480789 DIMMIT COUNTY* [...] PARTICIPATING 10/01/07 Eloy F Rodriguez FLOODPLAIN ADMINISTRATOR”
  • County-wide zoningAbsent

    Texas counties may not adopt comprehensive zoning ordinances in unincorporated areas; no county zoning was found for Dimmit County.

    Bexar County FAQ — County zoning authority (Texas framework) ↗Scouted from the county site, not yet independently re-checked

Texas rules that apply here

  • Building permitLimited

    New residential construction in unincorporated areas of a Texas county that has adopted the required resolution or order under Local Government Code Chapter 233, Subchapter F.

    • The subchapter applies only if the county adopted a resolution or order requiring its application.
    • The county must be within 50 miles of an international border or have a population of more than 100.
    • It applies to new residential construction of a single-family house or duplex on a vacant lot, or an addition increasing the existing building's square footage or value by more than 50 percent.
    • The subchapter does not require prior county approval before construction begins.
    • Municipal building codes control in a municipality's extraterritorial jurisdiction.
    • The subchapter does not apply to structures constructed under Occupations Code Chapter 1201 or modular homes constructed under Chapter 1202.
    “Standards required under this subchapter apply only to new residential construction that begins after September 1, 2009. [...] This subchapter may not be construed to: (1) require prior approval by the county before the beginning of new residential construction;”
    One more reviewed finding on this topic
    • Limited — Industrialized housing or buildings installed in Texas, including purchasers or lessees acquiring a unit for their own or their company’s use.
      “A person who is a retailer of industrialized housing or buildings, or who is responsible for the assembly, connection, and on-site construction and erection of an industrialized house or building for persons other than themselves, must be registered as an industrialized builder. Subcontractors do not require the registration unless required by other applicable state laws. For example, electricians, HVAC contractors, and plumbers must be licensed in accordance with the applicable state law. If you are purchasing or leasing an industrialized house or building for your own use, or your company's use, you may file for an installation permit in lieu of registering as an industrialized builder.”
  • 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.”
    2 more reviewed findings on this topic
  • 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:”
  • InspectionsRequired

    New residential construction covered by Texas Local Government Code Chapter 233, Subchapter F.

    • The county must have adopted a resolution or order requiring application of the subchapter and satisfy the statutory geographic or population condition.
    • For construction on a vacant lot, at least three inspections are required: foundation before concrete, framing and mechanical systems before drywall or other interior wall covering, and completion.
    • For an addition to an existing residence, inspections are performed as necessary based on the scope of work.
    • The builder is responsible for contracting with an authorized inspector, including a licensed engineer, registered architect, Texas-licensed professional inspector, qualifying plumbing inspector, building inspector employed by a political subdivision, or ICC-certified residential combination inspector.
    • The builder may use the same inspector or different inspectors.

    minimum inspections for vacant-lot construction: >= 3 inspections

    “A person who builds new residential construction described by Section 233.153 shall have the construction inspected to ensure building code compliance in accordance with this section as follows: (1) for new residential construction on a vacant lot, a minimum of three inspections must be performed during the construction project”
  • Septic permitRequired

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

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

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

    “A permit and approved plan are required to construct, alter, repair, extend, and operate an OSSF.”
    2 more reviewed findings on this topic
    • Required — Construction, installation, alteration, extension, or repair of OSSFs in Texas, including Dimmit County.
      “A permit is required to construct, install, alter, extend, or repair an OSSF. Always check with your local permitting authority. Local permitting programs can be more stringent than State minimums.”
    • Required — Construction, installation, alteration, extension, or repair of an OSSF in Texas
      “A permit is required to construct, install, alter, extend, or repair an OSSF. [...] An OSSF may be exempt from permitting if it complies with all other requirements, including planning, construction, and installation standards of 30 TAC 285 AND meets the “10 acre rule”:”
  • Septic inspectionLimited

    OSSF installation and, where applicable, maintenance inspections in Texas

    • Authorized agents or their designated representatives inspect system installation.
    • Some permitting authorities impose more stringent requirements.
    • Maintenance-provider inspection and reporting requirements apply to systems and circumstances governed by 30 TAC §285.91(4).
    • Electronic monitoring may reduce reporting to every six months where the stated monitoring conditions apply.

    reduced maintenance reporting interval with qualifying electronic monitoring: 6 months (only where the system uses the specified electronic monitoring, automatic notification, and disinfection monitoring)

    “Many times, the AA has a "designated representative" (DR) to assist them with their responsibilities, which include reviewing plans for constructing, altering, extending or repairing each OSSF; issuing permits; and inspecting system installation. [...] If the system uses an electronic monitor, automatic radio or telephone to notify the maintenance provider of system or component failure and to monitor the amount of disinfection in the system, reporting may be reduced to every six months.”
    2 more reviewed findings on this topic
    • Limited — Inspections of OSSFs administered by an authorized agent in Texas, including any Dimmit County program if current delegation exists.
      “The authorized agent is responsible for the proper implementation of Texas Health and Safety Code, Chapter 366, 30 TAC Chapter 285, including reviewing OSSF permit applications, conducting inspections, investigating complaints, and more.”
    • Limited — OSSFs using secondary treatment or drip irrigation in Texas.
      “A system using secondary treatment or drip irrigation must be inspected by a valid maintenance company once every four months, or be maintained by the single family homeowner, where allowed.”
  • Off-grid sanitationLimited

    Use of an on-site sewage facility, including a septic system, for sewage disposal at a property in Dimmit County, Texas, subject to Texas statewide OSSF requirements.

    • A permit and approved plan are generally required to construct, alter, repair, extend, and operate an OSSF.
    • The local permitting authority must be checked because local permitting programs may be more stringent than state minimums.
    • A permit exemption may apply to a single-family dwelling on a tract of at least 10 acres only if all listed conditions are met: a qualifying site evaluation; no nuisance or groundwater pollution; all OSSF parts at least 100 feet from the property line; effluent disposed of on the property; and the single-family dwelling is the only dwelling on the tract.
    • The cited state materials do not establish that an OSSF may replace or bypass an available public-sewer connection; any applicable municipal, utility, subdivision, or other local connection requirement remains unresolved for Dimmit County.
    • Emergency repairs may be performed without a permit only if reported to the permitting authority in writing within 72 hours after repairs begin.
    • Boreholes, cesspools, and seepage pits are prohibited for installation or use.

    minimum tract size for listed permit exemption: >= 10 acres (single-family dwelling and all other exemption conditions must be met) · minimum OSSF separation from property line for listed permit exemption: >= 100 feet (all parts of the OSSF) · emergency-repair reporting deadline: <= 72 hours (after repairs have begun) · maximum cumulative flow for systems authorized under the cited OSSF subchapter: <= 5000 gallons per day (systems exceeding this threshold may require a permit under Texas Water Code Chapters 205 or 305)

    “A permit and approved plan are required to construct, alter, repair, extend, and operate an OSSF.”
    2 more reviewed findings on this topic
    • Limited — Composting toilets used as on-site sewage facility treatment systems in Texas.
      “Composting toilets will be approved by the executive director provided the system has been tested and certified under NSF International Standard 41 (1999) or under any other standards approved by the executive director.”
    • Limited — Off-grid wastewater sanitation through an OSSF in Texas.
      “An OSSF may be exempt from permitting if it complies with all other requirements, including planning, construction, and installation standards of 30 TAC 285 AND meets the “10 acre rule”:”
  • 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.”
  • Subdividing landRegulated (with conditions)

    Partition of land for residential development in the unincorporated portion of a Texas county, including Dimmit County, under Local Government Code Chapter 232

    • The cited Attorney General material describes county authority under Chapter 232 for residential development in unincorporated areas.
    • Applicability and required platting details depend on the specific Chapter 232 provisions and any applicable county regulations.
    • Municipal and extraterritorial-jurisdiction rules may apply instead where applicable.
    “Subdivision, a county may regulate as, the partition of land for a residential development in the unincorporated portion of the county under chapter 232”
  • Driveway accessRequired

    New or modified access driveways connecting property to a Texas state highway right of way.

    • A local public agency may receive access driveway permitting authority for state highways, but TxDOT approval remains required for drainage impacts on the state highway system before local approval.
    • No access driveway is permitted within a flared or widened right-of-way section at an intersection of a state highway with another highway, road, or street.
    • All entrances and exits, including radii, must be confined within the permittee's property frontage.
    • One-way 45-to-90-degree driveways are permitted for connections to one-way frontage roads or lane-divided highways; otherwise the driveway angle must be 75 to 90 degrees.
    • ADAAG and Texas Accessibility Standards apply.

    private residential driveway maximum width: <= 24 feet (Except as increased by permissible radii.) · driveway-to-pavement radius: >= 15 feet

    “A driveway must be constructed in accordance with a fully executed driveway permit”
    One more reviewed finding on this topic
    • Required — New or modified access driveways serving property abutting a state highway in Dimmit County, Texas.
      “A completed Permit Form 1058 is necessary whenever new access driveways are constructed or existing access driveways are modified.”
  • Permit processPublished (with conditions)

    Constructing a new driveway or revising an existing driveway on the right of way of a Texas state highway.

    • The applicant should contact the local District TxDOT office.
    • The applicant must submit Form 1058, Permit to Construct Access Driveway Facilities on Highway Right of Way.
    • The application must be for the bona fide purpose of securing or changing access to the owner's property, not parking or servicing vehicles on state highway rights of way.
    • No construction may begin on the right of way until a fully executed driveway permit is received and the applicant gives TxDOT 24-hour notification.
    • The driveway must comply with the executed permit and applicable regulations; TxDOT inspection must find construction satisfactory.
    • Where a local public agency has permitting authority, drainage impacts on the state highway system still require TxDOT approval before local approval.
    • Driveway geometrics, utilities, environmental requirements, wetlands considerations, ADAAG, TAS, and other applicable state and federal laws must be considered.

    required form: Form 1058, Permit to Construct Access Driveway Facilities on Highway Right of Way · advance notification: 24 hours (Notification to TxDOT is required before construction on the right of way.) · private residential driveway maximum width: <= 24 feet (Except as increased by permissible radii.) · minimum driveway radius to highway pavement: >= 15 feet

    “The applicant shall complete and submit to TxDOT a Form 1058”
    2 more reviewed findings on this topic
    • Published (with conditions) — OSSF applications for property in Dimmit County, Texas, under the statewide Texas permitting framework.
      “Applications and planning materials must be submitted to the permitting authority. To find your permitting authority, search by the county the OSSF is to be located. The TCEQ regional office will be the permitting authority in locations where a local jurisdiction has not been authorized.”
    • Published (with conditions) — Construction activity in Dimmit County that discharges stormwater to surface water and disturbs one or more acres of soil.
      “Construction activities are regulated under the CGP if they discharge stormwater to any surface water in the state and disturb an acre or more of soil.”
  • 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 Dimmit County

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

  • Local zoningPresent

    Zoning within the corporate limits of the City of Carrizo Springs, Dimmit County, Texas.

    • The official city council agenda identifies Appendix A of the City Code as a zoning ordinance and references zoning districts and area and height regulations.
    • The city also publishes an official page titled Zoning Map.
    “868 AN ORDINANCE AMENDING THE CITY OF CARRIZO SPRINGS, TEXAS, CODE OF ORDINANCES, APPENDIX A-ZONING ORDINANCE, SECTION X. AREA AND HEIGHT REGULATIONS FOR ALL DISTRICTS; R-1 RESIDENCE SINGLE-FAMILY MINIMUM LOT AREA; PROVIDING A SAVINGS CLAUSE; PROVIDING AN EFFECTIVE DATE; PROVIDING A SEVERABILITY CLAUSE; AND PROVIDING AN OPEN MEETINGS CLAUSE”
    One more reviewed finding on this topic
    • Present (with conditions) — Zoning controls administered by the City of Carrizo Springs.
      “Zoning Map City of Carrizo Springs - Zoning Map Supporting Documents zoning.map_.6.25.2024.jpg (29 MB)”

Still unanswered

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

  • Certificate of occupancy — Certificates of occupancy in Dimmit County.
  • Mandatory utility hookup — Water and sewer utility-connection requirements for property in Dimmit County.
  • Short-term rentals — Short-term rental use in Dimmit County
  • Permit fees — Dimmit County building-permit fees.

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 Dimmit County, Texas

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

Dimmit County scores 46/100 on the Bolthole Index, a marginal county profile. Its strengths: low administrative friction for a quiet rural property and manageable long-term carry cost. Watch-outs: thin water margin (20.5″/yr rainfall) and elevated mid-century heat, water, rain, or wildfire exposure.

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

Dimmit County does not require a county building permit for a home in unincorporated areas, and it has no county-wide zoning. Onsite septic is permitted by Dimmit County (TCEQ OSSF authorized agent) or TCEQ Region 16 if county is not an 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 Dimmit County?

Living in an RV on your own land in Dimmit County is allowed: Unincorporated Dimmit County: no county rule sets this, because Dimmit 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 bexar.org. Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits. Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters. A tiny home is allowed. Confirm with the county before relying on it.

How much does land cost in Dimmit County, Texas?

Land in Dimmit County runs about $1,777 per acre, based on the latest county data.

What is the water situation in Dimmit County?

Dimmit County gets about 20.5" of rain a year, with severe drought in roughly 29.7% of years.

How remote is Dimmit County?

A typical private-land location has about 4,673 people within 15 miles and 1,466,568 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Dimmit compares in Texas

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