Unincorporated DeWitt County, Texas has no general building permit or zoning ordinance; the county's own regulatory permits cover only septic systems and development inside flood hazard areas12. Septic (OSSF) permits are processed through the Victoria County Public Health Department as DeWitt County's designated agent, and cost $130 for a new installation34. Only 11.5% of the county's soils carry no severe limits for a conventional drain field, among the tighter shares of any rural Texas county, so test your soil before you buy5.
At a glance
- Building permit
- Not required in unincorporated DeWitt County; the county regulates only septic and floodplain development1
- Zoning
- No countywide zoning ordinance in unincorporated areas2
- Septic (OSSF) permit
- Required, $130 new-installation fee, processed via Victoria County Public Health Dept.4
- Floodplain development permit
- Required inside a Special Flood Hazard Area; fees run $200-$425 plus possible engineering fees67
- Driveway access (county road)
- Permit required if the entrance is on a county road and needs a 9-1-1 address8
- Water well
- Regulated by the Pecan Valley Groundwater Conservation District; non-exempt wells need a permit9
- Subdividing land
- Dividing a tract into 2+ parts needs Commissioners Court plat approval, with a 20-foot setback line on all sides of platted lots1011
- RV / tiny home / manufactured home
- No county zoning restriction on occupancy12
Who to call
Septic permits
Reviews OSSF (septic) permit applications, soil and site evaluations, and final inspections for DeWitt County; the DeWitt County permit fee itself is paid at the DeWitt County Judge's office in Cuero
2805 N Navarro, Victoria, TX 77901
Also useful
DeWitt County Judge's Office / Commissioners Court
Floodplain development permit applications, county-road driveway access permit applications, OSSF permit fee payment, and subdivision plat submissions to the Commissioners Court
307 N Gonzales St, Cuero, TX 77954 (DeWitt County Courthouse)
Well permits
Pecan Valley Groundwater Conservation District
Groundwater well permitting and well-spacing/production rules for DeWitt County
1009 N. Esplanade St., Cuero, Texas 77954
Contact details are copied from each office’s official page and were checked against it on September 24, 2026.
Do you need a building permit in DeWitt County, Texas?
No, not a general one. DeWitt County's own regulatory documents cover only two things: on-site sewage facilities and floodplain development, not a general residential building permit for unincorporated land1. That's consistent with Texas law: counties simply don't have the authority to require general building permits outside of a short list of special statutory situations that don't apply here2. Two things still trigger a county permit regardless of zoning: an OSSF (septic system) always needs one, and any structure built inside a mapped Special Flood Hazard Area needs a floodplain development permit46. None of this applies inside the City of Cuero, which has adopted its own 2021 International Building, Residential and related codes for construction within city limits13.
Who handles septic, floodplain and driveway permits in DeWitt County?
DeWitt County has no building department, so land buyers deal with a small set of specific offices instead of one general permit office. Septic (OSSF) applications, soil and site evaluations, and final inspections are handled by the Victoria County Public Health Department's Environmental Services division, which DeWitt County uses as its designated OSSF agent14. Floodplain development permits, county-road driveway access permit applications, subdivision plat submissions, and OSSF permit fee payments all route through the DeWitt County Judge's Office at the courthouse in Cuero15. If your build depends on a water well, the Pecan Valley Groundwater Conservation District, which covers all of DeWitt County, handles well permitting separately from the county16.
Does DeWitt County have zoning?
No countywide zoning ordinance applies to unincorporated DeWitt County2. Texas law only grants counties zoning power in narrow, specifically named situations, such as parts of Padre Island in Cameron or Willacy County, none of which cover DeWitt County, so this isn't a gap the county left open by choice12. That absence of zoning leaves minimum dwelling size, minimum lot size, lot coverage, building height, accessory dwellings, RV occupancy, temporary camping, tiny-home occupancy and manufactured-home occupancy all unrestricted at the county level12. The one place setbacks do apply is inside a platted subdivision: DeWitt County requires a 20-foot building and setback line on the front, sides and rear of every lot or divided part in a subdivision it approves11. That rule only reaches you if your land is being divided into two or more parts, which itself requires a plat approved by the Commissioners Court, subject to statutory exceptions such as agricultural-use divisions10.
How do septic permits work in DeWitt County?
DeWitt County is a TCEQ-authorized agent for OSSF permitting, but it routes the technical work through the Victoria County Public Health Department's Environmental Services division; applicants submit the full application there while the county-side fee is paid at the DeWitt County Judge's office in Cuero3. A new installation permit costs $130, and the permitting authority has up to 30 days to approve or deny it, though most applications are reviewed within a week; the resulting Authorization to Construct is only good for one year4. Once construction is done, you must give the health department at least 24 hours' notice before the required final inspection, and the system generally has to stay uncovered until it's approved17. Soil is the real gatekeeper here: only 11.5% of DeWitt County's soils carry no severe limits for a conventional drain field, so budget for an engineered system on most sites5. If you're buying 10 acres or more for a single-family home, ask about Texas's statewide 10-acre OSSF exemption, which can eliminate the permit requirement entirely if the system sits at least 100 feet from every property line, causes no nuisance or groundwater pollution, and the tract has no other dwelling on it18.
Can you live in an RV or tiny home on your land in DeWitt County?
As far as county zoning is concerned, yes. Because unincorporated DeWitt County has no zoning ordinance, RV occupancy, temporary camping, tiny-home occupancy and manufactured-home occupancy are all unrestricted at the county level12. That doesn't excuse sanitation: you still need an OSSF permit and an approved septic system, or a public sewer connection, before you can legally live on the parcel long-term144. If your land sits inside a mapped Special Flood Hazard Area, a floodplain development permit applies to placing a structure there regardless of what kind of dwelling it is6. If you're installing a factory-built modular or industrialized home rather than a conventional RV or tiny home, that's a separate track: Texas requires a residential installation permit and a passed final inspection before you can occupy it19.
Building a home in DeWitt County: the steps, in order
- Have your soil evaluated and apply for an OSSF permit through the Victoria County Public Health Department, or confirm you qualify for the state's 10-acre exemption before you skip it1418.
- Check whether your parcel falls inside a Special Flood Hazard Area, and if it does, apply for a floodplain development permit at the DeWitt County Judge's office before you build; expect fees between $200 and $425 depending on the structure, plus a possible $250-per-hour engineering review157.
- If your driveway will enter a county road and needs a 9-1-1 address, apply for a county driveway access permit; if it enters a state highway instead, file TxDOT Form 1058 with the district office820.
- If you're creating a new lot rather than building on an existing one, get your plat approved by the Commissioners Court, which requires a 20-foot setback line on every side of each platted lot1011.
- If you're installing a modular or industrialized home, file the $75 residential installation permit and make sure every required inspection is completed before you move in2119.
- Confirm your well plans with the Pecan Valley Groundwater Conservation District before you drill, since non-exempt wells need a district permit16.
What to check before you buy land in DeWitt County
Get a percolation test before you're under contract: with only 11.5% of county soils free of severe limits for a conventional drain field, a failed test can force an expensive engineered system or push you toward the 10-acre exemption instead518. Check whether the parcel sits in a Special Flood Hazard Area before you assume you can build without a permit6. Confirm road access and whether a driveway permit has already been issued, and separately confirm your well rights with the Pecan Valley Groundwater Conservation District, which regulates every well in the county16. DeWitt County sits about 63 miles from the nearest metro area, with 21.9 people per square mile, and the county runs dry: severe drought hits about 25.2% of years, well above the more humid Alabama and Georgia counties in this dataset222324. Property taxes run higher here than in many rural counties: the effective rate is about 0.9%, with a median annual bill around $1,4372526. Typical home values run around $224,110 and farmland averages about $3,823 an acre2728.
Watch-outs
- DeWitt County's own site does not explicitly state whether it has or lacks a general residential building permit outside the floodplain; the census answer reflects that Texas counties generally can't require one, not an explicit county statement, so confirm anything unusual (commercial use, four-plus-unit multifamily) directly with the County Judge's office1.
- The Victoria County Public Health Department is DeWitt County's official OSSF agent, not a misfiled out-of-county source; DeWitt County's own application packet directs applicants there, and the DeWitt County fee is still paid at the DeWitt County Judge's office in Cuero3.
- The 20-foot subdivision setback line only applies to platted lots the county approves; it does not by itself restrict setbacks on a single unsubdivided tract you buy and build on1112.
Sources
- DeWitt County - official site (Permits/Regulations/Applications) (2026 county census)
- DeWitt County - official site (Permits/Regulations/Applications) (2026 county census)
- DeWitt County permits, quoted and re-checked
- OSSF Application Packet, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Application for Permit to Develop in a Special Flood Hazard Area, quoted and re-checked
- De Witt County Floodplain Development Permit Fee Schedule, quoted and re-checked
- County Requirements & Regulations, quoted and re-checked
- Revised Management Plan, quoted and re-checked
- Subdivision and Manufactured Home Rental Community Regulations for DeWitt County, Texas, quoted and re-checked
- Subdivision and Manufactured Home Rental Community Regulations for DeWitt County, Texas, quoted and re-checked
- Texas law on county zoning and building authority
- Adopted Codes | Cuero, TX, quoted and re-checked
- Victoria County Public Health Department - Environmental Services (DeWitt County's OSSF designated agent) (vcphd.org)
- DeWitt County Judge's Office / Commissioners Court (co.dewitt.tx.us)
- Pecan Valley Groundwater Conservation District (pvgcd.org)
- OSSF Application Packet, quoted and re-checked
- Getting a Permit for an OSSF - Such as a Septic System (Texas statewide rule), quoted and re-checked
- IHB – Residential Installation Permit Application Instructions, quoted and re-checked
- Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
- IHB – Residential Installation Permit Application Instructions, quoted and re-checked
- Distance to the nearest metro area: Bolthole Index county data
- Population density: Bolthole Index county data
- Share of years in severe drought: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Typical home value (Zillow): Bolthole Index county data
- Farmland value per acre (USDA census): Bolthole Index county data
Written September 24, 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.