Ellis County, TX Building Permits, Zoning & Septic Rules

Unincorporated Ellis County, Texas has no legal authority to enforce a residential building code, inspect residential construction, or issue a residential certificate of occupancy¹. A county development permit is still required for any structure erected or placed on the property, or for excavation or grading, and separately, septic systems need a permit from the Ellis County Department of Development². Ellis County has no zoning in its unincorporated areas, though a fire code applies to commercial buildings, public buildings, and multifamily housing with four or more units³. Septic soils here are especially difficult: only 2.5% of the county's land is free of severe limitations for a conventional drain field⁴.

At a glance

Building permit: No residential building code, inspections, or certificate of occupancy in unincorporated areas; a county development permit is required for structures, excavation, or grading¹
Zoning: None in unincorporated areas³
Septic permits: Ellis County Department of Development; application, fee, and inspection required regardless of tract size²
Fire Code permit: Required for commercial buildings, public buildings, and multifamily dwellings of 4+ units; does not apply to an ordinary single-family home⁵
Minimum lot size: 1 acre with public water and septic; 2 acres with an individual well and individual septic⁶
Road setback: 25 feet from most county roads; 50 feet from Master Thoroughfare Plan or TxDOT-maintained roads⁷
Water well permit: Non-exempt wells need a Prairielands Groundwater Conservation District Operating Permit; wells at or under 17.36 gpm for domestic/livestock use are exempt⁸
Septic soil difficulty: Only 2.5% of county soils are free of severe limits for a conventional drain field⁴

Who to call

Septic permits

Ellis County Department of Development

Development permits for structures, excavation, and grading; OSSF (septic) permits and inspections; commercial development permitting and subdivision/development standards for unincorporated Ellis County

972-825-5200

[email protected]

302 N. Monroe St., Waxahachie, TX 75165

Floodplain permits

Ellis County Engineering Department

Floodplain maps and permitting, driveway culvert approvals, and infrastructure/civil-plan review for commercial and subdivision development in unincorporated Ellis County

972-825-5112

[email protected]

302 N. Monroe St., Waxahachie, TX 75165

Contact details are copied from each office’s official page and were checked against it on September 23, 2026.

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

Not a residential building-code permit. Ellis County's own notice states it lacks legal authority to regulate residential construction to conform to any building code, conduct residential construction inspections, or issue a residential certificate of occupancy in unincorporated areas outside city limits¹⁵. That's consistent with Texas law generally: counties only get residential building-code authority within 50 miles of an international border or with population over 100, and only if the county formally adopts a resolution or order, which Ellis County has not done for its general residential standards⁹. You still need a county development permit for any structure erected or placed on your property, or for excavation or grading, even though that's not a building-code review¹⁰. And Ellis County's Fire Code, adopted because the county is adjacent to a county over 250,000 in population, does require a construction permit, but only for commercial establishments, public buildings, and multifamily dwellings of four or more units, not an ordinary single-family home⁵⁹.

Who handles development, septic, and floodplain permits in Ellis County?

The Ellis County Department of Development is the office to call for a development permit (any structure, excavation, or grading) and for septic permits¹⁰¹¹. It's reachable at 302 North Monroe Street, Waxahachie, TX 75165, phone 972-825-5200, email [email protected], Monday through Friday 8 a.m. to 4:30 p.m.¹². For floodplain maps, flood-zone determinations, and driveway culvert approvals, the Engineering Department is at the same address, phone 972-825-5112, email [email protected]¹³. Commercial projects need both offices plus a separate Fire Marshal permit before construction can start¹⁴.

Does Ellis County have zoning?

No, unincorporated Ellis County has no zoning ordinance, and Texas law gives county zoning power only to a handful of specially designated areas, such as Padre Island beaches in Cameron or Willacy County and a few named lakes and military zones, none of which include Ellis County³¹⁵. Because there's no zoning, unincorporated Ellis County sets no minimum dwelling size, no lot-coverage limit, and no building-height limit, and RVs, tiny homes, and manufactured homes are unrestricted under county zoning rules¹⁶. That doesn't mean anything goes, though: county subdivision and development standards still set a minimum lot size of 1 acre where public water and septic are used, or 2 acres for an individual well and individual septic system, plus a 150-foot minimum paved-street frontage⁶. Buildings must also meet road setbacks of 25 feet from most county roads, or 50 feet from a road on the county's Master Thoroughfare Plan or a TxDOT-maintained road⁷. Accessory dwelling units are allowed on the same lot as a principal home, but the septic system must have enough certified capacity for both, and the accessory unit generally can't be sold or platted separately¹⁷.

How do septic permits work in Ellis County?

Every OSSF (on-site sewage facility) in unincorporated Ellis County needs an application, permit fee, and inspection from the Department of Development, regardless of the size of the tract¹¹¹². Every habitable structure must connect either to a central sanitary sewer system or to an approved septic system once construction is complete¹⁸. Soils here make this the most important thing to plan around: only 2.5% of Ellis County's land is free of severe limitations for a conventional drain field, among the more difficult septic counties in this dataset, so a professional site evaluation and likely an engineered system should be budgeted from the start⁴. Texas does offer a narrow statewide 10-acre exemption from OSSF permitting, but only if a licensed site evaluator or engineer confirms the conditions, the dwelling is the only one on the tract, all system parts stay at least 100 feet from the property line, and effluent stays on the property¹⁹. On anything smaller than that 10-acre threshold, or if any condition isn't met, permitting through the Department of Development is required before you build¹⁹¹¹. If you need a well, Ellis County sits inside the Prairielands Groundwater Conservation District, where non-exempt wells need an Operating Permit costing $1,000 plus a $500 registration fee, but a well used solely for domestic, livestock, or poultry use at or under 17.36 gallons per minute is exempt from that permitting⁸.

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

Unincorporated Ellis County has no zoning ordinance restricting how you occupy your own land, so temporary camping, tiny-home occupancy, and manufactured-home occupancy are unrestricted under county zoning rules there¹⁶. Ellis County's clearest RV rules govern organized RV parks, not individual private parcels: a regulated RV park needs an Infrastructure Development Plan, at least 150 feet of road frontage on a paved street with a 60-foot right-of-way, and limits each space to one residential unit, with permanent residences prohibited outside the park's own approved structures²⁰. That framework doesn't answer whether you can live in a single RV on your own land, and no official source reviewed for this guide specifically confirms that either way, so it stays an open question rather than a settled yes. If you're building any habitable structure, including one used as a full-time residence, remember it still needs an approved septic connection and a county development permit regardless of the zoning-based flexibility¹⁸¹⁰.

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

First, confirm your lot meets Ellis County's minimum lot-size and road-frontage standards: 1 acre with public water and septic, or 2 acres with an individual well and septic, plus 150 feet of paved-street frontage⁶. Second, order your septic site evaluation early given the county's difficult soils, then apply for your OSSF permit through the Department of Development before installing the system¹²⁴. Third, if you need a well beyond the domestic-use exemption, apply for an Operating Permit through the Prairielands Groundwater Conservation District⁸. Fourth, apply for your county development permit for the structure itself, and check with the Engineering Department whether your parcel is in a mapped floodplain¹⁰¹³. Fifth, if your driveway will connect to a state highway, apply through the local TxDOT district office using Form 1058, and give TxDOT 24-hour notice before construction begins²¹. Finally, build: there's no residential building-code review or inspection to schedule for an ordinary single-family home, unless you're building a commercial structure, public building, or four-or-more-unit multifamily building, which needs a separate Fire Code permit and final inspection before occupancy²²²³.

What to check before you buy land in Ellis County

Soils are the single biggest constraint here: only 2.5% of Ellis County's land is free of severe limitations for a conventional septic drain field, so a site evaluation should happen before you make an offer, not after⁴. The land is flat and easy to build on, with 100% at 15% slope or less, though only 19.4% is wooded, so don't expect tree cover for privacy or wind protection²⁴²⁵. Water availability runs about 40.1 inches of precipitation a year with severe drought in nearly one year in five (19.9%), so a well permitted through Prairielands deserves real budget²⁶²⁷⁸. Confirm the parcel meets the county's minimum lot size and road-frontage rules before you assume it's buildable, since 1- or 2-acre minimums and 150 feet of paved frontage apply outside city limits⁶. Check FEMA flood maps with the Engineering Department, since Ellis County participates in the National Flood Insurance Program and has adopted its own Flood Damage Prevention Order²⁸. Ellis County has some of the higher carrying costs in this dataset: an effective property tax rate near 1.5% and a median annual bill around $4,472, against a typical home value around $375,985²⁹³⁰³¹.

Watch-outs

Ellis County's own notice states it has no legal authority to inspect residential construction or issue a residential certificate of occupancy in unincorporated areas; don't assume a lender, insurer, or future buyer won't still want their own inspection²².
No official source confirms whether living in a single RV on your own unincorporated Ellis County land is allowed or restricted; the county's RV rules address organized RV parks, not individual parcels²⁰.
Ellis County's soils are especially difficult for septic, with only 2.5% free of severe limitations for a conventional drain field; get a site evaluation before you buy, not after⁴.

Sources

Written September 23, 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.

How Ellis County scores

Seclusion18100% ev.

Self-Sufficiency42100% ev.

Admin Boringness8490% ev.

Durability63100% ev.

Property Autonomy71100% ev.

Carry Cost67100% 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 →

$376kTypical home

1.5%Property tax

$5,374Land / acre

40.1"Annual rain

19.9% of yrsSevere drought

45.6 / yr (+29.7)Mid-century 100°F days

24.4 daysMid-century dry spell

2.47" (+5.8%)Mid-century 1-day rain

1.38×Wildfire change factor

100%Forward climate coverage

$2,257Home insurance / yr

-0.3% / yrInsurance growth

0%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

56,172People within 30 min

9,583,217People within 2 hr

106,335Radius comparison (15 mi)

238.1People / sq mi

1.6%Federal land

100%Land at 15% slope or less

2.5%Septic soil without severe limits

13,903 acWorkable land screen

19.4%Wooded land

14.4 tonsBiomass / forest ac

66.3°FAvg temp

Answers from the rulebook for Ellis County

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

Ellis County rules

Building permitRequired
Construction or substantial improvement subject to the Ellis County Fire Code in the unincorporated areas of Ellis County.
- A permit must be secured before construction or substantial improvement.
- Substantial Improvement includes a change in occupancy classification involving a change in the purpose or level of activity in a building.
- Applicants must submit a completed Building Permit Application, construction plans, site plans, and a permit fee under Section 8.3, Table I of the Fire Code.
- Additional fees may apply.
- The approved permit must remain at the construction site and be visible from the roadway.
- This Fire Marshal requirement does not establish a general residential building-code permit requirement; the county's January 20, 2022 notice states that Ellis County has not adopted the applicable residential building-code resolution or order.
“No person shall perform or authorize Construction or Substantial Improvement within the unincorporated areas of Ellis County without first securing a permit.”
Construction Building Permit Application and Permit Information Sheet ↗Re-checked Sep 11, 2026
One more reviewed finding on this topic
- Limited — Structures erected or placed on property, and excavation or grading, in the unincorporated areas of Ellis County.
  “As a general reminder, Ellis County requires development permits for any structure(s) erected or placed on the property or for any excavation/grading.”
  Notice Regarding Inspections & Certificates of Occupancy in the Unincorporated Areas of Ellis County ↗Re-checked Sep 11, 2026
Building code adoptedPartial
Building-code and fire-code regulation in unincorporated Ellis County.
- Ellis County has not adopted a resolution or order requiring Texas Local Government Code Section 233, Subchapter F residential building-code standards for unincorporated areas, according to the county's January 20, 2022 notice.
- The county notice states that Ellis County lacks legal authority to regulate residential construction to conform to any building code, conduct residential construction inspections, or issue a residential certificate of occupancy in unincorporated areas outside city limits.
- Separately, the Ellis County Fire Code applies to public buildings, commercial establishments, and multifamily dwellings with four or more units in unincorporated areas.
- The Fire Code was adopted November 26, 2012, effective January 1, 2013, and revised November 1, 2020.
- For covered construction or substantial improvement, a permit is required before work begins; substantial improvement includes work exceeding 50% of the building's county-appraised value for the preceding year, subject to the code's stated historic-building exception.
multifamily dwelling threshold: >= 4 units · substantial improvement threshold: > 50 percent of county-appraised building value (The code separately states that its construction-related provisions are not mandatory for qualifying historic buildings that do not constitute a distinct hazard, with fire protection provided under an approved fire protection plan.)
“This Code shall apply to public buildings, commercial establishments, and multi-family dwellings with four or more units for which Construction or Substantial Improvement, as defined in this Code, begins after the effective date of this Fire Code. This Code applies in unincorporated areas of Ellis County, Texas after the effective date of this Code.”
Notice Regarding Inspections & Certificates of Occupancy in the Unincorporated Areas of Ellis County ↗Re-checked Sep 11, 2026
InspectionsRequired
Construction subject to the Ellis County Fire Code in the unincorporated areas of Ellis County.
- The applicant agrees that the Fire Code Official may make as many scheduled and unscheduled inspections as deemed necessary to enforce the Fire Code.
- When construction is complete and the building is ready to be occupied, the applicant must request a final inspection.
- The building cannot be occupied until it has passed a final inspection and received a Certificate of Compliance.
“When the construction process is completed and the building is ready to be occupied, please call and request to set up a “Final Inspection”. A building cannot be occupied until it has passed a final inspection and received a Certificate of Compliance.”
Construction Building Permit Application and Permit Information Sheet ↗Re-checked Sep 11, 2026
One more reviewed finding on this topic
- Not required — Residential construction inspections by Ellis County in the unincorporated areas of Ellis County, including plumbing, framing, electrical, HVAC, and roofing inspections.
  “This means that Ellis County does not have the legal authority to perform any of the items listed below: [...] • Conduct residential construction inspections (i.e., plumbing, framing, electrical, HVAC, roofing, etc.),”
  Notice Regarding Inspections & Certificates of Occupancy in the Unincorporated Areas of Ellis County ↗Re-checked Sep 11, 2026
Certificate of occupancyNot required
Residential Certificates of Occupancy issued by Ellis County for properties in the unincorporated areas of Ellis County, outside city limits.
- The source notice is dated January 20, 2022.
- The county notice refers specifically to a residential Certificate of Occupancy; it does not determine municipal certificate requirements inside city limits or other certificates issued by another authority.
- For Fire Code construction, the Fire Marshal application instead refers to a Certificate of Compliance, not a residential Certificate of Occupancy.
“This means that Ellis County does not have the legal authority to perform any of the items listed below: [...] • Issue a residential Certificate of Occupancy on properties in the County's unincorporated areas (outside of any city limits).”
Notice Regarding Inspections & Certificates of Occupancy in the Unincorporated Areas of Ellis County ↗Re-checked Sep 11, 2026
Zoning districts · by state lawNo county rule
Unincorporated Ellis County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Ellis County has no zoning ordinance. The county legal census found no county zoning ordinance, citing ellispermits.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Minimum dwelling size · by state lawNo county rule
Unincorporated Ellis County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Ellis County has no zoning ordinance. The county legal census found no county zoning ordinance, citing ellispermits.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Minimum lot sizeSpecified
Property intended for development outside municipal limits in Ellis County, including platted and unplatted property.
- Public water supply plus OSSF requires at least one acre.
- An individual water well plus individual OSSF requires at least two acres, or an amount approved by Prairielands Groundwater Conservation District, and requires compliance with County OSSF and road-frontage requirements.
- Lots not using OSSF and served by approved sewer or an approved special-purpose district are governed by Section V.
- Divided property must front directly onto a public road or street.
- Minimum paved public-street frontage is 150 feet, or 50 feet measured by chord for qualifying cul-de-sac lots.
minimum lot size with public water and OSSF: >= 1 acre (in accordance with the adopted Septic Order) · minimum lot size with individual well and individual OSSF: >= 2 acres (or as approved by Prairielands Groundwater Conservation District) · minimum paved public street frontage: >= 150 feet (cul-de-sac lots may use 50 feet measured by chord)
“shall have a minimum lot size of one (1) acre”
Ellis County Quality Growth Initiatives, Volume I: Subdivision & Development Standards ↗Re-checked Sep 11, 2026
SetbacksSpecified
Buildings and portions of buildings on lots or properties outside municipal limits that abut roads covered by Ellis County standards.
- Roads not on the County Master Thoroughfare Plan or less than 100 feet wide require 25 feet from the edge of right-of-way or property line.
- Roads on the Master Thoroughfare Plan that are at least 100 feet wide, or roads maintained by TxDOT, require 50 feet.
- Properties with two or more adjacent roads require a secondary 25-foot setback on additional roads, outside required easements.
- Road classifications determine setback lines at permitting; the Director resolves discrepancies, subject to appeal to Commissioners’ Court.
- Setbacks may overlap easements except septic-related setbacks under 30 TAC 285.
setback from road edge or property line: 25 feet (roads not on the Master Thoroughfare Plan or less than 100 feet wide) · setback from road edge or property line: 50 feet (Master Thoroughfare Plan roads at least 100 feet wide or TxDOT-maintained roads) · secondary setback on additional adjacent roads: 25 feet (provided it is outside any required easement)
“setback distance of twenty-five (25) feet”
Ellis County Quality Growth Initiatives, Volume I: Subdivision & Development Standards ↗Re-checked Sep 11, 2026
Lot coverage · by state lawNo county rule
Unincorporated Ellis County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Ellis County has no zoning ordinance. The county legal census found no county zoning ordinance, citing ellispermits.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Building height · by state lawNo county rule
Unincorporated Ellis County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Ellis County has no zoning ordinance. The county legal census found no county zoning ordinance, citing ellispermits.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Living in an RVLimited
Occupancy of individual spaces in recreational vehicle parks regulated by Ellis County.
- The development must satisfy applicable state or federal permits before submission of the Infrastructure Development Plan or civil plans.
- Applications submitted after January 1, 2018 require an Infrastructure Development Plan or complete civil plans as directed by the County Engineer, with drawings sealed by a Texas-licensed professional engineer.
- The park must be adjacent to a public paved street with a minimum 60-foot right-of-way and have at least 150 feet of road frontage; platting requirements may also apply.
- Interior roads must satisfy the stated paving, fire-lane, weight-load, no-shared-driveway, and perimeter-access rules; an exception applies for an individually platted lot with an approved precinct culvert, with culvert installation the owner's responsibility.
- No space may contain more than one residential unit.
- The County may use the latest NFPA 1194 standard to review the proposal.
- Permanent fixtures and permanent residences are prohibited on individual spaces, except that community or amenity centers, pools, restrooms, management buildings, and other common-space structures are not included in that prohibition.
- The development must comply with applicable County infrastructure, floodplain, septic, subdivision, drainage, and construction regulations.
- The Infrastructure Development Plan expires one year after approval if construction activity has not begun; permits are withheld until the plan is approved and completed, and construction or installation may not begin before plan approval.
minimum public street right-of-way: >= 60 feet · minimum road frontage: >= 150 feet · residential units per RV-park space: <= 1 unit · Infrastructure Development Plan approval deadline: <= 60 days (The County Engineer shall approve or reject the plan in writing.) · Infrastructure Development Plan expiration: 1 year (Applies if there has been no construction activity after initial approval.)
“no space may contain more than one (1) residential unit.”
Ellis County Quality Growth Initiatives – Volume I (Subdivision & Development Standards) ↗Re-checked Sep 11, 2026
Camping on your land · by state lawNo county rule
Unincorporated Ellis County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Ellis County has no zoning ordinance. The county legal census found no county zoning ordinance, citing ellispermits.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Tiny homes · by state lawNo county rule
Unincorporated Ellis County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Ellis County has no zoning ordinance. The county legal census found no county zoning ordinance, citing ellispermits.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Manufactured homes · by state lawNo county rule
Unincorporated Ellis County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Ellis County has no zoning ordinance. The county legal census found no county zoning ordinance, citing ellispermits.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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Accessory dwellingsAllowed (with conditions)
Accessory habitable structures or accessory dwelling units on the same lot as a principal dwelling in unincorporated Ellis County.
- The accessory structure must meet applicable County requirements or already be legally platted.
- The approved septic system must have enough capacity, and the accessory structure must meet other applicable regulations.
- The OSSF application must be submitted at the same time as the development permit for the additional accessory habitable structure.
- A registered sanitarian or professional engineer must certify that sufficient capacity and disposal area exist and that the proposal conforms to the adopted Septic Order.
- The accessory structure may not be sold independently or platted separately from the principal habitable structure unless it meets the applicable lot and septic requirements, including a separate independent system if connected to another.
- The County definition states that detailed plans are required at permitting and that ADUs are not intended for separate sale or long-term rental.
“Accessory habitable structures may be allowed on the same lot”
Ellis County Quality Growth Initiatives – Volume I (Subdivision & Development Standards) ↗Re-checked Sep 11, 2026
Who permits septicCounty
OSSF/septic systems in the unincorporated areas of Ellis County, Texas.
- The county rules do not apply to areas regulated under an existing Order, Ordinance, or Resolution.
- The county rules do not apply where a current and approved interlocal agreement exists with another governmental entity.
- The rules incorporate Texas Health and Safety Code Chapters 366 and 367, Texas Water Code Chapters 7, 26, and 37, and 30 TAC Chapters 30, 70, and 285.
- The county may impose more stringent requirements than 30 TAC Chapter 285.
“This Order shall apply to all the areas lying within the unincorporated areas of Ellis County, Texas, except for the areas regulated under an existing Order, Ordinance, or Resolution, or in areas where a current and approved interlocal agreement exists with that governmental entity.”
Order Adopting Rules of Ellis County, Texas, for On-Site Sewage Facilities ↗Re-checked Sep 11, 2026
Septic permitRequired
Construction, alteration, extension, or repair of residential or commercial OSSFs in the unincorporated areas governed by the Ellis County OSSF Order.
- Ellis County requires an application, permit fee, and inspection regardless of tract size.
- An application and permit must be obtained from the Ellis County Department of Development or another department authorized by the Commissioners Court.
- For structures using OSSFs for sewage disposal, the application and permit must be obtained before construction.
- The rule excludes areas regulated under an existing Order, Ordinance, or Resolution and areas covered by a current approved interlocal agreement.
tract size threshold: regardless of the size of the tract of land
“Ellis County shall require an application, permit fee, and inspection for construction, alteration, extension, or repair to a residential or commercial on-site sewage facility, regardless of the size of the tract of land.”
Order Adopting Rules of Ellis County, Texas, for On-Site Sewage Facilities ↗Re-checked Sep 11, 2026
Off-grid sanitationLimited
Use of an approved on-site sewage disposal system instead of central sanitary sewer for habitable structures in the Ellis County OSSF jurisdiction.
- Off-grid sanitation is limited to an approved sewage disposal system complying with the Ellis County OSSF Order.
- An OSSF application, permit fee, and inspection are required for construction, alteration, extension, or repair of a residential or commercial OSSF regardless of tract size.
- For structures using OSSFs, the application and permit must be obtained before construction.
- The order's exceptions for areas regulated under an existing Order, Ordinance, Resolution, or current approved interlocal agreement apply.
“Upon their completion, all habitable structures shall be connected to either a central wastewater treatment sanitary sewer system or an approved sewage disposal system.”
Order Adopting Rules of Ellis County, Texas, for On-Site Sewage Facilities ↗Re-checked Sep 11, 2026
Well permitLimited
Water wells in Ellis County, which is within the Prairielands Groundwater Conservation District.
- All non-exempt wells require a permit.
- Existing non-exempt wells with approved registration before January 1, 2019 obtain a Historic Use Permit.
- New non-exempt wells obtain an Operating Permit.
- A new non-exempt well requires an Operating Permit before drilling or operating.
- New exempt wells are exempt from permitting, fee payment, metering, and reporting only if used solely for domestic, livestock, or poultry use and designed production capacity is 17.36 gallons per minute or less.
- Any new well must still be registered with the District before drilling and comply with the two-acre minimum tract-size and spacing requirements.
- Non-exempt Operating Permit applications require a $1,000 per-well permit fee, a $500 non-refundable registration fee, and five-year renewal with a $150 per-well fee, according to the District's official resource page.
exempt well maximum designed production capacity: <= 17.36 gallons per minute (Only when used solely for domestic, livestock, or poultry use.) · minimum tract size for new wells: >= 2 acres (Subject to applicable variance or exception rules.) · non-exempt operating permit fee: 1000 USD per well · well registration fee: 500 USD per well (Non-refundable.) · operating permit renewal period: 5 years · operating permit renewal fee: 150 USD per well
“Beginning January 1, 2019, you must apply for and obtain an Operating Permit prior to drilling or operating a new, non-exempt well. Non-exempt wells are used for purposes other than domestic, livestock, or poultry use. The well owner will need to submit a well registration form, a $500 non-refundable registration fee, and an application for an Operating Permit with a fee of $1,000 per well. All permits must be renewed every 5 years with a $150 per well fee.”
Well Permits ↗Re-checked Sep 11, 2026
Mandatory utility hookupConditional
Habitable structures in the Ellis County OSSF jurisdiction.
- Upon completion, every habitable structure must connect either to a central wastewater treatment sanitary sewer system or to an approved sewage disposal system.
- The requirement applies within the county OSSF jurisdiction and remains subject to the order's exceptions for existing local orders, resolutions, ordinances, and approved interlocal agreements.
“Upon their completion, all habitable structures shall be connected to either a central wastewater treatment sanitary sewer system or an approved sewage disposal system.”
Order Adopting Rules of Ellis County, Texas, for On-Site Sewage Facilities ↗Re-checked Sep 11, 2026
Building in a floodplainLimited
Development in Ellis County floodplain areas subject to the county's floodplain management regulations.
- The official page does not reproduce the complete Flood Damage Prevention Order or its detailed permit procedures; project-specific requirements must be confirmed with the Engineering Department.
- The county page directs residents to the Engineering Department for maps, building requirements, floodway information, flood-zone determinations, and related flood information.
“As a participating community, the County has adopted Floodplain Management practices through the Ellis County Flood Damage Prevention Order.”
FEMA Floodplain Information ↗Re-checked Sep 11, 2026
Permit processPublished (with conditions)
Commercial development permitting in unincorporated Ellis County.
- A pre-application meeting with Department of Development staff is required.
- Engineering Department approval and separate Fire Marshal permitting are required before construction starts.
- A completed application, 9-1-1 address application, driveway culvert application, site plan, floor plan, proof of legal ownership, applicable TxDOT culvert permit, and paid fee are required as applicable.
- Applications will not be accepted if required items are incomplete.
- The application states it is effective June 16, 2025.
“Construction cannot begin without approval from the Ellis County Engineer’s Office and separate permits from both the Department of Development and Fire Marshal’s Office.”
Commercial Development Permit Application Checklist ↗Re-checked Sep 11, 2026
County-wide zoningAbsent
County states plainly there is no zoning in the unincorporated areas of Ellis County, though certain development/business orders apply.
Ellis County Department of Development - Regulations ↗Scouted from the county site, not yet independently re-checked

Texas rules that apply here

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.”
Basics for Septic Systems ↗Re-checked Sep 12, 2026
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”
Section 4: Driveway Permits, Design, and Materials ↗Re-checked Sep 12, 2026
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.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
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.”
Local Government Code Chapter 233, County Regulation of Housing and Other Structures ↗Re-checked Sep 21, 2026

Still unanswered

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

Owner-builder exemption — Any Ellis County exemption allowing an owner-builder to avoid otherwise applicable county building, development, or Fire Code permit requirements.
Short-term rentals — Short-term rental use in unincorporated Ellis 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.

Water rights & wells in Ellis County

Whether a new home can legally get its own water here — the sub-state groundwater regime, from Texas’s water agency.

Actively managed

This basin is under active state management — new water use is scrutinized, though a domestic well is usually still allowed.

Household wellExempt up to a limit

Texas groundwater is governed by the rule of capture; a Groundwater Conservation District must exempt qualifying domestic/livestock wells and may not restrict their production, but well registration and spacing rules can still apply and the exemption does not cover wells serving a platted subdivision.

Limit: Domestic/livestock well exempt from GCD production permitting if on a tract >10 acres AND incapable of producing >25,000 gal/day (Tex. Water Code §36.117)

Texas Water Code §36.117 / TWDB ↗

North-Central Texas Trinity & Woodbine Aquifers Priority Groundwater Management Areapartial of county
TCEQ-designated DFW-region Trinity/Woodbine critical-groundwater area; drives GCD coverage. Domestic/livestock wells remain exempt but spacing/registration may apply.
TCEQ — Priority Groundwater Management Areas ↗

Hybrid state (appropriation + riparian). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the Texas state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.

Living off-grid in Ellis County, Texas

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

Ellis County scores 48/100 on the Bolthole Index, a solid county profile. Its strengths: low administrative friction for a quiet rural property and a stronger property-autonomy legal backdrop. Watch-outs: about 56,172 people within a 30-minute drive and workable self-sufficiency basics (40.1″/yr rainfall).

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

Ellis 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 Ellis County Department of Development. 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.

How much does land cost in Ellis County, Texas?

Land in Ellis County runs about $5,374 per acre, based on the latest county data.

What is the water situation in Ellis County?

Ellis County gets about 40.1" of rain a year, with severe drought in roughly 19.9% of years. On water rights, Ellis County lies in the North-Central Texas Trinity & Woodbine Aquifers Priority Groundwater Management Area — TCEQ-designated DFW-region Trinity/Woodbine critical-groundwater area; drives GCD coverage. Domestic/livestock wells remain exempt but spacing/registration may apply..

How remote is Ellis County?

A representative private-land location has about 56,172 people within a 30-minute drive and 9,583,217 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.

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

At a glance

Who to call

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

Who handles development, septic, and floodplain permits in Ellis County?

Does Ellis County have zoning?

How do septic permits work in Ellis County?

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

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

What to check before you buy land in Ellis County

Watch-outs

Sources

Ellis County in Texas

How Ellis County scores

Find land. Bring the promising ones back.

Parcel due diligence

Answers from the rulebook for Ellis County

Ellis County rules

Texas rules that apply here

Still unanswered

Water rights & wells in Ellis County

Living off-grid in Ellis County, Texas

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

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

How much does land cost in Ellis County, Texas?

What is the water situation in Ellis County?

How remote is Ellis County?

How Ellis compares in Texas