Cass County, TX Building Permits, Zoning & Septic Rules

Q: Does Cass County, Texas have zoning?

Unincorporated Cass County has no county zoning ordinance. Because the county lacks zoning authority for these topics, county zoning sets no minimum dwelling size, minimum lot size, setback, lot-coverage limit, building-height limit or zoning district, and it does not restrict accessory dwellings, RV occupancy, tiny-home occupancy or temporary camping. That answer is limited to county rules on unincorporated land; property inside a city can face municipal rules. Platting is also separate from zoning. A division outside municipal limits into multiple parts for lots, streets, alleys, parks or other public-use areas generally requires a recorded plat, subject to statutory exceptions. Qualifying agricultural, farm, ranch, wildlife-management or timber-production divisions may be exempt while that use continues and the other conditions are met.

Unincorporated Cass County, Texas does not require a general building permit for an ordinary home, and the county does not have a zoning ordinance¹²³. Septic is separate: Cass County is the TCEQ-authorized agent, while the Northeast Texas Municipal Water District serves as its designated representative and takes OSSF applications⁴⁵. Land divisions may also require a county-approved plat⁶.

At a glance

Building permit: No general building permit for an ordinary home in unincorporated Cass County¹
Zoning: No county zoning ordinance for unincorporated land²³
Septic permits: Cass County is the authorized agent; NETMWD is the designated representative and accepts applications⁴⁵
RV and tiny-home living: No county zoning rule restricts it on unincorporated land³
Minimum size and setbacks: No county zoning minimum dwelling size, lot size or setback³
Owner-builder: No county-specific exemption was confirmed; the general building-permit program does not apply⁷¹
Subdivision plat: Some divisions outside city limits require a plat; agricultural and other exceptions may apply⁸⁹
Septic soil difficulty: Only 12% of county soils avoid severe limits for a conventional drain field¹⁰

Who to call

Also useful

Cass County Clerk

County records and filing questions for subdivision plats

(903) 756-5071

100 E. Houston Street, Linden, TX 75563

Septic permits

Northeast Texas Municipal Water District Onsite Septic Program

Serves as designated representative for the TCEQ OSSF program in Cass County and accepts septic applications and fees

(903) 639-7538

4180 FM 250 South, Hughes Springs, TX 75656

Contact details are copied from each office’s official page and were checked against it on September 28, 2026.

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

Unincorporated Cass County does not require a general building permit for an ordinary home¹. Texas law gives counties only limited building authority, including a possible fire-code program for specified commercial, public and larger multifamily buildings and residential standards adopted by an eligible county through a resolution or order¹¹. We could not confirm that Cass County has adopted such an order, or that it issues certificates of occupancy or conducts general building inspections. Ask the County Judge's office about an unusual commercial or multifamily project before construction. Separate approvals can still matter: an OSSF normally needs a permit, some land divisions require a subdivision plat, and a new or modified driveway on state highway right of way requires TxDOT approval¹²⁸¹³.

Who handles permits in Cass County, Texas?

Cass County does not list a general building or permit department for ordinary residential construction in its unincorporated area¹. For septic, Cass County is the TCEQ-authorized agent, and the Northeast Texas Municipal Water District serves as the designated representative for Cass County's OSSF program⁴⁵. NETMWD tells applicants building a water-using structure, or repairing or replacing a septic system, to submit the completed application and fee to the district first⁵. The published single-family septic permit fee is $360⁵. For a land division, contact the Cass County Clerk about filing an approved plat¹⁴¹⁵. A driveway connecting to a Texas state highway goes through the local TxDOT district office rather than a general county building office¹⁶.

Does Cass County, Texas have zoning?

Unincorporated Cass County has no county zoning ordinance²³. Because the county lacks zoning authority for these topics, county zoning sets no minimum dwelling size, minimum lot size, setback, lot-coverage limit, building-height limit or zoning district, and it does not restrict accessory dwellings, RV occupancy, tiny-home occupancy or temporary camping³. That answer is limited to county rules on unincorporated land; property inside a city can face municipal rules. Platting is also separate from zoning. A division outside municipal limits into multiple parts for lots, streets, alleys, parks or other public-use areas generally requires a recorded plat, subject to statutory exceptions⁸. Qualifying agricultural, farm, ranch, wildlife-management or timber-production divisions may be exempt while that use continues and the other conditions are met⁹.

How do septic permits work in Cass County, Texas?

A permit and approved plan are normally required to construct, install, alter, extend, repair or operate an OSSF in Cass County¹⁷¹². Cass County is the authorized agent, and NETMWD serves as the designated representative that receives applications and fees⁴⁵. The permitting authority must approve or deny a complete application within 30 days, and an installer must give at least five working days' notice before the system is ready for inspection¹⁷¹⁸. Only 12% of Cass County soils avoid severe limitations for a conventional drain field, so arrange the site evaluation before settling on a house location¹⁰. A narrow 10-acre exemption can apply to one single-family dwelling only when every listed condition is met, including a licensed evaluation, at least 100 feet between every OSSF component and the property line, no nuisance or groundwater pollution, and on-property effluent disposal¹².

Can you live in an RV or tiny home in Cass County, Texas?

County zoning does not restrict RV living, tiny-home living or temporary camping on your own unincorporated Cass County land, and county zoning sets no minimum dwelling or lot size³. That does not erase septic requirements: a water-using structure that is not on city sewer may require an OSSF application through NETMWD, and an OSSF normally needs a permit and approved plan⁵¹⁷. Manufactured homes have an additional statewide rule. An uninstalled manufactured home may not be occupied except for viewing on a retailer's sales lot, and installed manufactured housing remains subject to state standards¹⁹. We could not confirm a Cass County certificate-of-occupancy rule, so ask the County Judge's office before relying on an RV or temporary structure during a build. Inside a municipality, ask that city because municipal rules can differ from county rules.

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

First, confirm that the parcel is outside city limits before relying on the county answers in this guide. Second, if the parcel is being divided, ask the Cass County Clerk whether a plat is required; the county process calls for a preliminary plat 15 days before Commissioners Court, with a $5 submittal fee, and preliminary approval expires after 12 months⁶¹⁵. Third, arrange an early septic site evaluation because only 12% of county soils avoid severe conventional-drain-field limits¹⁰. Fourth, submit the OSSF application and fee to NETMWD before septic work begins unless every condition of a state exemption is satisfied⁵¹². Fifth, if access meets a state highway, submit Form 1058 to TxDOT and wait for the executed permit before work in the right of way¹⁶. Finally, proceed with the home knowing no general county building permit applies, but ask the County Judge about any unusual occupancy, commercial or multifamily issue¹¹¹.

What should you check before buying land in Cass County?

Start with septic feasibility: only 12% of Cass County soils avoid severe limitations for a conventional drain field, so a site evaluation can change both the usable building area and the budget¹⁰. Private-well regulation depends on whether the parcel lies in a groundwater conservation district; Texas does not impose statewide well registration outside such districts, but a new well still requires a State of Texas Water Well Report²⁰. Check legal access and determine whether a driveway will enter a state highway, because that connection requires a TxDOT permit¹³. Cass County is 78.2% wooded and 99.5% of its land is at a slope of 15% or less, making clearing and drainage more immediate concerns than steep terrain on many tracts²¹²². The typical effective property-tax rate is about 1.1%, and the median annual bill is about $1,419²³²⁴.

Watch-outs

Cass County is the TCEQ-authorized septic agent, but NETMWD is the designated representative that receives OSSF applications and fees; contact NETMWD first⁴⁵.
We could not confirm a Cass County building-inspection or certificate-of-occupancy rule, so ask the County Judge's office before an unusual project¹.
An uninstalled manufactured home cannot be occupied except for viewing on a retailer's sales lot¹⁹.

Sources

Written September 28, 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 Cass County scores

Seclusion61100% ev.

Self-Sufficiency70100% ev.

Admin Boringness8290% ev.

Durability58100% ev.

Property Autonomy71100% ev.

Carry Cost79100% 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 →

$162kTypical home

1.1%Property tax

$3,571Land / acre

50.3"Annual rain

16.7% of yrsSevere drought

31.2 / yr (+24.1)Mid-century 100°F days

20.3 daysMid-century dry spell

2.45" (+6.4%)Mid-century 1-day rain

1.45×Wildfire change factor

100%Forward climate coverage

$2,038Home insurance / yr

-0.3% / yrInsurance growth

0%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

20,474People within 30 min

1,558,001People within 2 hr

20,484Radius comparison (15 mi)

30.6People / sq mi

5.3%Federal land

99.5%Land at 15% slope or less

12%Septic soil without severe limits

68,512 acWorkable land screen

78.2%Wooded land

37.9 tonsBiomass / forest ac

64.7°FAvg temp

Answers from the rulebook for Cass County

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

Cass County rules

Zoning districts · by state lawNo county rule
Unincorporated Cass County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Cass County has no zoning ordinance. The county legal census found no county zoning ordinance, citing co.cass.tx.us.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
- For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Minimum dwelling size · by state lawNo county rule
Unincorporated Cass County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Cass County has no zoning ordinance. The county legal census found no county zoning ordinance, citing co.cass.tx.us.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
- For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Minimum lot size · by state lawNo county rule
Unincorporated Cass County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Cass County has no zoning ordinance. The county legal census found no county zoning ordinance, citing co.cass.tx.us.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
- For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Setbacks · by state lawNo county rule
Unincorporated Cass County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Cass County has no zoning ordinance. The county legal census found no county zoning ordinance, citing co.cass.tx.us.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
- For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Lot coverage · by state lawNo county rule
Unincorporated Cass County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Cass County has no zoning ordinance. The county legal census found no county zoning ordinance, citing co.cass.tx.us.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
- For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Building height · by state lawNo county rule
Unincorporated Cass County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Cass County has no zoning ordinance. The county legal census found no county zoning ordinance, citing co.cass.tx.us.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
- For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Living in an RV · by state lawNo county rule
Unincorporated Cass County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Cass County has no zoning ordinance. The county legal census found no county zoning ordinance, citing co.cass.tx.us.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
- For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Camping on your land · by state lawNo county rule
Unincorporated Cass County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Cass County has no zoning ordinance. The county legal census found no county zoning ordinance, citing co.cass.tx.us.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
- For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Tiny homes · by state lawNo county rule
Unincorporated Cass County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Cass County has no zoning ordinance. The county legal census found no county zoning ordinance, citing co.cass.tx.us.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
- For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Manufactured homes · by state lawNo county rule
Unincorporated Cass County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Cass County has no zoning ordinance. The county legal census found no county zoning ordinance, citing co.cass.tx.us.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
- For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Accessory dwellings · by state lawNo county rule
Unincorporated Cass County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Cass County has no zoning ordinance. The county legal census found no county zoning ordinance, citing co.cass.tx.us.
- Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
- Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
- For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
“This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
Local Government Code Chapter 231, County Zoning Authority ↗Re-checked Sep 21, 2026
Subdividing landRegulated (with conditions)
Division of tracts outside municipal limits in Cass County into two or more parts for subdivision purposes.
- Cass County Commissioners' Court adopted plat-filing standards on June 8, 1992.
- A preliminary plat must be submitted 15 days before a Commissioners' Court meeting.
- The preliminary submission fee is $5.
- Preliminary approval expires 12 months after approval.
- The stated requirements do not apply to plats prepared to divide inherited property or property partitioned by a court.
- Separate Texas Local Government Code exemptions may apply, including the agricultural-use exemption in Section 232.0015.
preliminary plat submission lead time: 15 days · preliminary plat submittal fee: 5 USD · preliminary approval validity: 12 months
“In accordance with Cass County's plat standards, a preliminary plat shall be submitted 15 days prior to Commissioners' Court meeting, along with a $5 submittal fee. [...] Approval of preliminary plat will expire 12 months after approval.”
Filing Plats in Cass County, Texas ↗Re-checked Sep 26, 2026
Permit feesPublished (with conditions)
Cass County subdivision-plat filing fees for property subject to the county plat standards, including land outside city limits.
- A preliminary plat must be submitted 15 days before the Commissioners' Court meeting.
- The preliminary-plat submittal fee is $5.
- The filing fee is $21 for a 9x12 plat and $31 for an 18x24 plat.
- The stated plat requirements do not apply to plats prepared to divide inherited property or property partitioned by a court.
- Approval of a preliminary plat expires 12 months after approval.
preliminary plat submittal fee: 5 USD · 9x12 plat filing fee: 21 USD · 18x24 plat filing fee: 31 USD
“The fee for filing plats are: 9x12 $21 18x24 $31”
Filing Plats in Cass County, Texas ↗Re-checked Sep 11, 2026
Permit processPublished (with conditions)
Subdivision plat approval in Cass County, including qualifying land outside city limits.
- A tract outside city limits must be platted when divided into two or more parts for an addition, lots, streets, alleys, squares, parks, or similar purposes.
- A preliminary plat is submitted 15 days before a Commissioners' Court meeting.
- Each commissioner receives a copy for review and the item is placed on the court agenda for preliminary approval.
- A county-approved plat and an original tax certificate from each taxing unit showing no delinquent taxes are required before the county clerk or deputy clerk may record the plat.
- The requirements do not apply to inherited-property divisions or property partitioned by a court.
- Preliminary-plat approval expires 12 months after approval.
preliminary submission lead time: 15 days before Commissioners' Court meeting · preliminary approval validity: 12 months
“A preliminary plat shall be submitted 15 days prior to Commissioners' Court meeting, along with a $5 submittal fee.”
Filing Plats in Cass County, Texas ↗Re-checked Sep 11, 2026
Building permitNot required
Cass County's official department listing shows no building/permit department; Texas counties generally lack authority to require building permits in unincorporated areas.
Cass County TX - Official Website (Departments) ↗Scouted from the county site, not yet independently re-checked
County-wide zoningAbsent
No county zoning or planning department is listed; Texas counties generally cannot zone unincorporated land absent specific legislative authority.
Cass County TX - Official Website (Departments) ↗Scouted from the county site, not yet independently re-checked

Texas rules that apply here

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:”
Industrialized Housing and Buildings – Adoption of New Code Editions ↗Re-checked Sep 12, 2026
Who permits septicMixed
On-site sewage facilities, including septic systems, throughout Texas
- In most areas, local governments act as TCEQ-authorized agents and administer the OSSF program.
- The TCEQ regional office is the permitting authority where a local jurisdiction has not been authorized.
- Local permitting programs may be more stringent than state minimums.
“TCEQ is not often the OSSF permitting authority. [...] The TCEQ regional office will be the permitting authority in locations where a local jurisdiction has not been authorized.”
Getting a Permit for an OSSF - Such as a Septic System ↗Re-checked Sep 12, 2026
Septic permitLimited
OSSF construction, installation, alteration, extension, repair, and operation in Cass County, subject to the applicable local permitting authority
- A permit is required for construction, installation, alteration, extension, or repair unless an exception applies.
- The 10-acre exemption requires a licensed Site Evaluator or Professional Engineer site evaluation; 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-property effluent disposal; and the single-family dwelling being the only dwelling on the tract.
- Emergency repairs listed by TCEQ are exempt from permitting 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 applicable date, are not creating a nuisance, have not been altered, and are not in need of repair.
- Local permitting programs may be more stringent than state minimums.
10-acre exemption tract size: >= 10 acres (Single-family dwelling and all stated TCEQ conditions must also be met.) · OSSF setback from property line for 10-acre exemption: >= 100 feet (All parts of the OSSF.) · Emergency-repair reporting deadline: <= 72 hours (Written report to the permitting authority after repairs have begun.)
“A permit is required to construct, install, alter, extend, or repair an OSSF.”
Getting a Permit for an OSSF - Such as a Septic System ↗Re-checked Sep 11, 2026
One more reviewed finding on this topic
- 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”:”
  Getting a Permit for an OSSF - Such as a Septic System ↗Re-checked Sep 12, 2026
Septic inspectionLimited
Construction inspections for OSSFs in Cass County, subject to the applicable permitting authority
- The installer must notify the permitting authority at least five working days before the OSSF will be ready for inspection.
- The permitting authority must conduct a construction inspection for systems subject to the inspection rule.
- If the OSSF fails inspection, it cannot be used until it passes inspection; the permitting authority must provide the deficiency notice within seven calendar days.
- A reinspection fee may be assessed and must be paid before reinspection.
- No inspection is required for a qualifying single-family dwelling OSSF on a tract of at least 10 acres when the system is not causing a nuisance or polluting groundwater, all parts are at least 100 feet from the property line, effluent is disposed of on the property, and the single-family dwelling is the only dwelling on the tract.
- Additional grandfathering and pre-existing authorization exceptions apply as stated in the rule.
Installer notice before inspection: >= 5 working days (Monday through Friday, excluding holidays.) · Deficiency letter deadline after failed inspection: <= 7 calendar days (The OSSF cannot be used until it passes inspection.)
“The installer shall notify the permitting authority at least five working days [...] The permitting authority shall conduct a construction inspection.”
On-Site Sewage Facility Rules Compilation ↗Re-checked Sep 11, 2026
One more reviewed finding on this topic
- Limited — OSSF installation and, where applicable, maintenance inspections in Texas
  “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
Well permitLimited
Private water wells in Cass County, Texas, subject to any applicable groundwater conservation district or other local authority
- Texas does not require private well owners to register wells with the state unless the property lies within a groundwater conservation district.
- Each groundwater conservation district has its own rules, which may require registration or permitting.
- Registered water well drillers and landowners who drill their own wells must submit a State of Texas Water Well Report when drilling a new well.
- The source does not establish whether a particular Cass County parcel lies within a groundwater conservation district.
“Texas law authorizes groundwater conservation districts (GCDs) to modify the rule of capture by regulating groundwater production through permitting of non-exempt water wells”
General Groundwater and Private Water Well Frequently Asked Questions ↗Re-checked Sep 11, 2026
Agricultural exemptionAvailable (with conditions)
Subdivision divisions outside municipal limits where the land is primarily used for agricultural, farm, ranch, wildlife-management, or timber-production purposes and the owner does not lay out a part described by Texas Local Government Code Section 232.001(a)(3).
- The division must be outside the limits of a municipality.
- The owner must divide the tract into two or more parts.
- The owner must not lay out a part described by Section 232.001(a)(3).
- The land must be used primarily for agricultural use under Section 1-d, Article VIII, Texas Constitution, or for farm, ranch, wildlife-management, or timber-production use under Section 1-d-1, Article VIII, Texas Constitution.
- If the tract ceases to be used primarily for the qualifying agricultural, farm, ranch, wildlife-management, or timber-production use, the platting requirements apply.
“A county may not require the owner of a tract of land located outside the limits of a municipality who divides the tract into two or more parts to have a plat of the subdivision prepared if: [...] (1) the owner does not lay out a part of the tract described by Section 232.001(a)(3); and (2) the land is to be used primarily for agricultural use, as defined by Section 1-d, Article VIII, Texas Constitution, or for farm, ranch, wildlife management, or timber production use within the meaning of Section 1-d-1, Article VIII, Texas Constitution.”
Texas Local Government Code Chapter 232 ↗Re-checked Sep 26, 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 — Owner-builder exemptions from Cass County building-permit, inspection, or occupancy requirements in unincorporated Cass County, Texas.
Inspections — Building inspections for construction in unincorporated Cass County, Texas.
Certificate of occupancy — Certificates of occupancy or equivalent compliance certificates for buildings in unincorporated Cass County, Texas.
Local zoning — Aggregate local zoning status across Cass County and its incorporated municipalities; this does not assert that the county administers municipal ordinances.
Off-grid sanitation — Off-grid sanitation systems, including systems other than conventional public sewer service, in Cass County, Texas

3 more unanswered

Mandatory utility hookup
Building in a floodplain
Short-term rentals

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 Cass County, Texas

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

Cass County scores 83/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and manageable long-term carry cost.

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

Cass 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 Cass County (TCEQ authorized agent for on-site sewage). 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 Cass County?

Living in an RV on your own land in Cass County is allowed: Unincorporated Cass County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Cass County has no zoning ordinance. The county legal census found no county zoning ordinance, citing co.cass.tx.us. Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits. Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters. A tiny home is allowed. Confirm with the county before relying on it.

How much does land cost in Cass County, Texas?

Land in Cass County runs about $3,571 per acre, based on the latest county data.

What is the water situation in Cass County?

Cass County gets about 50.3" of rain a year, with severe drought in roughly 16.7% of years.

How remote is Cass County?

A representative private-land location has about 20,474 people within a 30-minute drive and 1,558,001 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 land rules in Cass County, Texas

At a glance

Who to call

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

Who handles permits in Cass County, Texas?

Does Cass County, Texas have zoning?

How do septic permits work in Cass County, Texas?

Can you live in an RV or tiny home in Cass County, Texas?

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

What should you check before buying land in Cass County?

Watch-outs

Sources

Cass County in Texas

How Cass County scores

Find land. Bring the promising ones back.

Parcel due diligence

Answers from the rulebook for Cass County

Cass County rules

Texas rules that apply here

Still unanswered

Living off-grid in Cass County, Texas

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

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

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

How much does land cost in Cass County, Texas?

What is the water situation in Cass County?

How remote is Cass County?

How Cass compares in Texas