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

Unincorporated Marion County, Texas does not require a county building permit for an ordinary home¹. The county's official site lists offices for elections, taxes, the clerk, the treasurer, and similar functions, but no building or permitting department¹. Marion County's own hazard-mitigation plan says the county defers to the State of Texas on building codes and has no enforcement in place². That is consistent with Texas law, which gives most counties no general building-permit authority over unincorporated land⁶. The one permit almost everyone here does need is septic, and Marion County contracts that out to the Northeast Texas Municipal Water District rather than handling it itself⁴.

Marion County has no building department: the county's own office list runs from the county judge and commissioners court through the clerk, treasurer, tax assessor, and sheriff, with nothing for building or zoning¹. For general county business, the Marion County Courthouse is at 102 W. Austin in Jefferson, phone (903) 665-3261, open 8am to noon and 1pm to 5pm on weekdays¹. Septic (OSSF) permits go to a different agency entirely: the Northeast Texas Municipal Water District at 4180 FM 250 South in Hughes Springs, (903) 639-7538⁴. NETMWD is the designated representative for Marion County's OSSF program, administering state septic requirements locally^4,7.

Marion County has no countywide zoning ordinance: Texas law gives counties zoning power only in a handful of narrow, named situations, and none of them reaches Marion County³. That means no county rule sets minimum lot size, setbacks, building height, or minimum dwelling size, and RV, tiny-home, and manufactured-home living on your own land is unrestricted by county zoning³. This answer covers unincorporated Marion County only; land inside an incorporated city such as Jefferson is a separate jurisdiction and isn't covered by this county-level answer³.

Septic (OSSF) permitting in Marion County goes through the Northeast Texas Municipal Water District, not the county or a health department⁴. Submit the application and planning materials to NETMWD; the permitting authority must approve or deny them within 30 days after receipt and explain a denial in writing⁸. A designated representative's duties can include reviewing plans, issuing permits, and inspecting system installation⁹. A single-family residence permit costs $360, while a multi-family or commercial permit costs $610⁴. A narrow state exemption may apply to a qualifying single-family home on 10 acres or more, subject to the full conditions⁸. Only about 12% of Marion County land is free of severe limitations for a conventional septic drainfield, so arrange a site evaluation early⁵.

Yes, as far as county zoning goes: Marion County has no zoning ordinance, so no county rule restricts RV, tiny-home, or manufactured-home occupancy on your own unincorporated land³. That's a zoning answer, not a septic answer — anyone living on the property still needs a permitted OSSF system through NETMWD, or a qualifying state exemption, for wastewater^4,8. If your land is inside the City of Jefferson's limits rather than unincorporated Marion County, this county-level answer doesn't apply, and you'd need to check the city's own rules³.

1. Confirm your land is in unincorporated Marion County and not inside the City of Jefferson, because the county zoning answer applies only outside incorporated cities³.
2. Arrange a septic site evaluation early; only about 12% of Marion County land is free of severe limits for a conventional drainfield⁵.
3. Submit the OSSF application, planning materials, and the $360 single-family fee to NETMWD; the permitting authority has 30 days after receipt to approve or deny the application^4,8.
4. If you will build or modify a driveway connecting to a state highway, obtain the required permit using Form 1058 before construction¹⁰.
5. The home itself does not require a Marion County building permit on unincorporated land, but follow the approved septic plan and any installation inspection NETMWD requires^1,9.

Water and septic go together here: Marion County gets about 50.1 inches of rain a year, but only about 12% of its soils are free of severe limits for a conventional septic drainfield, so arrange a site evaluation before fixing a house site⁵. Texas gives no state agency authority over private groundwater use; local groundwater conservation districts may require well permits, and land outside a district falls under the rule of capture, but we could not confirm whether all of Marion County lies in a district, so ask the courthouse before planning a well^1,11. Dividing a tract outside city limits to lay out lots, a subdivision or public streets requires a plat approved by the county commissioners court, though land used primarily for agricultural, ranch, wildlife-management or timber use can qualify for an exemption^12,13. We also could not confirm a county floodplain-development rule, so ask the courthouse about the parcel and review its flood exposure before buying¹. A new or modified driveway onto a state highway requires a permit, while the cited rule does not establish a requirement for access only to a county or private road¹⁰. Marion County's effective property-tax rate is about 0.8%, and the median annual bill is about $870⁵.