Building permits, zoning and land rules 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 order¹⁰. 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 approval^6,7,11.

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 program^3,4. 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 first⁴. The published single-family septic permit fee is $360⁴. For a land division, contact the Cass County Clerk about filing an approved plat; Cass County publishes filing fees of $21 for a 9x12 plat and $31 for an 18x24 plat^5,12. A driveway connecting to a Texas state highway goes through the local TxDOT district office rather than a general county building office¹¹.

Unincorporated Cass County has no county zoning ordinance^1,2. 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 camping². 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 exceptions⁷. Qualifying agricultural, farm, ranch, wildlife-management or timber-production divisions may be exempt while that use continues and the other conditions are met⁸.

A permit and approved plan are normally required to construct, install, alter, extend, repair or operate an OSSF in Cass County⁶. Cass County is the authorized agent, and NETMWD serves as the designated representative that receives applications and fees^3,4. 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 inspection^6,13. Only 12% of Cass County soils avoid severe limitations for a conventional drain field, so arrange the site evaluation before settling on a house location⁹. 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 disposal⁶. A TCEQ implementation plan from 2013 describes NETMWD as permitting septic systems in Cass County except on tracts of 10 acres or more and inside certain city limits, but that source is dated and we could not confirm the current split, so a buyer of a tract that size should ask NETMWD whether it or TCEQ Region 5 in Tyler handles the application^3,14. Owners may install their own system for a single-family home they own only if the permitting authority allows owner installation and the owner has the knowledge, skills and equipment; ask NETMWD whether it does⁶.

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 size². 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 plan^4,6. 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 standards¹⁵. 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.

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; submit a preliminary plat 15 days before Commissioners Court with the $5 submittal fee, and remember that preliminary approval expires after 12 months^5,12. Third, arrange an early septic site evaluation because only 12% of county soils avoid severe conventional-drain-field limits⁹. Fourth, submit the OSSF application and fee to NETMWD before septic work begins unless every condition of a state exemption is satisfied^4,6. Fifth, if access meets a state highway, submit Form 1058 to TxDOT and wait for the executed permit before work in the right of way¹¹. Finally, proceed with the home knowing no general county building permit applies, but ask the County Judge about any unusual occupancy, commercial or multifamily issue^1,10.

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 budget⁹. 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 Report¹⁶. Check legal access and determine whether a driveway will enter a state highway, because that connection requires a TxDOT permit¹¹. 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 tracts⁹. The typical effective property-tax rate is about 1.1%, and the median annual bill is about $1,419⁹.