Texas

Buying Land in Cass County, Texas

Cass County, seat Linden, sits in deep East Texas timber country along the Arkansas and Louisiana borders. Land near Wright Patman Lake carries a real, government-imposed flowage easement most buyers don't expect, and the county is one of 15 currently pursuing a brand-new Northeast Texas groundwater district that doesn't exist yet.

Wright Patman Lake Flowage Easements Cover a Real Amount of Private Land

Case-by-case / verify locally

The US Army Corps of Engineers holds flowage easements on roughly 78,000 acres of privately owned land around Wright Patman Lake, spanning Bowie and Cass Counties. On flowage easement land -- generally the area between the Corps' fee-owned boundary and a mapped 265-foot-above-mean-sea-level contour -- the government has perpetual rights including the right to flood the land, to prohibit any structure built for human habitation, and to approve or deny nearly any other structure. See the dedicated easements page for what this means for a specific near-lake parcel.

No Groundwater District Yet -- But Cass County Is Pursuing One

Could not confirm

This research found no existing groundwater conservation district covering Cass County, so the statewide rule of capture applies for now. That may change: as of July 2026, Cass County was one of 15 Northeast Texas counties that had formally signed resolutions to pursue creating a new Northeast Texas Groundwater Conservation District, with an attorney drafting the enabling legislation for the Texas Legislature's 2027 regular session. The proposed district would target large commercial water users while exempting farm and residential wells -- but it does not exist yet and requires legislative approval. Ask the county directly for the current status before assuming either way.

Septic Permitting Likely Runs Through a TCEQ Regional Office

Case-by-case / verify locally

Cass County does not appear among the roughly 40 Texas counties with confirmed TCEQ OSSF authorized-agent status, which suggests septic permit applications here are reviewed by a TCEQ regional office rather than a county department. Confirm the correct office and current fees directly before budgeting for a system.

Wright Patman Lake: a real, mapped restriction on private land

Wright Patman Lake, formed by a Corps of Engineers dam on the Sulphur River in Bowie and Cass Counties, comes with a land-use restriction that surprises a lot of buyers: the Corps holds flowage easements -- not fee ownership, but a perpetual set of rights -- on roughly 78,000 acres of privately owned land in the area around the reservoir. On flowage easement land, generally the strip between the Corps' own fee boundary and a contour mapped at 265 feet above mean sea level, the government retains the right to flood the property as part of operating the lake, the right to flatly prohibit any structure meant for human habitation, and the right to approve or deny nearly any other structure (fencing is the one specifically named exception). This is a real, current restriction with a real enforcement mechanism, not a historical footnote -- see the dedicated easements page for exactly how to check whether a specific parcel is affected and what the approval process looks like.

Groundwater: nothing exists yet, but change is in motion

Cass County currently has no groundwater conservation district of its own, and this research found no other GCD with jurisdiction reaching into the county, so groundwater production here still runs on the statewide rule of capture described on the Texas hub. That could change in the next few years: Cass County is one of 15 Northeast Texas counties that formally signed on, as of July 2026, to a joint effort to create a new Northeast Texas Groundwater Conservation District, aimed at regulating large commercial water users (with an exemption planned for farm and residential wells) amid rising demand. An attorney has been retained to draft the enabling bill for the Texas Legislature's 2027 regular session, but the district does not exist yet and requires legislative approval before it can be created, board-appointed, and funded. A buyer counting on an unregulated well here for the long term should ask the county directly for the current status of this effort before assuming today's rules will still apply in a few years.

Septic permitting: expect a TCEQ regional office, not the county

Cass County is not among the roughly 40 Texas counties with confirmed TCEQ OSSF authorized-agent status, so septic (OSSF) permit applications here most likely go through a TCEQ regional office rather than a county environmental health department. Confirm the correct regional office, current fees, and site-evaluation requirements directly with the Cass County Commissioners Court or TCEQ before budgeting for a system, since a state office covering multiple counties can run on a different timeline than a dedicated county program.

What we could and couldn't confirm

Wright Patman Lake's flowage-easement acreage, its 265-foot contour boundary, and its specific restrictions (prohibition on human-habitation structures, Corps approval for other construction, the wire-fencing exception) are drawn from the US Army Corps of Engineers' own Fort Worth District real estate pages for the project. The Northeast Texas Groundwater Conservation District effort, its 15-county roster including Cass County, its planned scope (targeting commercial users while exempting farm and residential wells), and its 2027 legislative timeline are drawn from July 2026 reporting by The Texas Tribune and KSAT. Cass County's non-authorized-agent TCEQ status is inferred from a septic-industry guide site referencing the roughly 40-county authorized-agent list rather than TCEQ's own current roster, and should be reconfirmed directly.

Verify directly with: the US Army Corps of Engineers Wright Patman Lake Project Office for flowage-easement status and construction approval on a specific parcel, the Cass County Commissioners Court for septic-permitting authority and subdivision rules, and the county for the current status of the proposed Northeast Texas Groundwater Conservation District

Who to Call Before Buying Land in Cass County

Cass County has no general zoning authority and is not among the named Chapter 231 exceptions, so there is no planning_zoning entry above. Cass County is not a confirmed TCEQ OSSF authorized agent, so septic permitting most likely runs through a TCEQ regional office rather than the county -- confirm directly. This research could not confirm a direct phone number for the Cass County Clerk beyond its website.

Subdivision & Land Development

Cass County Commissioners Court

Subdivision plat approval, road standards, septic-permitting authority, and general land-use questions for unincorporated Cass County.

Phone: (903) 756-5181Official website →

Other

US Army Corps of Engineers -- Wright Patman Lake Project Office

Whether a specific parcel is subject to a flowage easement, and approval for any structure planned on flowage easement land.

Phone: (903) 838-8781Official website →

Fee Land and Real Estate Information

Assessor / Property Tax

Cass County Appraisal District

Assessed property values, agricultural (ag) valuation applications, and parcel search.

Phone: (903) 756-7545Email: info@casscad.orgOfficial website →

Recorder / Clerk / Land Records

Cass County Clerk

Recorded deeds, easements, and plat history for a specific parcel.

Official website →

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Topics Specific to Cass County

Easements in Cass County: Wright Patman Lake Flowage Restrictions →

Sources

Wright Patman Lake — US Army Corps of Engineers, Fort Worth District (accessed 2026-09)
Fee Land — US Army Corps of Engineers, Fort Worth District (accessed 2026-09)
Wright Patman Lake — Wikipedia (accessed 2026-09)
Northeast Texas counties work to form groundwater district — The Texas Tribune (accessed 2026-09)
East Texas counties move to protect groundwater with new conservation district — KSAT (accessed 2026-09)
Commissioners Court — Cass County, Texas (accessed 2026-09)
Cass County Appraisal District — Cass County Appraisal District (accessed 2026-09)

Last reviewed 2026-09