New Rules for Subdividing Rural Texas Land: What You Might Not Know Yet

By Attorney & Counselor Eric Gomez

You inherited 60 acres, or you’re finally ready to sell off a few lots from the back pasture — and you assume you already know the rules, because you looked into this a few years ago. Here’s the problem: the rules changed, and most landowners haven’t caught up.

Recent updates to Texas subdivision laws are quietly catching local governments and landowners off guard, which changed whether you need a plat to subdivide your property, and adds a new hurdle for land that runs on well water. Miss either one, and you can find out the hard way through increased and unexpected costs that may have been avoidable.

The Acreage Threshold Moved

For years, a Texas landowner dividing rural property outside city limits had to demonstrate that tracts were over 10 acres and that they weren’t making any improvements intending to be used by their tract owners. That burden has changed. Under the current Texas Local Government Code, a county cannot require a plat for an unplatted tract if every lot created is larger than 10 acres and the owner does not layout streets, alleys, squares, parks, or other parts of the tract intended by the owner of the tract to be dedicated to public.

That’s it! If you’re dividing a large ranch into big parcels, more of what you’re doing may now be exempt from platting than you’d expect. In my experience, Texas counties are still accustomed to requiring plats for any subdivisions of land with any improvements, such as private roads, utility lines, and similar, regardless of intent. This is not the law and some friendly education will go a long way.

Groundwater Now Requires Proof, Not Assumptions

The second change hits harder for anyone planning a subdivision that will run on well water, which describes a large share of rural Texas. Since January 1, 2024, if a plat shows lots will be served by groundwater under the property, the application must include a certification — prepared by a licensed Texas engineer or geoscientist — confirming adequate groundwater is actually available.

This isn’t a box you can check yourself. It requires real data about the aquifer beneath your land and a licensed professional’s sign-off, and in counties inside a Priority Groundwater Management Area, the requirements can be even stricter. Landowners who don’t plan for this ahead of time often find out only after their application stalls at the county office — sometimes months into a deal.

Where This Actually Costs People

None of this sounds dramatic in the abstract. In practice, it shows up as real money and real delay:

• A seller lists 11-acre lots believing they’re exempt under the old rule, then discovers mid-contract that the county is requiring a plat because of a private road — and the closing is lost.
• A family dividing inherited land among heirs assumes any split is automatically exempt, without checking whether the lot sizes and intended use actually matter.
• A landowner planning a small well-water subdivision doesn’t budget for a hydrogeologic certification and loses a construction season waiting on an engineer’s report.

In each case, the fix is simple — if it’s caught before the plat is filed or the contract is signed. Caught after, it’s a much more expensive problem.

Why This Is Worth a Phone Call Before You File

Subdivision law in Texas isn’t just the state code — it’s the state code layered with county orders, city ETJ rules, and local water district requirements, and the combination is different in almost every county. What’s exempt in one county can require a full plat in the next. An attorney who works in this area can tell you, before you invest time and money, exactly what your county will require, whether your groundwater certification needs to go further than the state minimum, and how to structure the division so it doesn’t stall halfway through.

That’s the difference between a subdivision that moves smoothly and one that sits in limbo at the county office for months while everyone tries to figure out what went wrong.

Braun & Gresham‘s real estate attorneys work with Texas landowners on exactly these questions — plat requirements, water availability, and county approval — before problems show up in a signed contract. If you’re planning to divide or sell rural acreage, it’s worth a conversation before you file, not after.