Splitting Land in Texas: When You Need a Plat

I come from architecture, where we spend most of our time worrying about the building.

With land, the first question is usually about a line on the ground.

Can I just cut this off and sell it?

In Texas, the answer is maybe. It depends on three things: where the land sits, how big each piece is, and who it's going to.

Let me explain.

Step one: whose rules are you under?

Every piece of Texas land sits in one of three places. Inside a city. Inside a city's ETJ (the extraterritorial jurisdiction, basically a ring just outside city limits). Or out in unincorporated county land.

Each one has its own rules for splitting land. In an ETJ, you usually have to make both the city and the county happy.

The fastest check is the city or county GIS map. Tarrant County, for example, publishes its ETJ boundaries online. If the map isn't obvious, call the county engineering office. Five minutes on the phone beats five months of cleanup.

County land: two pieces means a plat

Chapter 232 of the Local Government Code is pretty blunt. If you divide a tract into two or more parts to lay out lots or streets, you need a plat. Doesn't matter if you do it with a deed or a contract for deed.

That's the rule. The exemptions are where it gets interesting, and they're where most rural splits live. None of them work if you lay out new public streets:

• Every new lot is more than 10 acres.
• The land is used mainly for farming, ranching, wildlife or timber (and stays that way).
• Four or fewer pieces, all going to family within the third degree.
• Heirs or co-owners dividing what they already own together.
• A two-piece split where the buyer plats later, or a Veterans Land Board sale.

Read the first one again.

"More than 10 acres" means more than. Cut 20 acres exactly in half and neither piece qualifies.

One word. Big difference.

Counties can add their own definitions on top. And near the Gulf coast or the border, things get stricter. A 2025 law (HB 3680) added platting rules in certain Gulf counties, including for lots of 5 acres or less. If that's you, call the county first.

Inside a city or ETJ: the 5-acre rule

Chapter 212 uses the same "two or more parts" trigger. The big exception is pieces larger than five acres, where each one has access and nothing is being dedicated to the public. Cities can exempt more by ordinance, so check yours.

Here's the part people miss. In the ETJ, the city can apply its subdivision rules, but it generally can't tell you what to build, how tall, or how many units per acre. That's very different from being inside city limits.

The ETJ exit door

Since September 1, 2023, SB 2038 lets owners petition out of a city's ETJ. If the city doesn't act within 45 days, the land is released by law and the county takes over. (There are exceptions near military bases, industrial districts and strategic partnership areas.)

That door got a little narrower in 2025. HB 2512 limits releases for some smaller lots (under 12 acres) and lots in bigger platted subdivisions, in the ETJ of cities that span four or more counties. If that sounds like your city, check with the planning department before you file.

How long does it take?

Less than you'd think. Cities and counties have 30 days after a complete filing to approve, approve with conditions, or say no. Miss it and the plat is approved by law. Counties also have 10 business days to tell you what's missing.

Two 2023 laws, HB 3699 for cities and HB 3697 for counties, made that firmer. They have to publish what a complete application looks like, and if they stall you anyway, you can go to court and get your attorney's fees back.

What happens if you skip it?

Usually nothing.

Until your buyer tries to do something.

In a city or ETJ, utilities generally can't hook up water, sewer, power or gas to land that needed a plat and didn't get one. Anyone can ask the city whether a plat is required, and it has 20 days to answer. Counties can sue, and knowingly breaking county plat rules is a Class B misdemeanor.

Not the kind of surprise you want attached to a lot you just sold.

A legal split isn't always a buildable one

Before you draw the lines, check the things that decide whether anyone can actually build on the pieces:

• Septic: new single-family lots in a subdivision need at least half an acre with public water, or one acre with a private well (TCEQ rules).
• Access: the city 5-acre exception only works if every piece has access. Counties can also set road standards and require bonds.
• Floodplain: some counties, like Bastrop, require a development permit for any development in unincorporated areas, with daily fines for skipping it.
• Ag valuation: if the land loses its agricultural or open-space use, the rollback tax reaches back three years (with no interest since 2021).
• Deed restrictions: pull them from the county clerk. They can forbid a split the law would allow.

None of this is complicated once you know which bucket your land is in. The trouble starts when people find out after closing.

Draw the lines on paper before you draw them in the dirt.