Lot Split in Arizona: Splitting Your Horse Acreage

The short answer: A lot split in Arizona divides one parcel into a small number of new parcels without the full subdivision process. In unincorporated county land, A.R.S. 11-831 covers land divisions of five or fewer lots, and the review looks at zoning minimums, legal and physical access, and utility easements for each new parcel. Six or more lots is a subdivision under A.R.S. 32-2101, unless every lot is 36 acres or more.

A lot split in Arizona sounds simple. You own five acres, you want to give two to your daughter, or sell a back piece to pay off the barn. Draw a line, record a deed, done.

Here is the problem. If that new parcel does not meet zoning, does not have legal access, or does not have room for utilities, you can create a lot nobody can get a building permit on.

So let's go through what Arizona law actually says. I read the statutes for this one, and I will tell you which section says what.

A lot split is dividing one parcel into a small number of new parcels without going through the full subdivision process. In unincorporated county land, the rules come from A.R.S. 11-831, titled "Review of land divisions." It covers land divisions of five or fewer lots, parcels or fractional interests.

Inside city or town limits, your city's own land division rules apply, and the state definition of a subdivision kicks in sooner. More on that below.

Under A.R.S. 11-831, a county board of supervisors may adopt rules for staff review of land divisions of five or fewer lots, any of which is ten acres or smaller. Under that review, the statute says an application to split a parcel "shall be approved" if:

1. Each new parcel meets the minimum county zoning requirements. The statute defines that as the minimum acreage and dimensions required by the zoning ordinance.
2. You show legal access. A standard preliminary title report, or another acceptable document, has to demonstrate legal access to each parcel.
3. You address physical access. A licensed surveyor or engineer, or other evidence the county accepts, states whether each parcel has physical access traversable by a two-wheel drive passenger vehicle.
4. You reserve utility easements to serve each new parcel. The statute defines a utility easement as eight feet wide, dedicated to the public for sewer, electric, gas and water.
5. You sign an affidavit acknowledging that it is unlawful to act in concert to divide land into six or more lots to avoid the subdivision laws.

The statute also says the county may not deny a land division that meets these requirements, and if review is not completed within 30 days, the division is considered approved.

The split can still be approved, with a catch. Under subsection C, you sign an acknowledgment confirming that a building or use permit will not be issued until the parcel meets the requirements. The county may also grant a variance.

Read that again if you are buying a split-off parcel. A recorded parcel is not the same as a buildable parcel.

Yes, within limits. Under subsection D, an approval may spell out the minimum legal and physical access that must be met before a building or use permit is issued. It may also identify "topographic, hydrologic or other site constraints" that have to be addressed first, such as a wash crossing the back of the parcel. The statute adds that "there shall be no requirement for independent studies."

Subsection E covers counties and divisions where the subsection A review does not apply. There, staff review of five or fewer parcels is limited to minimum zoning and legal access, and "a county may not require a public hearing" on the request. The 30-day deemed-approved rule applies here too. And if legal access does not allow emergency vehicles, the statute says neither the county nor its employees are liable when emergency vehicles cannot reach the parcel. On horse property, that is worth thinking hard about.

Under subsection E, for counties that use the more limited review, if legal access is not available, does not allow emergency vehicles, or zoning is not met, "the access or zoning deficiencies shall be noticed in the deed." That is why I read the deed on every land deal, not just the listing.

Our guide to easements and right-of-way on rural Arizona land explains how to read access on a title report.

This is the line that matters most.

State real estate law, A.R.S. 32-2101, defines a subdivision as land divided "into six or more lots, parcels or fractional interests." It does not include a division where each lot "is or will be thirty-six acres or more in area."

Inside a city or town, A.R.S. 9-463.02 defines a subdivision as land divided into "four or more lots, tracts or parcels," or two or more if a new street is involved. Below that line, ask your city's planning department how its own code handles the division.

No. A.R.S. 11-831(F) says it is unlawful for a person or group "acting in concert" to attempt to avoid the subdivision laws by dividing a parcel into six or more lots, or selling six or more lots, "by using a series of owners or conveyances." Either the county or the state real estate department may enforce it.

The statute also says "a familial relationship alone is not sufficient to constitute unlawful acting in concert." Giving land to your kids is not, by itself, a violation.

Your zoning sets both the minimum lot size and, in many towns, how many horses you can keep. Split five acres into two and a half and two and a half, and each new owner is working with the smaller number. Our breakdown of how many horses per acre Arizona zoning allows is the place to check before you draw the line.

Water is the other piece. Before you split, know how each new parcel will get water. Our guide to well, hauled or city water on Arizona horse property covers the options.

• Assuming a recorded parcel is a buildable parcel. A county can approve a split where no building or use permit will be issued until the requirements are met.
• Skipping the title report. Legal access has to be shown for each new parcel.
• Forgetting the utility easements. Each new parcel needs eight-foot utility easements reserved to serve it.
• Drawing lines below the zoning minimum. Each new parcel has to meet it, and in many towns zoning also sets how many horses you can keep.
• Splitting in a series to dodge the subdivision laws. A.R.S. 11-831(F) makes that unlawful.

I am Kim Williamson, REALTOR®, with REAL Broker, and I help buyers and sellers of horse property and acreage across the Metro Plex of Arizona. Run the numbers both ways. Sometimes a split adds value, and sometimes a buyer wants the whole parcel and will pay for it. I would rather we look at both before you spend money on a surveyor.

Line up four things before you file: the zoning minimum, the title report showing legal access, a surveyor's word on physical access, and where the eight-foot utility easements go. If you are ready to sell all or part of your land, start with how I approach land and acreage sales.

If you are buying a parcel that was split off, ask for the land division approval, read the deed for noticed deficiencies, and confirm a building permit is available before you close. Our guide on how to buy land for a horse property in Arizona walks through the rest of the due diligence.

How many lots can I split my land into in Arizona without it being a subdivision? Under A.R.S. 32-2101, a subdivision is six or more lots, unless each lot is 36 acres or more. Inside a city or town, A.R.S. 9-463.02 starts at four lots, or two if a new street is involved.

How long does a county have to review a lot split? Under A.R.S. 11-831, if review is not completed within 30 days after the county receives the request, the land division is considered approved.

Does each new parcel need road access? The county review requires legal access shown by a title report or other acceptable document, plus a statement on physical access by a two-wheel drive vehicle.

Can I split land to give to my children? The statute says a family relationship alone is not unlawful acting in concert. Zoning, access and utility easement rules still apply.

Is a split parcel always buildable? No. A county can approve a split where a building permit will not be issued until requirements are met, and access or zoning deficiencies can be noticed in the deed.

Want to read the law for yourself? These are the primary sources this article is built on, straight from the Arizona State Legislature (links checked October 4, 2026):

• A.R.S. 11-831: Review of land divisions
• A.R.S. 32-2101: Definitions, including "subdivision"
• A.R.S. 9-463.02: Subdivision defined, for cities and towns

Do your own due diligence. This article is general information to help you ask better questions. It is not legal advice. Always do your own due diligence and, before you divide land, confirm the details for your specific parcel with your county or city planning office, a licensed surveyor and an Arizona attorney.

Own acreage in the Metro Plex of Arizona and wondering what it is worth whole or split? I am Kim Williamson, REALTOR®, with REAL Broker, and I help buyers and sellers of horse property and acreage across the Metro Plex of Arizona. I have lived in Arizona 36 years, sold real estate here for 24 years, closed 1,000+ transactions, and I am an 8x WPRA World Champion. Call or text 480-206-1500, or start at www.ArizonaHorsePropertyForSale.com.