"Buildable" isn't a label the county stamps on a parcel. It means the land clears every requirement for the use you want at the same time: the zoning allows it, you can legally and physically get there, there's a water source, wastewater can be handled, power is possible, and the lot itself was legally created. Fail one and you either can't build or you pay to fix it.
Here are the requirements, then a decision checklist.
1. Zoning allows the use
Ask the planning department for the jurisdiction (county for unincorporated land, the city or town otherwise) what the zoning district allows, the minimum lot size, and the setbacks from property lines. Ask too whether an area plan applies. See how to check zoning in Arizona.
2. The lot was legally created
This is the one people miss. Dividing land for sale into six or more lots, parcels or fractional interests is a "subdivision" under A.R.S. 32-2101, unless every lot is 36 acres or more. Counties may also review smaller splits: five or fewer lots where any lot is 10 acres or smaller can go through a minor land division review, in which the applicant shows zoning compliance, legal access and utility easements (A.R.S. 11-831).
Land divided around these rules, often called "wildcat" splits, can leave a parcel that the county won't issue permits on until the problem is cured. Ask the planning office directly: "Is this a legal lot, and will you issue a building permit on it?"
3. Legal and physical access
You need both a recorded right to reach the parcel (a public road or a recorded easement) and a route a vehicle can actually travel. In a county minor land division, a surveyor must state that each lot has physical access "traversable by a two-wheel drive passenger motor vehicle" (A.R.S. 11-831). See how to check legal access.
4. A water source
Options are a water provider, a well, or hauled water where the county allows it. Inside one of Arizona's eight Active Management Areas, groundwater rules are tighter; exempt wells (35 gallons per minute or less) still need a notice of intent and a completion report, and inside an AMA generally only one exempt well may serve the same use at the same location (A.R.S. 45-454). Check whether there's a registered well nearby with our well lookup guide.
5. Wastewater approval
Without sewer, you need a county-issued on-site wastewater permit, which starts with a site investigation of soils, slope and setbacks. A slope over 15% and a 100-year flood hazard zone are both limiting conditions, and the system must be at least 100 feet from any water supply well. See Arizona septic requirements.
6. Power
For most buyers and most uses, power is the practical deciding factor. Ask the serving utility for a free preliminary estimate. See how to find out whether power is near.
7. Flood zone and floodplain permit
Check the FEMA flood map. In a delineated floodplain, no development may take place without written authorization from the county flood control district board (A.R.S. 48-3613). That isn't automatically a no, but it adds review and design requirements. See flood zones.
8. Deed restrictions and setbacks
Recorded deed restrictions or CC&Rs can limit home size, materials, manufactured homes, livestock or how long you can camp on a lot. They're separate from zoning and can be stricter. Search the county recorder. Then combine zoning setbacks, septic setbacks, wash setbacks and easements on a sketch of the lot to confirm there's actually room to build.
Decision checklist
| Question | Where to check | If the answer is "no" |
|---|---|---|
| Does zoning allow the use? | County or city planning | Rezoning or variance; uncertain and slow |
| Is it a legal lot? | County planning | Often a dealbreaker until cured |
| Recorded legal access? | Recorder, title commitment | Negotiate an easement or go to court (A.R.S. 12-1201) |
| Physical access? | Site visit, imagery | Road building; added cost |
| Water source available? | ADWR, providers, well registry | Hauled water if allowed; often a dealbreaker |
| Septic feasible? | County septic office, site investigation | Alternative system; added cost or dealbreaker |
| Power available? | Serving utility | Line extension or off-grid; added cost |
| Outside the floodplain? | FEMA map, county flood control | Floodplain authorization and design |
| Deed restrictions OK? | County recorder | Usually a dealbreaker for the restricted use |
| Room after setbacks? | Your own sketch | Smaller footprint or no build |
A parcel with "added cost" answers can still be a good buy if the price reflects them. A parcel with a dealbreaker isn't buildable for that use at any price, though it may still have value for recreation, investment, grazing or a neighbor's expansion.
What if it isn't buildable?
Unbuildable doesn't mean unsellable. Buyers price the problems in. Our pages on selling hard-to-sell land cover the options. To go deeper on any item above, use the full due-diligence checklist.
Sources
- A.R.S. 32-2101 — Definitions (subdivision, unsubdivided lands)
- A.R.S. 11-831 — Review of land divisions
- A.R.S. 45-454 — Exemption of small non-irrigation wells
- ADWR — Active Management Area overview
- Ariz. Admin. Code R18-9-A310 — Site investigation for Type 4 on-site facilities
- Ariz. Admin. Code R18-9-A312 — Facility design, including setbacks
- A.R.S. 48-3613 — Development in floodplains; written authorization
- FEMA Flood Map Service Center
- APS Service Schedule 3 — Conditions governing extensions of electric distribution lines
- Navopache Electric Cooperative — Electric Service Policies and Standards Manual
- A.R.S. 12-1201 — Private ways of necessity (text via Justia)
Checked 2026-10-02. Links go to the agency or publication named.
General information, not legal, tax or survey advice. First 48 Offers LLC is a real estate investment company that buys land. It is not a law firm, brokerage, surveyor or title company. Arizona statutes, county procedures and agency boundaries change, and every parcel turns on its own facts. Verify anything important with the county, the agency named, or an Arizona attorney before relying on it.