Buying Land in Maricopa County, Arizona

Rural Land Market: Real but Narrow

Case-by-case / verify locally

Maricopa County's land is split roughly 53% federal, 29% private, 13% state, and just under 5% tribal, per the county's own published figures -- and most of the private share sits inside one of the county's 24 incorporated cities and towns, not unincorporated rural land. Raw land for sale here is concentrated at the metro's edges (areas like Tonopah, Wittmann, and Aguila in the West Valley) rather than distributed evenly across the county -- treat this as a specific-neighborhood search, not a countywide one.

County Zoning Ordinance (MCZO) for Unincorporated Land

Generally favorable

The Maricopa County Zoning Ordinance (MCZO), administered by the Planning & Development Department, governs unincorporated land with dedicated Rural (RU) zoning districts -- RU-43, RU-70, and RU-190 -- named for their minimum lot size in square feet (43,000, 70,000, and 190,000 sq ft, or roughly 1, 1.6, and 4.4 acres). Much of the exurban rural-residential land buyers look at falls into one of these three districts. The county has also been modernizing the MCZO's text and graphics in recent years -- confirm you're looking at the current version for your parcel.

Phoenix AMA / Assured Water Supply Exposure

Case-by-case / verify locally

Maricopa County sits inside the Phoenix AMA, which means the state hub's Assured Water Supply material -- including the 2023 halt on new groundwater-based Certificates in the Phoenix AMA and the active 2026 litigation over ADWR's modeling rules -- applies directly to any subdivision of six or more lots here. This is state-hub material and isn't repeated in depth on this page; if you're evaluating a platted or to-be-platted subdivision, confirm its current Assured Water Supply status with ADWR directly rather than assuming based on general county information.

Septic and Well Feasibility at the Fringe

Could not confirm

Exurban West Valley and North Valley parcels often rely on individual wells and septic systems rather than municipal utilities. Well yield and septic suitability vary by specific location and aren't something this county-level page can determine -- confirm feasibility for the specific parcel through the county Environmental Services Department and a licensed well driller before assuming utility access.