Land — Southwest — AZ
Water rights, rainwater law, cottage food rules, right-to-farm protections, livestock zoning, and growing conditions for Arizona landowners and buyers.
Land law varies by county, municipality, and HOA. Verify all information with your county planning department, state water agency, and a licensed attorney before any land purchase or development decision.
Water law
Pure prior appropriation. Water rights completely separate from land. Active Management Areas have stricter groundwater controls. Contact Arizona Department of Water Resources (azwater.gov).
Legal and encouraged. Arizona explicitly permits residential rainwater harvesting with no volume limit and offers a tax credit for collection systems.
Land use and production law
Arizona Cottage Food Law (A.R.S. §36-136) permits non-potentially-hazardous foods; $75,000 gross sales cap; direct consumer sales; labeling required. Verify with Arizona Department of Health Services.
Arizona Agricultural Protection Act (A.R.S. §3-112) protects established agricultural operations.
Rural (GR) and agricultural (AG) zones generally permit livestock. Residential zones typically prohibit. Maricopa and Pima counties have specific suburban livestock ordinances.
Growing conditions
Hardiness zones
4a (White Mountains) – 10b (Yuma/Phoenix lowlands)
Last frost
Jan 15 (Phoenix) – May 15 (Flagstaff)
First frost
Nov 15 (Phoenix) – Oct 1 (Flagstaff)
Soil testing
University of Arizona Cooperative Extension
Soil notes
Desert soils (Aridisols) dominate — caliche hardpan is common and restricts drainage. Mountain soils are thinner and more productive. Most desert soils are alkaline (pH 7.5–8.5).