Can you build a PSL Modular unit in Arizona?

In cities of 75,000 or more, you can build at least one attached and one detached ADU on a single-family lot. That's the core of HB 2720 (codified at ARS 9-416.18, effective January 1, 2025). Cities must adopt regulations allowing them and can set reasonable standards (size, height, setbacks), but they can't ban casitas outright. Smaller towns and unincorporated county areas aren't covered by the mandate and follow local rules.

The Arizona Office of Manufactured Housing (OMH), within the Arizona Department of Housing. OMH reviews the plans and the unit is inspected during construction; upon passing, an Arizona Insignia of Approval label is affixed certifying the factory-built portion meets state standards. Your local jurisdiction then permits the site work — foundation, utilities, zoning — without re-reviewing the structure.

Heat. Across the low desert (Phoenix, Tucson, Yuma) the design priority is the thermal envelope — insulation, high-performance glazing, reflective roofing, and right-sized cooling — so the unit stays efficient through 115-degree summers. In the high country (Flagstaff, Sedona, the Mogollon Rim) it flips: snow load and wildfire-resistant cladding take over. PSL Modular sets the envelope to your specific climate zone.

Often yes, but check locally. HB 2720 opened ADU construction statewide in big cities, and Arizona broadly limits cities' ability to ban short-term rentals — but cities can still regulate STRs (licensing, taxes, occupancy). If your numbers depend on nightly rental, confirm your city's STR ordinance before you build.

No. HB 2720 applies to municipalities of 75,000+. On unincorporated county land or in smaller towns, ADUs follow local zoning — which is often permissive, but isn't governed by the state mandate. Confirm with your county planning department.