Arizona’s New ADU Law Expands Housing Options and Protects Property Rights for Homeowners

Arizona homeowners have just gained a big win with the signing of House Bill 2928, a new law that makes it easier to build accessory dwelling units (ADUs)—also known as casitas or guest houses—on their properties. Sponsored by House Majority Leader Michael Carbone, this reform eliminates unnecessary local restrictions that have long burdened homeowners and makes it easier to add additional living space on lots zoned for single-family homes.

For years, homeowners in Arizona faced red tape and excessive requirements when trying to build an ADU. Local governments often imposed rules that included everything from parking requirements to costly construction conditions, making the process more complicated than it needed to be. With this new law, however, Arizona is streamlining the process and setting clear, fair rules that allow both attached and detached ADUs.

The law ensures that homeowners won’t have to deal with excessive fees, unnecessary setbacks, or design rules that have no bearing on the safety or functionality of the units. Instead, it sets straightforward standards that help homeowners get the most out of their property without the bureaucratic hassle. This is great news for families who need more space—whether it’s for aging parents, young adults, or as an extra source of income.

“Arizona homeowners should be able to use their property without being buried in red tape,” said Carbone. “ADUs are a practical solution, and it’s time the law recognized that.” After months of working with counties and stakeholders, the new law finally gives homeowners more freedom to decide what works best for their property.

While the law gives homeowners more flexibility, it does include some important exemptions for areas that have special considerations, like tribal lands, military zones, or high-noise areas. It also allows counties to require septic system evaluations for ADUs that aren’t connected to sewer systems. Counties will need to adopt the new regulations by January 1, 2026, or the law’s default provisions will automatically take effect.

For many, this reform could be a game-changer in Arizona’s housing market. By cutting out unnecessary restrictions, it paves the way for more affordable housing and helps families create the kind of spaces they need. Whether you’re looking to add a home office, create a space for a relative, or rent out an extra unit, this new law provides the freedom to make it happen.

This reform reflects a broader commitment to preserving the American Dream by protecting property rights and ensuring housing remains attainable for all. By simplifying the process for ADUs, House Republicans have made a significant step toward addressing housing challenges in Arizona, helping families thrive without unnecessary government interference.

As Arizona homeowners begin to embrace these new possibilities, the law will give them the freedom to use their property to its fullest potential, all while keeping housing options more affordable and accessible. It’s a win for property rights and a step in the right direction for addressing the state’s growing housing needs.