zoning; housing; historic neighborhoods

This bill requires Arizona municipalities with over 75,000 residents to permit duplexes, triplexes, fourplexes, and townhomes in two specific areas by January 1, 2026: (1) all single-family zones within one mile of downtown, and (2) at least 20% of new developments over 10 acres. It prohibits local governments from discouraging these housing types through excessive rules, such as requiring more parking than single-family homes or applying commercial building codes. The bill excludes historic districts (per state law), areas without water/sewer services, airport zones, and unincorporated areas. If a municipality fails to adopt these rules by 2026, middle housing becomes allowed everywhere zoned for single-family homes.