Arizona residential & ADU permit data
Statewide ADU and middle-housing reform in larger cities
Housing law
Arizona's HB 2720 (2024) requires municipalities with more than 75,000 residents to permit at least one accessory dwelling unit on lots where single-family homes are allowed; cities that did not adopt conforming rules by January 1, 2025 must allow ADUs on all residential lots.
Arizona's HB 2721 (2024) requires cities over 75,000 to allow 'middle housing' — duplexes through fourplexes and townhomes — by right near central business districts, with compliance by January 1, 2026. A separate 'Starter Homes Act' did not become law (vetoed in 2024, stalled in 2025).
Jurisdictions we cover
Why Igni for Arizona
A top-growth Sun Belt market reforming zoning in its largest cities
Track new ADU and middle-housing permits as the 2024 reforms take hold
Live now in Tempe via the City's open-data portal, with more metros expanding
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Sourced live from the City of Tempe ArcGIS open-data portal under CC BY 4.0 (© City of Tempe), plus Phoenix, Tucson and Mesa.
Informational only, not legal advice. Housing law changes — verify current statutes before relying on this.