ADU (Accessory Dwelling Unit / Casita) & Arizona HB 2720
Bottom Line Up Front: Arizona HB 2720 mandates that cities with 75,000+ residents permit at least one attached and one detached ADU (up to 75% of primary home square footage or 1,000 sq ft) on single-family lots.
Formula / Statutory Rule
Up to 1,000 Sq Ft Detached Casita + 3rd ADU on Lots ≥ 1 AcreScottsdale & Greater Phoenix Benchmark (HomeDaddy AI)
Adding a 650–950 sq ft luxury detached guest casita in Arcadia, North Scottsdale, or Tempe adds $225,000–$410,000 in ARV and $2,400–$4,200/mo in rental revenue.
Stephen R. Mannenbach is a Licensed Real Estate Salesperson / REALTOR® in the State of Arizona (ADRE #SA713873000), brokered by HomeSmart LLC. Equal Housing Opportunity. All property square footage, HOA fees, school boundaries, business financials, and market statistics are deemed reliable but not guaranteed and should be independently verified through ARMLS and Maricopa County records.