Arizona Middle housing (HB 2721, 2024): what it allows on a lot
Middle housing (HB 2721, 2024) is Arizona law, and the official source is at azleg.gov.
The same cities had to allow duplexes, triplexes, fourplexes, fiveplexes and townhomes on single family lots within a mile of the central business district, and on a fifth of new developments over 10 acres, by January 1, 2026, with no more than one parking space a home.
Whether it applies to one lot turns on where the lot is and what it is zoned; the city, county or state office named in the law decides. Mapped areas are approximate. This is a plain reading of public law with its source, not legal advice.
Free, no account. ParcelSheet shows the lot's mapped size, parcel lines and flood zone, and this law on the lot's Arizona sheet.
Other Arizona laws on a lot: ADU law in cities over 75,000 (A.R.S. 9-461.18).