Peoria, AZ Accessory Structures: ADU Rules (2026)

Section 21-316 lets a single-family lot in Peoria add up to one attached and one detached accessory dwelling unit by right, without a public hearing or variance, as long as adequate public utility service exists. On a lot of one acre or larger, an owner can add a second detached ADU, but only if at least one of the two detached units is a restricted-affordable unit, meaning it carries a deed restriction or development agreement committing it to households earning up to eighty percent of area median income.

2: it cannot exceed seventy-five percent of the existing single-family home's gross floor area, or 1,000 square feet, whichever number is smaller. a; the front setback still follows the district's standard for the principal dwelling. An ADU cannot go on a lot with a duplex or other multifamily development, cannot be built before the single-family home it serves, and cannot be a mobile home, RV, or other movable structure. No extra parking is required for an ADU, but a property owner cannot sell or convey the ADU separately from the primary house, and a lot split that would leave the ADU on its own parcel has to bring both the new primary unit and the ADU into full utility and occupancy compliance first. 18, wherever the two conflict.