CA AB2890

Prohibits local agencies from imposing minimum lot size, lot coverage, or floor area ratio requirements on accessory dwelling units, and requires size standards to permit at least 800 square feet units at least 16 feet in height.

Reduces approval timeline for accessory dwelling unit permit applications from 120 days to 60 days for local agencies with or without existing ordinances.

Allows ministerial approval of multiple accessory dwelling units (not just one) on single-family and multifamily lots under specified conditions, including detached units up to 800 square feet and units within existing structures.

Eliminates parking requirements for accessory dwelling units located within one-half mile of public transit, in historic districts, within primary residences, where on-street permits are required but not offered, or where car-sharing is available.

Requires local agencies to apply uniform standards for junior accessory dwelling units (units no more than 500 square feet within existing single-family structures) with approval within 60 days, and directs the Department of Housing and Community Development to create small building standards for accessory dwelling units by January 1, 2020.