Accessory Dwelling Units (ADU)

On September 8, 2020,  the Rosemead City Council adopted Ordinance No. 995 to comply with the new state provisions for accessory dwelling units. The updated Ordinance will become effective on October 8, 2020.


picture of adu

An accessory dwelling unit (ADU) is an attached or detached structure that provides independent living facilities for one or more persons and includes permanent provisions for living, sleeping, eating, cooking, and sanitation on the same parcel as a single-family dwelling unit. They can have a separate mailing address and be rented to a third-party or occupied by a property owner(s).


The Planning Division has created a handout to assist property owners with development standards for ADUs. To view the handout, please click here.

For the full text and additional requirements, please see Rosemead Municipal Code Chapter 17.30.190.


An administrative site plan and design review must be submitted for review to the Planning Division prior to submitting for a Building Permit (as part of Building Plan Check process) to ensure compliance with the zoning regulations.

For more information, please contact the Planning Division at (626)569-2140.