Accessory Dwelling Unit (ADU)

Welcome to the City of Oceanside's Accessory Dwelling Unit (ADU) resource page. The information on this page is intended to help Oceanside residents understand zoning regulations, building codes, and the process for constructing an ADU in the City of Oceanside. 

Thank you to all of the residents who attended the ADU Workshop on November 12, 2019 in the City Council Chambers. The City of Oceanside, in partnership with the ADU Coalition of San Diego and AARP California,  conducted the public workshop to inform residents about the development regulations and process for constructing an Accessory Dwelling Unit (ADU) in the City of Oceanside. Topics included:

  • An overview of new ADU legislation (SB 68, SB 13, AB 881, AB 587, & AB 671)
  • City regulations and incentives
  • Guidance through the permitting and construction process
  • An overview of cost and financing

The City will post an overview of the new state ADU legislation that will go into effect on January 1, 2020 in the coming weeks. The City's existing ADU ordinance will remain in effect until the end of the year.


The State legislature enacted ADU legislation in 2017 and 2018 (SB 1069, AB 2299, SB 229, & AB 494)  with the intent to reduce regulatory barriers and costs, streamline approval, and expand the potential capacity for ADUs in response to California's housing shortage. The City Council adopted revised ADU regulations on August 9, 2017 and May 9, 2018, conforming to the provisions of Government Code Section 65852.2 as mandated by state law.

The City's Accessory Dwelling Unit Ordinance is located in Article 30, Section 3006 of the Zoning Ordinance. Key revisions to the ordinance include the waiver of certain development impact fees, flexible parking requirements or parking waivers, and a streamlined permit review process.

Please review the ADU Informational Guide and Fact Sheet as well as Visualizing the Code video featured on the resources page. For additional information regarding ADU regulations, please contact the Planning Division or visit the Development Services Department at 300 North Coast Highway.