ADU Resources

Southern California ADU Requirements & Resources

Planning an Accessory Dwelling Unit (ADU) or Junior Accessory Dwelling Unit (JADU)?

Below are official ADU resources from the State of California and local jurisdictions throughout Southern California. These resources can help property owners find current information regarding ADU requirements, development standards, applications, permitting, and other jurisdiction-specific requirements.

California Statewide Los Angeles County Orange County San Bernardino County Riverside County San Diego County Ventura County

Because ADU regulations and local procedures may change, always verify current requirements directly with the applicable city or county before beginning your project.

California Statewide ADU Resources

California Department of Housing and Community Development (HCD)California ADU Resources & ADU Handbookhcd.ca.gov

Los Angeles County

Los Angeles CountyAccessory Dwelling Unit Resourcesplanning.lacounty.gov City of Los AngelesLADBS Accessory Dwelling Unitsdbs.lacity.gov BurbankAccessory Dwelling Unit Requirements & Applicationsburbankca.gov PasadenaAccessory Dwelling Unit Resourcescityofpasadena.net

Orange County

Orange CountyAccessory Dwelling Unit Resourcespwds.oc.gov AnaheimADU & JADU Municipal Code Requirementscodelibrary.amlegal.com Costa MesaAccessory Dwelling Unit Resourcescostamesaca.gov FullertonAccessory Dwelling Unit Regulationscityoffullerton.com Garden GroveAccessory Dwelling Unit Resourcesggcity.org IrvineConstructing an Accessory Dwelling Unitcityofirvine.gov

San Bernardino County

San Bernardino CountyADU Handouts & Building Resourceslus.sbcounty.gov Chino HillsAccessory Dwelling Unit Requirementschinohills.org OntarioAccessory Dwelling Unit Resourcesontarioca.gov Rancho CucamongaPlanning Resources & ADU Informationcityofrc.us

Riverside County

Riverside CountyPermit-Ready ADU Program & Submittal Resourcesbuilding.rctlma.org City of RiversideADU & JADU Planning Resourcesriversideca.gov CoronaADU Guide Sheets & Planning Formscoronaca.gov TemeculaAccessory Dwelling Unit Requirementstemeculaca.gov

San Diego County

San Diego CountyAccessory Dwelling Unit Informationsandiegocounty.gov City of San DiegoADU & JADU Requirements — Information Bulletin 400sandiego.gov Chula VistaAccessory Dwelling Unit Permit Informationchulavistaca.gov

Ventura County

Ventura CountyAccessory Dwelling Unit Planning Resourcesrma.venturacounty.gov CamarilloBuilding an Accessory Dwelling Unitcityofcamarillo.org Thousand OaksAccessory Dwelling Unit Resourcestoaks.gov City of VenturaAccessory Dwelling Unit Resourcescityofventura.ca.gov

Please note

Important information

The resources provided on this page are for general informational purposes and link to external government websites or official municipal code resources.

ADU laws, local development standards, permit requirements, fees, procedures, and interpretations may change. Property-specific conditions, zoning, overlays, easements, fire requirements, utilities, site conditions, and other regulations may also affect what can be constructed on a particular property.

Always confirm current requirements with the applicable city, county, planning department, and building department before proceeding with a project.

Design Compliance Studio is not affiliated with any of the government agencies listed on this page. Providing a link to an agency or resource does not constitute a guarantee of project eligibility, permit approval, processing time, or interpretation of applicable regulations.

Need help with your ADU?

We can help you plan and permit it

Design Compliance Studio provides residential design documentation, code compliance assistance, permit coordination, and permit processing support throughout Southern California.

We can help you research the applicable requirements, prepare your residential plans, coordinate required project documentation, and assist with the permit process.

Call 909-774-6151 Email us

Design Compliance Studio

Southern California
Phone: 909-774-6151
Email: miguel@designcompliancestudio.com
Website: www.designcompliancestudio.com

Design Compliance Studio provides residential design, drafting and permit processing services. Permit issuance and timelines are determined by each jurisdiction and are not guaranteed.