Accessory Dwelling Units

Accessory Dwelling Units (ADU) and Junior Accessory Dwelling Units (JADU) are an innovative and effective option for adding much needed housing in California.

ADUs have been known by many names: granny flats, in-law units, backyard cottages, secondary units and more. HCD is the state’s leader on local ADU ordinances, which — while optional — have grown exponentially in number as more cities, counties, and homeowners become interested in ADUs as one solution to increasing the supply of affordable housing.

What are the benefits of ADUs?

• ADUs are an  affordable  type of home to construct in California because they do not require paying for land, major new infrastructure, structured parking, or elevators.

• ADUs can provide a  source of income  for homeowners.

• ADUs are built with  cost-effective wood frame construction, which is significantly less costly than homes in new multifamily infill buildings.

• ADUs allow  extended families  to be near one another while maintaining privacy.

• ADUs can provide as much  living space  as many newly-built apartments and condominiums, and they’re suited well for couples, small families, friends, young people, and seniors.

• ADUs give homeowners the  flexibility  to share independent living areas with family members and others, allowing seniors to age in place as they require more care.