Accessory Dwelling Unit (ADU) is a smaller, secondary home on the same lot as a primary dwelling. ADUs are independently habitable and provide the basic requirements of shelter, heat, cooking and sanitation.”
An ADU may be created through new construction, the conversion of an existing structure, as an addition to an existing structure or as a conversion of a qualifying existing house during the construction of a new primary dwelling on the site.
The ordinance limits the square footage of a detached ADU to no more than 50% of the square footage of the existing single-family home, while allowing an ADU of at least 640 square feet but no more than 1,200 square feet.
Accessory Dwelling Units (ADUs) are known by many names: granny flats, in-law units, backyard cottages, secondary units and more. No matter what you call them, ADUs are an innovative, affordable, effective option for adding much-needed housing in California
- 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.