ADUs and JADUs are an innovative, affordable, and effective option for adding much-needed housing in California. California’s recent changes to the laws regulating zoning and housing have made it easier to add an ADU or a JADU, or one of each, to your property.
What is an ADU?
An Accessory Dwelling Unit (ADU) is a self-contained secondary housing unit that is located on the building lot of a larger, primary, single-family home. ADUs are also known as granny flats, in-law units, backyard cottages, and secondary units.
An ADU can add value to your property and can be a private residence for a family member or a second source of income.
What is a JADU?
A Junior Accessory Dwelling Unit (JADU) is a unit of no more than 500 square feet that is created within the walls of a proposed or existing single-family residence. JADUs may share a bathroom with the primary dwelling, share central systems, and contain a basic kitchen utilizing small plug-in appliances. JADUs repurpose existing space within the residence. They do not expand the dwelling’s planned occupancy and therefore present no additional stress on utility services or infrastructure.
California ADU Handbook
For more information about changes to the California State ADU Law – including the impacts of SB 9 on ADUs that became effective January 1, 2022 – please see the updated ADU Handbook: Accessory Dwelling Unit Handbook (PDF).
For additional assistance, please contact HCD’s ADU team.
California ADU Grant Program
The California Housing Finance Agency (CalHFA) offers grants of up to $40,000 to reimburse pre-development and non-recurring closing costs of constructing an ADU.
Homeowners with low or moderate income – which is $300,000 in the counties of Santa Clara and San Mateo – can apply for a grant. Please see an income limit chart here: CalHFA Income Limits
CalHFA is not a direct lender. Its mortgage products are offered through private loan officers who have been approved and trained by the Agency. These loan officers can help you find out more about CalHFA’s programs and guide you through the ADU loan and grant processes, You can find more information about the grant application process here: https://www.calhfa.ca.gov/adu/homeowner/adu-steps.pdf
If you are considering building an ADU or a JADU, you might enjoy reading the article 5 Things to Know Before Adding an Accessory Dwelling Unit to Your Property, by Bob Vila, host of the television program, This Old House: https://www.bobvila.com/articles/accessory-dwelling-unit/
Please contact Bay Area Design & Construction to discuss your proposed project.
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