The Second Unit Center is a program of the County of San Mateo’s Home for All initiative providing information and tools to make it easier for homeowners to build second units, to help increase the housing supply in the County.
Second Units are a great option for those interested in affordably housing a friend or family member, aging in place, creating a new income source, and helping tackle our regional housing shortage.
Are you interested in building a second unit? Identify next steps, including how to find the right kind of second unit for your situation, how to secure a building permit, and how to find your construction team.
