UPDATE: see this post for current ADU regulations in California
Currently, there are three types of zoning available:
1) Home Care Cottages: These units can be used as a cottage for Caregivers, Elders, the Disabled – or a person who simply needs some care.
2) Additional zoning is available in most counties which allows an owner to live in a Little House/Certified RV for up to three years on a property where the owner has pulled permits to build or renovate a main house on the same property.
3) This is brand new zoning – but the city of Rohnert Park has recently permitted a Small House within city limits. Information on this new zoning will be included workshops starting in Oct of 2016.