What is an ADU?
An accessory dwelling unit (ADU) also known as "second unit" or "granny flat", is a residential unit that can be added to a lot with an existing single family home. A California law (AB 2299) makes it easier for homeowners to construct these small residences to address the State’s housing shortage. Building an ADU requires a lot of knowledge and can be costly. There are specific requirements and standards for the construction of an ADU.