Accessory Dwelling Unit (ADU)

Accessory Dwelling Units (ADUs) (also referred to as Granny Units, Companion Units and Second Dwelling Units) are generally defined as a dwelling unit on a residential lot in addition to a primary dwelling. An ADU provides independent living facilities for one or more persons and includes permanent provisions for living, sleeping, cooking and sanitation. The State of California passed legislation requiring all jurisdictions to update their ADU ordinances by Jan. 2017, liberalizing requirements for ADUs. Mountain View has updated its ordinance, but Los Altos and Los Altos Hills haven’t done so yet. Los Altos Hills uses ADUs to comply with its RHNA allocation, regardless of whether the units are occupied by low-income households or not.

Synonyms:
Granny Unit,Companion Unit,Second Dwelling Unit
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