Do you know what an ADU is?  It stands for Accessory Dwelling Unit.  These units are separate living spaces within a home or on the same property as an existing home.  They’re sometimes called backyard cottages, carriage houses, granny flats, mother-in-law apartments, and in Canada they’re called lane houses. They are further defined as an Attached Accessory Dwelling Unit (AADU) or a Detached Accessory Dwelling Unit (DADU). The property pictured above is actually 3 homes (technically they’re zoned as condominiums). The primary home (called an SFR – Single Family Residence), is about 1,800 sf and is on the left...