INLAWS, OUTLAWS AND GRANNY FLATS: Your guide to creating an ADU Homeowners are creating second dwelling units often called Accessory Dwellings, ADUs, in-law suites, mother-in-law apartments, or granny flats. Second units make a lot of sense. They're perfect for families who want several generations living close by, they enable Baby Boomers to care for elderly parents while respecting their independence,...