Chapter 1: Understanding ADUs and Why They’re Booming in LA At its core, an Accessory Dwelling Unit is a secondary, self-contained housing unit located on the same lot as a primary single-family home. You might know them by other names like “granny flats,” “guest houses,” or “backyard cottages.” In Los Angeles, a combination of a … Continue reading The Ultimate Guide to Building an ADU in Los Angeles County (2025)