Budget Breakdown: Here’s What It Cost to Build Two ADUs on the Same Bay Area Block

In 2019, Susan and Chuck Webb relocated from Bowling Green, Kentucky, to Berkeley, California, to be closer to their daughter and grandson. The retired couple soon realized they’d need more space than their century-old, 1,300-square-foot craftsman bungalow could provide in order to spread out, host out-of-town visitors and, perhaps eventually, accommodate a live-in caretaker.