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

In Berkeley, California, Type Five builds a pair of backyard houses—for $196K and $229K—for separate families within 100 feet of each other.
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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.

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