As a result of living in one of the most competitive housing markets in the United States, Seattle home buyers often seek out properties with ADUs, or accessory dwelling units. Perhaps even more appealing are DADUs, or detached accessory dwelling units. These standalone units generate extra monthly income and can help offset mortgage costs. Here are some of the more intriguing ones we've seen on the market lately. Let us know if you'd like a private tour of any of these homes.