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Building an DADU in Ballard: What Homeowners Need to Know in 2025

If you live in Ballard, you’ve probably noticed more homeowners adding backyard cottages and basement apartments to their properties. These small secondary homes—called Accessory Dwelling Units (ADUs) and Detached Accessory Dwelling Units (DADUs)—are transforming Seattle neighborhoods by creating flexible living space and new income opportunities.   In