The short answer is that most ADU projects in Portland take between 4 and 10 months from first consultation to move-in, depending on design complexity, permitting timelines, and construction scope.

However, the construction portion itself is typically much shorter. The majority of time in an ADU project happens during the design and permitting phases before construction begins.

While both an accessory dwelling unit (ADU) and a home addition expand your living space, they serve different purposes. In Portland, the decision often comes down to how you want to use the space: multigenerational living, rental income, or simply a larger home for yourself.

When considering an Accessory Dwelling Unit (ADU) in Portland, homeowners typically face a crucial decision: converting an existing garage or opting for a completely new, standalone ADU. Each option carries unique benefits, drawbacks, and costs. Carefully evaluating these factors will help you choose the solution best suited to your property and goals.