Can I use off-the-shelf plans for an ADU?
Last Updated June 24, 2026
ADUs designed to suit an existing property are generally more functional and create more resale value. However, the City of Seattle and some Oregon municipalities offer pre-approved plans for Detached ADUs to streamline permitting, and plan sets are available from various sources. Your Neil Kelly design consultant can help you choose a starting point that meets your project vision and goals.
Still have questions?
Talk through your project with a Neil Kelly designer — no pressure, no obligation.