Permitting for an ADU in Washington typically takes 2 to 4 months, but timelines can vary depending on your local jurisdiction, the complexity of your project, and how complete your initial application is. In high-demand cities or during busy seasons, it can take longer—sometimes up to 6 months. Working with an experienced team can help streamline the process and avoid delays.

No, you don’t need to be home during construction. Our licensed crews handle everything according to the approved plans and schedule, and we keep you updated throughout the process. That said, we may occasionally need access to certain areas or to confirm details, and we’ll always coordinate with you in advance!

In Washington State, most properties zoned for single-family use are allowed to build at least one ADU, as long as they meet local lot size, setback, and coverage requirements. Generally, you’ll need enough space in your backyard or attached to your home to meet the minimum setback distances (typically 5–10 feet from property lines) and stay within your city’s maximum lot coverage rules. We're ready to help you figure this out with a free property analysis!

Permit and utility hookup costs for an ADU in Washington can vary widely depending on your city and the scope of your project.The best way to get a firm estimate for these costs is to set up a Property Analysis with our team!