Haas Development & Construction is proud to offer the Greater Seattle community professional development and construction expertise to build an ADU configured for your unique property — either attached (AADU) or detached (DADU) from your home. Our team is dedicated to constructing your ADU unit with your primary goal in mind and can customize the build to meet your individual needs.
For any of our ADU projects, our first step will be confirming the ADU plan, property configuration, and permitting. Once those details are set, our expert team of contractors and engineers will handle everything from excavation or demolition; through concrete and framing; electrical, plumbing, and mechanical engineering and implementation; all the way to final finishes.
When you work with Haas, you choose building experience. Whether you are looking for a completed move-in ready ADU or would like to partner alongside us to customize your ADU build in Seattle, we will work with you to find the best construction approach.