Vashon Island is in King County, Washington, and Refine Design Architecture serves it as part of our work across Washington State. What we bring to Adu Design is a site-specific process led by licensed Washington State architects, with close work alongside you from the first call through the final construction drawing.
An ADU can take several forms. We design home additions including mother-in-law suites and accessory dwelling units, and we plan them as self-contained units with a kitchenette, bathroom, and living space. Some homeowners want rental income, some want to downsize, and some want space for extended family. Which Adu Design approach fits depends on your lot and your goals, so we begin with a conversation about how you live and what you value. We aim for ADUs that blend into existing homes and neighborhoods rather than feel tacked on.
Beyond the design itself, we can handle the practical steps. We offer feasibility studies that review height, floor area, setbacks, and critical areas, along with site analysis covering topography, drainage, and access. We prepare the building permit drawings and can either lead the permitting process or support you through it. We deliver construction drawings a general contractor can build from. To talk about your Vashon Island property, contact us to schedule a free consultation.
