3 Best ADU Builders in Bellevue, Washington
Verified ADU contractors and builders in Bellevue, WA
Showing 1–3 of 3 listings
New Day Construction
New Day Construction specializes in designing and building ADUs that maximize your living space, generate rental income, and increase your property’s value. They are a full-service remodeling expert in Bellevue.
Renovision Design & Build
Transform your underutilized garage into functional living space with expert garage-to-living-space conversions throughout the Bellevue area. Our specialized design and build team handles every aspect of your conversion project, from initial planning through final construction.
Volcano Builders
Transform your garage into functional living space with expert conversion services in the Bellevue area, from design through completion. Our specialized team handles everything from structural modifications to finishing touches, turning underutilized garages into bedrooms, home offices, or recreation areas.
Frequently Asked Questions — ADU Builders in Bellevue
How much does it cost to hire an ADU builder in Bellevue?
ADU construction costs in Bellevue, Washington vary widely depending on size, type, and site conditions. Detached ADUs typically range from $150,000–$400,000+, while garage conversions and attached ADUs can be more affordable. Contact multiple builders in Bellevue to get accurate quotes for your specific project.
How long does it take to build an ADU in Bellevue?
In Bellevue, the ADU construction timeline typically ranges from 6 to 18 months from permit application to move-in. Permitting alone can take 2–6 months depending on Washington local regulations. Prefab and modular ADUs often have faster timelines than site-built units.
Do I need a permit to build an ADU in Bellevue?
Yes, a building permit is required for ADU construction in Bellevue, Washington. Your ADU builder will typically handle the permit application as part of their service. Washington has adopted streamlined ADU permitting laws in recent years, which may reduce wait times.
What types of ADUs can be built in Bellevue?
Common ADU types in Bellevue include detached ADUs (backyard cottages), attached ADUs, garage conversions, basement conversions, and prefab/modular ADUs. The best type for your property depends on lot size, zoning, and budget. A local Bellevue ADU builder can advise on what's allowed on your specific parcel.