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ADU Builders in Bellevue, WA

3 vetted ADU and DADU builders serving Bellevue and the surrounding Puget Sound area. Compare ratings, price ranges, and specialties, then request free quotes.

Bellevue sits at the heart of King County's Eastside, where high property values make an ADU one of the strongest ways to add rental income or multigenerational living space. Since Washington's HB 1337 removed owner-occupancy and parking mandates statewide, Eastside homeowners have far more flexibility to add a detached DADU or attached unit. The builders below work throughout Bellevue and the surrounding Eastside communities.

BLC Remodeling

Bellevue, WA
★★★★★ 5 (26 reviews)

14+ years experience. Specializes in ADUs and home additions. Compliance with Seattle housing laws. Custom designs. Serves Eastside and Greater Seattle.

Detached ADU Attached ADU Garage Conversion Basement Conversion
Contact for pricing View Profile

Brutsky Builds

Bellevue, WA
★★★★★ 5 (100 reviews)

Licensed, insured, bonded. Free estimates. Premium materials. ADU design and construction from start to finish. Multiple office locations in Bellevue and Kirkland.

Detached ADU Attached ADU Custom Design
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NW Finishing

Bellevue, WA
★★★★★ 5 (15 reviews)

Founded 2006 by Ivan Turchik. Leading ADU builder in Bellevue and surrounding areas. Deep knowledge of local zoning laws. Transparent pricing.

Detached ADU Attached ADU Cottage ADU Prefab ADU
$150,000-$400,000+ View Profile

ADU guides for Bellevue

ADU FAQs for Bellevue

Can I rent out an ADU in Bellevue?

Yes. Since HB 1337 removed statewide owner-occupancy and most ADU-specific parking mandates, Bellevue homeowners can rent an accessory dwelling unit for long-term income. Given Eastside property values, an ADU is one of the higher-return additions in the area.

Who handles ADU permits in Bellevue?

ADU permits in Bellevue are reviewed by the City of Bellevue's Development Services / Permit Center. Requirements cover setbacks, height, and utility connections, and a detached DADU is reviewed separately from an attached unit.

What's the difference between an attached ADU and a DADU in Bellevue?

An attached ADU shares a wall with or is built inside the existing home (such as a basement or above-garage unit), while a DADU is a standalone backyard cottage. Both are allowed on most Bellevue lots under HB 1337; the right choice depends on lot size, budget, and privacy goals.

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