ADU & DADU Construction in Seattle & King County

Custom ADU & DADU Construction for Modern Living

An ADU (Accessory Dwelling Unit) or DADU (Detached Accessory Dwelling Unit) is one of the most effective ways to increase living space, boost property value, and create opportunities for rental income, multi-generational living, or a private workspace. At Bello Home Solutions, we specialize in ADU and DADU construction throughout King and Snohomish County, while also providing expert home additions and whole-home remodeling services to help homeowners maximize their property’s potential.

From initial planning and permitting to final construction, our team manages every phase of the project with clear communication, detailed project oversight, and quality craftsmanship. Whether you’re building a detached backyard cottage, expanding your existing home, or planning a complete home transformation, Bello Home Solutions delivers spaces that are functional, beautiful, and built to last.

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Why ADUs & DADUs Are a Smart Investment in Seattle

The Seattle area continues to see strong demand for ADUs (Accessory Dwelling Units) and DADUs (Detached Accessory Dwelling Units) as housing costs rise and homeowners look for flexible living solutions. Whether you are creating space for family members, generating rental income, or increasing long-term property value, a well-designed accessory dwelling unit can deliver significant benefits. Homeowners throughout King and Snohomish County are investing in ADUs and DADUs to maximize the potential of their properties while meeting evolving housing needs. Bello Home Solutions manages every stage of the process—from planning and permitting to construction—so you can focus on enjoying the results.

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Frequently Asked Questions

Q: What is the difference between an ADU and a DADU?

A: An ADU (Accessory Dwelling Unit) is typically attached to or within the primary home. A DADU (Detached Accessory Dwelling Unit) is a fully separate structure on the same property, like a backyard cottage or garage conversion.

Q: Do I need a permit to build an ADU in Seattle or King County?

A: Yes, permits are required. We manage the permitting process as part of the project and are familiar with local requirements across King and Snohomish County jurisdictions.

Q: How long does it take to build an ADU or DADU?

A: From planning through construction, most ADU and DADU projects take several months. We give you a clear timeline at the start and keep you updated throughout.

Ready to Build an ADU or DADU on Your Property?

Whether you’re planning a private living space for family, creating a rental income opportunity, or increasing your property’s long-term value, Bello Home Solutions is here to guide you through every step of the process. From design and permitting to construction and final inspections, our team delivers a seamless experience for homeowners throughout Seattle, King and Snohomish County.

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