ADU’s & Additions in Spokane, Washington


The Building Company specializes in designing and constructing Accessory Dwelling Units (ADUs) and custom home additions, providing homeowners in Spokane, Washington, and surrounding areas with high-quality, versatile living spaces tailored to their unique needs. With over 15 years of experience, we have the expertise to transform your property with thoughtfully designed expansions that offer additional income potential, multi-generational living solutions, or private guest accommodations.

Our team understands that every ADU or home addition project comes with unique requirements and goals—from creating a rental unit to expanding your home for extended family living. We approach each project with a personalized plan that balances both aesthetic and functional considerations, ensuring the new space integrates seamlessly with your existing home while providing comfort, privacy, and long-term value. Our goal is to create ADUs and additions that are both stylish and highly functional, with layouts that maximize space efficiency, natural light, and accessibility.



At The Building Company, we handle every step of the ADU and home addition construction process, from initial design and planning to permitting and final construction. Navigating local zoning regulations and building requirements can be complex, but our experienced team is well-versed in Spokane, Washington building codes for both ADUs and residential additions. We manage all paperwork and compliance details, allowing your project to move forward smoothly while meeting all local regulations.

Our construction services include everything from foundational work, framing, and roofing to the interior finishes that make a space feel like home. Whether we’re building a detached ADU or expanding your existing living area, we use high-quality materials and energy-efficient solutions to ensure durability and sustainability. From kitchens and bathrooms to open living areas and smart storage solutions, we focus on craftsmanship, comfort, and thoughtful design. If your project requires specific accommodations, such as accessibility features or custom layouts, we tailor every detail to meet your needs.


With a commitment to transparency and clear communication, The Building Company makes the ADU and home addition process as seamless as possible. We provide accurate estimates, consistent updates, and careful project management to ensure your project stays on schedule and within budget. Our dedication to quality workmanship and customer satisfaction has made us a trusted partner for ADUs and home additions in Spokane, Washington. Contact The Building Company today to explore the possibilities of expanding your home and bringing your vision to life.

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