Accessory Dwelling Unit Construction in Boise, Idaho

Your Trusted ADU Experts in the Treasure Valley

At BuilditUSA, LLC, we specialize in building high-quality Accessory Dwelling Units (ADUs) that add value, flexibility, and comfort to your property in Boise, ID. With over 44 years of experience in the construction industry, we understand the unique needs of homeowners in the Treasure Valley and provide expert guidance from start to finish. Whether you’re looking to create a rental property, add living space for family, or increase the value of your home, we make the ADU construction process straightforward and stress-free.

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What Is an ADU and Why Build One?

An Accessory Dwelling Unit, also known as a backyard cottage, in-law suite, or secondary dwelling, is a smaller living space built on the same property as your primary residence. Boise residents are increasingly turning to ADUs as a smart investment. With rising housing demand and property values in Ada County, ADUs offer flexible solutions—whether it’s generating rental income, providing a comfortable space for aging parents, or giving college students an affordable place to live close to home.



Tailored to Boise’s Needs

Boise has its own zoning codes, permitting requirements, and design standards when it comes to ADU construction. Our team at BuilditUSA, LLC has decades of experience working with the City of Boise and surrounding municipalities, ensuring your ADU project meets all local regulations. From site preparation and utility connections to architectural design and finishing touches, we manage every step with precision. By handling the permitting process on your behalf, we remove one of the biggest obstacles homeowners face when considering an ADU.


Comprehensive ADU Construction Services

Our team provides full-service ADU construction, including:

  • Custom Design & Planning – We work with you to create an ADU that fits your property, lifestyle, and budget.
  • Permitting & Compliance – We navigate Boise’s permitting process to ensure your ADU project is fully approved.
  • Quality Construction – From the foundation to the roof, we use durable materials and proven techniques to deliver lasting results.
  • Interior Finishes – Kitchens, bathrooms, flooring, and trim work are crafted with attention to detail and style.
  • Utility Connections – Our skilled team integrates plumbing, electrical, and HVAC systems to create a fully functional living space.


The BuilditUSA, LLC Advantage

With over four decades of hands-on experience, we’ve seen how construction trends and housing needs have evolved in the Boise area. Our knowledge allows us to recommend the most effective designs, cost-saving measures, and construction methods for your ADU. We also understand the local climate—cold winters, hot summers, and everything in between—which means we build ADUs that are energy-efficient and built to withstand Idaho’s conditions.


Adding Value to Your Boise Property

An ADU is more than an extra building on your lot—it’s an investment in your property’s long-term value. Homeowners across Boise are discovering how ADUs can provide steady rental income, increase resale value, and create flexible living options for generations to come. By partnering with BuilditUSA, LLC, you gain a trusted local builder with the experience and dedication to turn your vision into reality.


Start Your ADU Project Today

If you’re considering building an ADU in Boise, ID, let our expertise guide you through the process. At BuilditUSA, LLC, we combine over 44 years of construction experience with a deep understanding of local codes and homeowner needs. We’re committed to building spaces that improve your lifestyle and add value to your home.

FAQ'S

  • What are the zoning requirements for building an ADU in Boise, ID?

    In Boise, ADU construction must follow specific zoning regulations set by the City of Boise. These rules cover property size, setbacks, maximum square footage, parking requirements, and whether the ADU can be attached or detached. At BuilditUSA, LLC, we have extensive experience working with local zoning codes and can help you design and build an ADU that complies with Boise’s requirements.

  • How long does it take to build an ADU in Boise?

    The timeline for ADU construction in Boise typically ranges from four to eight months, depending on the complexity of the project, permitting timelines, and availability of materials. Our team handles every step, from design and permitting to construction and finishing, ensuring your project moves smoothly and efficiently.

  • Can I rent out my ADU in Boise, ID?

    Yes, many homeowners in Boise choose to use their ADUs as rental properties. Boise’s growing housing market makes ADUs a smart investment for generating rental income. However, short-term rentals like Airbnb may have different rules. We can advise you on how your ADU can be used legally while maximizing your property’s value.

  • What types of ADUs are most common in Boise?

    In Boise, the most common types of ADUs are garage conversions, detached backyard cottages, and basement conversions. Each type has unique benefits depending on your property layout, budget, and long-term goals. BuilditUSA, LLC designs and constructs all types of ADUs, helping you select the option that best fits your needs.

  • How much does it cost to build an ADU in Boise, ID?

    The cost of an ADU in Boise varies depending on the size, type, and level of finishes you choose. On average, Boise homeowners can expect ADU construction to range from modest garage conversions to fully customized detached units. With over 44 years of construction experience, we provide accurate estimates and value-driven solutions to keep your ADU project within budget.