ADU ROI
So how much rent can a Boise ADU generate and is the investment to build an ADU worth it? The answer is -- it all depends on your specific situation and financing you have available, but let's look at an example using realistic figures below.
Data Example
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Build Cost: $220,000, cash investment
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Monthly Rent: $1,800
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Annual Rent: $21,600
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Operating Expenses: $3,200
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Net Annual Income: $16,600
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Cash-on-Cash Return: ~8.4%
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Equity Increase: $220,000
Disclaimer:
The figures shown are for illustrative purposes only and do not represent guaranteed results. This information is not financial advice. Actual costs and returns may vary. Please consult with a qualified financial advisor to evaluate your specific situation.
A standalone small home built in your backyard. Offers the most privacy and design flexibility.
Perfect for: rental income, guest suite, or downsizing.
Detached ADU
An addition that shares one wall with your main home. Provides easy access and efficient construction.
Perfect for: parents, home offices, or guest quarters.
Attached ADU
Above Garage ADU
Adds livable space above a new or existing garage — ideal for narrow lots or maximizing urban space.
Perfect for: smaller lots, town homes, and homes that don't currently have a garage.
Garage Conversion ADU
Convert an existing garage into a modern, efficient studio or one-bedroom unit.
Perfect for: quick builds and budget-friendly projects.
Types of ADUs
Each property and lifestyle is unique. Explore the four most common ADU types to find the right fit for your space, design goals, and budget.
More Treasure Valley homeowners are building ADUs than ever. In Boise specifically, zoning updates have made it easier and more profitable to add livable space or generate rental income without buying new land.
Key Benefits of Building an ADU
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💰 Generate Rental Income – Turn your backyard into an income stream.
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🏡 Increase Property Value – ADUs add resale appeal and market versatility.
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👪 Multigenerational Living – Keep family close while maintaining privacy.
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🌿 Sustainability – Efficient use of land and infrastructure.
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🏙️ Zoning-Friendly – Boise has expanded where ADUs are allowed and these incentives may not last much longer.
Why Build an ADU in Boise
Testimonials
ADU costs vary depending on size, finishes, and site work — but most Boise builds range between $175,000 and $300,000+.
Typical ADU Build Costs
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Studio ADU: $175K–$210K
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1-Bedroom ADU: $200K–$250K
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Garage w/ 1 Bedroom ADU Above: $225k-$300k
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2-Bedroom ADU: $250K–$300K+
ADU Financing Options
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Home Equity Line or Cash-Out Refi – Use your home’s equity.
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ADU Construction Loans – Short-term loans rolled into permanent financing.
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ADU-Specific Lending Programs – Designed for homeowners adding secondary units.
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Family or Investor Partnerships – Share costs and profits.
Our ADU Process
We’ve simplified ADU design and construction into a clear, proven process.
Step by Step Overview
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Free Consultation & Site Analysis – Evaluate your lot and determine feasibility.
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Project Development – Choose layout, finishes, and confirm budget.
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Permitting – We manage all drawings and city submittals.
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Construction – Our build team delivers precision craftsmanship.
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Final Walkthrough & Move-In – Enjoy your new space or start renting.
Jennifer Homes
Hands down one of the best general contractors we have used! Thank you Kole and team for your hard work and dedication. Our home remodel turned out great
Michelle Graves
Awesome experience with our bathroom remodel. Very timely, good communication and quality construction!!
Robert Hensel
Kole and his team are top notch! From start to finish they make sure the client comes first! From a small bathroom remodel to complete home remodel Mode remodel can handle it! I would highly recommend them…
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Have more questions or interested in the next step? Mode Homes is proud to serve Boise homeowners with ADU building services that combine craftsmanship, creativity, and transparency. Call us today at 208-280-9213, kole@modehomesid.com, or request your free consultation online.
Ready to Get Started?
Boise ADU Cost & Financing
What is an ADU?
(And Why Build One?)
An Accessory Dwelling Unit (ADU) is a fully independent living space located on your property—perfect for family, guests, or rental income. Each ADU includes its own bathroom and at least a kitchenette, often a complete kitchen. At Mode Homes, we take care of design, permitting, and construction, turning unused space into a finished ADU that adds comfort, flexibility, and long-term value to your property.
Common Uses
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Housing for aging parents
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Rental income
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Guest House or Home Office
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Property Value & Flexibility