From Outdated Garage
to Rentable Housing
Increase Your Income with an
Accessory Dwelling Unit
Garage Conversions & ADU's
Garage Conversions & ADU's
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Transform Your Garage Into A Rentable
Accessory Dwelling Unit or Family
Entertainment Zone!

Treeium Garage Conversions are eco-friendly, innovative, and transform your existing home space into a modern Accessory Dwelling Unit (ADU), perfect for hosting and entertaining family and friends, or as rentable apartment homes for extra income.

At Treeium, our contractors will work with you throughout the scope of your project, from drawings and design, to your floor plan and custom construction.
Because ADU’s are built using existing garage spaces, the process is hassle-free and requires no new construction.

Throughout the process, homeowners in the State of California are given the peace of mind that your project is in the great hands of our professional artisans, and that when all is said and done, you will have a beautiful Accessory Dwelling Unit that will increase the value of your home when it’s time to sell!
The choice between an Accessory Dwelling Unit and Junior Accessory Dwelling Unit really comes down to size.

JADU’s must be no larger than 500 square feet and only include small, plugable kitchen appliances like microwaves, stove tops, and toaster ovens.

An ADU, however, is far more flexible, allowing for a size no less than 850 square feet for a one bedroom and 1,000 square feet for larger than a one bedroom.
Get inspired by our projects
Second Story ADU Addition
Sherman Oaks, CA
Second Story ADU Addition
Sherman Oaks, CA
Project Videos
Second Story ADU Addition
Sherman Oaks, CA
Garage Conversion ADU
Burbank, CA
ADU and Major Renovation
Laguna Beach, CA
Benefits of an ADU
Allow homeowners to convert an existing space, like a garage, for their use or to rent and earn extra income.
Construction is affordable as it occurs on existing land - no land purchasing required!
Great for families with aging parents or grandparents who need in-home care.
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A private space to entertain extended family, friends, or a time out space for when the kids won’t settle down!
Increases the value of your existing home and property!


See what our clients have to say !
I will absolutely recommend Treeium. To everyone!
Demetra Powell Full House Renovation - Mission Viejo, CA
Add comfort and value to your home with a room addition!
Addition Time Lapse
My project manager and the entire construction crew was wonderful to work with, their knowledge and expertise made it a very easy process.
Sulagna Misra Complete Home Remodel - Customer Testimonial
We couldn't have asked for a better remodeling experience. We really love our kitchen!
Silvia Carroll Kitchen Renovation
We designed a new type of residential project in Sherman Oaks, CA for one of our very talented clients Kathryn Pitt
Second Story ADU Addition - Client Testimonial
This dreamy beach house is quite the reality check out this stunning ADU and major renovation on this beautiful hippie chic beach abode in Laguna Beach, CA
Project Walk-Through
Checkout this large trendy I-shaped open concept kitchen and whole home remodel and let us know what you think....
Complete Home Remodel Before + After Transformation

Our Financing Options

Our Financing options

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