Chuck C.
6/4/2025
I recently hired custom adu builder to do a full interior remodel of our rental property, and I can confidently say it was one of the best decisions I made. This is not my first remodel and I...
Custom ADU Builder
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Fullerton, CA 92833
Custom ADU Builder is a full-service construction company specializing in the design and construction of accessory dwelling units (ADUs) in Orange and Los Angeles Counties. With over 20 years of experience, they offer superior workmanship, affordable pricing, and a commitment to completing projects on time and within budget.
From garage conversions to detached and attached ADUs, Custom ADU Builder has the skills and expertise to deliver exceptional results. Their team of professionals handles every aspect of the project, including design, engineering, permits, foundation, framing, drywall, interior work, and electrical and plumbing installations.
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Reviews
4.512 reviews
Christopher M.
5/16/2025
Dennis and his team converted our old 400 sq ft detached garage into a beautiful ADU that worked within our budget. He went off of plans that we originally got from an architect, but honestly if I...
Courtney S.
2/14/2025
Start to finish, Dennis and his team, were excellent! Custom ADU Builders recently completed my 860 sqft ADU in Los Angeles. The team does excellent work, is professional, and easy to work with....
Nicole M.
10/29/2023
Custom ADU builder did our 2 car garage conversion to a 1bedroom-1bathroom ADU. I'm a realtor and know many contractors and have also heard of the horror stories from others and their experiences...
David G.
8/27/2023
Dennis and his crew at Custom ADU Builder are top notch. He will go out to your property and provide a free estimate for your proposed project. He was very knowledgeable in general construction...
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