Find Detached ADU Builders and Contractors
A detached ADU is a standalone accessory dwelling unit built separately from the main house. These backyard homes offer maximum privacy and can range from 400 to 1,200 sqft, with costs from $200,000 to $400,000.
62,610 contractors found
About Detached ADU
Detached ADUs are the highest-value type of accessory dwelling unit, offering complete separation from the primary residence. Also known as backyard cottages, granny flats, or guest houses, detached ADUs add the most resale value and generate the highest rental income. In Florida, homeowners often search for these as "guest houses," "casitas," or "in-law suites."
Typical Cost Range
$200,000 – $400,000+
Timeline
8–14 months
Detached ADU Pros and Cons
Pros
- +Maximum privacy — fully separate from main home
- +Highest rental income potential
- +Adds the most resale value to your property
- +Flexible design — studio, 1BR, or 2BR layouts
Cons
- –Highest cost ADU type ($200K–$400K+)
- –Longest construction timeline (8–14 months)
- –Requires sufficient lot space and setback clearance
- –Utility connections (sewer, water, electric) add cost
Browse Detached ADU Contractors by State
Top Cities for Detached ADU
Top Rated Detached ADU Contractors
KEYSTONE MIC INC
Sacramento, CA
Keystone Mic Inc — licensed ADU contractor in Sacramento, CA. Detached ADU construction.
JAY SONG
Los Angeles, CA
Jay Song — licensed ADU contractor in Los Angeles, CA. Detached ADU construction. 7+ years experience.
RAYGOZA CONSTRUCTION
Los Angeles, CA
Raygoza Construction — licensed ADU contractor in Los Angeles, CA. Detached ADU construction. 21+ years experience.
Joseph Corlett, LLC
Sarasota, FL
Joseph Corlett, LLC — licensed ADU contractor in Sarasota, FL.
K URBAN BUILDERS INC
Los Angeles, CA
K Urban Builders Inc — licensed ADU contractor in Los Angeles, CA. Detached ADU construction. 21+ years experience.
SHLOMI HARUSH GENERAL CONTRACTOR
Los Angeles, CA
Shlomi Harush General Contractor — licensed ADU contractor in Los Angeles, CA. Detached ADU construction.
SHULMEN INC
Los Angeles, CA
Shulmen Inc — licensed ADU contractor in Los Angeles, CA. Detached ADU construction.
RUDIMENTAL COMPANY
Los Angeles, CA
Rudimental Company — licensed ADU contractor in Los Angeles, CA. Detached ADU construction.
SPIEGEL WELLMAN CONSTRUCTION
Los Angeles, CA
Spiegel Wellman Construction — licensed ADU contractor in Los Angeles, CA. Detached ADU construction.