Coastal Building Co
Antioch, CA
4.3(8)
Garage ConversionRemodeling
Specializing in ADU construction and related services in Antioch, CA.
Looking for the best garage conversion contractors in Antioch, California? Our directory features 1 vetted garage conversion contractors serving the Antioch area. Whether you're planning a new ADU construction, garage conversion, or backyard cottage, find the right builder for your project.
Specializing in ADU construction and related services in Antioch, CA.
Antioch is one of the top markets for accessory dwelling units in California. With growing demand for affordable housing, ADU construction in Antioch offers homeowners an excellent opportunity to add living space, generate rental income, or house family members. Our curated list of garage conversion contractors in Antioch helps you find experienced professionals who understand local building codes, zoning regulations, and permit requirements.
ADU construction costs in Antioch typically range from $150,000 to $350,000 depending on size, design, and finishes. Garage conversions are generally less expensive ($80,000–$150,000), while custom-built detached ADUs can cost more. Get free quotes from our listed garage conversion contractors to compare prices.
Yes, ADU construction in Antioch requires building permits. California has specific ADU regulations, and local zoning laws may have additional requirements. Our listed builders can help you navigate the permitting process.
ADU construction timelines in Antioch typically range from 4–12 months, depending on the project type. Prefab ADUs can be installed in 2–4 months, while custom builds may take 8–12 months including design and permitting.