West Coast ADU
Santa Rosa, CA
5.0(0)
ADU Construction
West Coast ADU. Construction company. 4245 Hargrave Ave, Santa Rosa, CA 95407, United States
Looking for the best backyard cottage builders in Santa Rosa, California? Our directory features 17 vetted backyard cottage builders serving the Santa Rosa area. Whether you're planning a new ADU construction, garage conversion, or backyard cottage, find the right builder for your project.
West Coast ADU. Construction company. 4245 Hargrave Ave, Santa Rosa, CA 95407, United States
ABA Custom Homes Inc. Custom home builder. Closed · Opens 8 AM Mon
AE Contractor, Inc.. Architect. Open 24 hours
The Design & Building Works. Architectural designer. Closed · Opens 9 am Mon
Specializing in ADU construction and related services in Santa Rosa, CA.
ADU Design & Build by CCS Inc. General contractor. Closed · Opens 8 am Mon
Santa Rosa ADU Solutions. Home builder. 750 Stony Point Rd, Santa Rosa, CA 95407, United States
hybridCore Homes. Modular home builder. 1022 Mendocino Ave, Santa Rosa, CA 95401, United States
North Bay ADU & Additions. Construction company. 1475 North St, Santa Rosa, CA 95404, United States
Dan Boyle Construction. Construction company. Boulder Ln, Santa Rosa, CA 95405, United States
Specializing in ADU construction and related services in Santa Rosa, CA.
Round Barn - New Homes by City Ventures. Real estate developer. 208 Cupola Cir, Santa Rosa, CA 95403, United States
Christopherson Builders. Home builder. 565 W College Ave, Santa Rosa, CA 95401, United States
SDA Building. Construction company. Closed · Opens 7 AM Mon
Specializing in ADU construction and related services in Santa Rosa, CA.
Specializing in ADU construction and related services in Santa Rosa, CA.
Urban Equity Builders. Construction company. 4291 Santa Rosa Ave, Santa Rosa, CA 95407
Santa Rosa is one of the top markets for accessory dwelling units in California. With growing demand for affordable housing, ADU construction in Santa Rosa offers homeowners an excellent opportunity to add living space, generate rental income, or house family members. Our curated list of backyard cottage builders in Santa Rosa helps you find experienced professionals who understand local building codes, zoning regulations, and permit requirements.
ADU construction costs in Santa Rosa 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 backyard cottage builders to compare prices.
Yes, ADU construction in Santa Rosa 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 Santa Rosa 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.