CityPaks is a minority & woman-owned ADU builder in the San Francisco Bay Area specializing in affordable, sustainable backyard cottages & detached ADUs using SIP panels. No crane needed, no sales tax, pre-approved in San Jose.
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Jeff Martinez Construction Inc. builds ADUs in Oakley, CA with 27+ years of experience. Services include detached ADUs, garage conversions, permits, finishing, and landscape integration across Contra Costa County.
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E&E General Construction Inc (License #1067263) specializes in ADU construction and garage conversions in Richmond, CA. Services include detached ADUs, attached units, and garage conversions across the Bay Area. Free estimates available.
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Cupertino ADU is Silicon Valley's premier ADU builder, specializing in accessory dwelling units for rental income, intergenerational living, home offices, and eco-friendly housing solutions tailored to Cupertino homeowners.
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Decor Builders is a San Jose-based ADU contractor with 15+ years of Bay Area experience. They offer full-service ADU design and construction, including granny flats and in-law suites, handling permits, engineering, and project management.
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Kyvos Construction offers home remodeling & ADU construction in Concord, CA. Services include kitchen & bathroom renovations, room additions, garage conversions, detached & attached ADUs, granny flats, and in-law suites.
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Atra Construction is a Bay Area ADU contractor offering full-service design and build. They handle permits, planning, and construction management. Floor plans range from 240 sq ft studios to 1,200 sq ft three-bedroom units.
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Wise Builders is a Bay Area ADU contractor with 20+ years of experience in accessory dwelling units, garage conversions, and attached or detached ADU construction across San Jose, Sunnyvale, and Silicon Valley. Free estimates available.
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At Ingenuity Construction Group, we specialize in crafting exceptional Accessory Dwelling Units (ADUs) that blend seamlessly with your existing property. With over 20 years of experience, our dedicated team ensures each ADU project is completed with meticulous attention to detail and superior craftsmanship.
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Clever Design & Remodeling builds ADUs across the San Francisco Bay Area, including garage conversions, attached, detached, and junior ADUs. Services cover permits, construction, interior design, and landscaping. Average ADU cost is ~$145,000.
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Burton Builders LLC is a trusted construction company specializing in ADU construction, single-family, multifamily, and commercial builds. Known for quality workmanship and client-focused service, they deliver expert results on every project.
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Rosegold Builders builds custom ADUs across the Bay Area and Los Angeles, handling permits, zoning, and construction. Services include garage conversions, backyard cottages, and rental units designed to boost property value.
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DevArt8 Builders specializes in ADU construction in Gilroy, offering floor plans from 350–650 sq. ft. They handle permits, ensure zoning compliance, and build detached ADUs, attached units, and garage conversions tailored to each property.
read moreUnion City, California, situated in Alameda County between Fremont, Newark, and Hayward, is a diverse and growing community that has seen increasing demand for Accessory Dwelling Units (ADUs). With its proximity to major employment hubs in Silicon Valley and the Bay Area, many Union City homeowners are turning to experienced ADU contractors to add rental income opportunities or house extended family members. The city's mix of single-family residential neighborhoods and relatively spacious lots makes it a prime location for ADU development.
Before breaking ground, homeowners must understand that ADU projects in Union City fall under both California state law and local Alameda County and City of Union City zoning ordinances. The Union City Community Development Department oversees the permitting process. Key regulations that your ADU contractor must navigate include:
Hiring a licensed ADU contractor familiar with Union City is essential for a smooth construction process. Local contractors understand the specific requirements of the Union City Building and Safety Division, including soil conditions common to the area and local utility connection protocols. They are also well-versed in coordinating with PG&E for utility hookups and navigating Alameda County's environmental review processes when applicable.
Union City homeowners typically work with ADU contractors to build one of the following unit types:
Working with a qualified ADU contractor in Union City, CA ensures your project meets all local building codes, stays on budget, and is completed efficiently. From initial design and permit submission to final inspection, the right contractor will guide you through every step. Given the high demand for rental housing in the Bay Area, investing in an ADU in Union City is a smart long-term decision for any homeowner.