ADU Contractors near Union City, CA
Reno Revive Remodeling
2655 Stanwell Drive, Concord, CA 94520
26.4 miles
Whether you’re planning a rental unit, a guest house, or a private suite for family, RenoRevive will help you design and build a fully functional ADU that fits your needs, your lot, and your long-term goals.
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Element Homes
188 Acalanes Drive, Sunnyvale, CA 94086
15.4 miles
Element Homes is a California ADU contractor offering full-service design, permitting, and construction. They build detached ADUs, garage conversions, and in-law suites across the Bay Area, with in-house teams, warranties, and free estimates.
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ResCom ADU, LLC
675 Ygnacio Valley Rd B213, Walnut Creek, CA CA 94596
21.1 miles
ResCom ADU is a full-service ADU builder in Walnut Creek, CA, offering design, permits, engineering, construction & hookups. With 100+ years of combined experience, they deliver custom, cost-effective accessory dwelling units using SIPs & Net-Zero technology.
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Bao-Tran Builders Inc
2156 The Alameda, San Jose, CA 95126
18.5 miles
Bao-Tran Builders Inc specializes in ADU construction, including detached ADUs, granny flats, JADUs, garage conversions & multi-unit properties. Expert ADU contractor delivering functional, high-quality housing solutions for property owners.
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Spruce ADU Builders Union City
3909 Smith Street, Union City, CA 94587
3.4 miles
Spruce ADU Builders is a licensed ADU contractor in Union City offering expert accessory dwelling unit construction. Services include granny flats, in-law suites, and custom ADUs with free consultations, transparent pricing, and a 100% satisfaction guarantee.
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PCI Construction Inc
2682 Middlefield Road, Redwood City, CA 94063
13.8 miles
PCI Construction Inc is a trusted ADU contractor offering custom accessory dwelling units, garage conversions, granny flats, and in-law suites. Licensed, bonded, and insured, they handle permitting, design, and construction efficiently.
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Parsa Construction
1105 Fair Weather Circle, Concord, CA 94518
23.8 miles
Parsa Construction offers residential & commercial remodeling, ADU construction, and retrofit services. Specializing in kitchen, bathroom, room additions, and accessory dwelling units like granny flats and detached ADUs, they manage permits, design, and build.
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Bay Builders & Remodeling
800 Charcot Avenue, San Jose, CA 95131
16.2 miles
Bay Builders & Remodeling specializes in custom ADU construction across Santa Clara, San Mateo, and East Bay. Services include attached, detached, garage conversions, and JADUs, helping homeowners add rental income, family housing, or workspace.
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Valley Home Builders inc.
3466 Edward Avenue, Santa Clara, CA 95054
17.9 miles
Valley Home Builders Inc. is a Silicon Valley design-build contractor serving Santa Clara & San Mateo Counties. Founded in 2005, they specialize in kitchen remodeling, ADU construction, and home renovations across San Jose, San Mateo & beyond.
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prefabADU
1111 Western St, Fairfield, CA CA 94533
46.3 miles
prefabADU is a Bay Area ADU builder with 16+ years of experience offering affordable kits and plans from under $45K. With 12 state-approved plans valid across California, they simplify permits, design, and installation for homeowners.
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Apex ADU Builders
10050 North Foothill Boulevard, Los Angeles, CA 95014
19.6 miles
Apex ADU Builders is a Los Angeles-based contractor specializing in accessory dwelling unit construction. Services include new builds, garage conversions, permitting, and design. Costs range from $80K–$400K, with potential ROI 35% higher than homes without ADUs.
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GADI Construction
3205 Cabrillo Avenue, Santa Clara, CA 95051
17.9 miles
GADI Construction, led by Nadav, specializes in ADU construction, home expansions, garage conversions & granny flats. Known for detailed planning, clear communication & professional client guidance throughout every project phase.
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Shed Shop
3201 Diablo Avenue, Hayward, CA 94545
5.5 miles
Shed Shop offers ADUs (Accessory Dwelling Units) via their Mini Cottage program. Sizes range from 192 to 480 sq. ft. Services include foundation, plumbing, electrical, permits & more. Available in select cities.
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Custom Home
2092 Concourse Drive, San Jose, CA 95131
15.9 miles
Custom Home is a Bay Area ADU contractor (CSLB #986048) with 160+ projects since 2005. They build detached, attached, junior ADUs & garage conversions across South Bay & Peninsula, with costs from $120K–$500K+.
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S.D White Construction Inc
1151 Hensley Street, Richmond, CA 94801
30.4 miles
S.D White Construction Inc, a licensed Bay Area ADU contractor with 20+ years experience, builds detached, attached, garage conversion & above-garage ADUs in Richmond, CA. Full-service from design & permits to final inspection, completed in 3–5 months.
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Other cities in California
What you need to know
ADU Contractors in Union City, CA: Building in the Heart of the Tri-City Area
Union 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.
Understanding Union City ADU Regulations and Permitting
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:
- Setback requirements: Detached ADUs typically require a minimum 4-foot rear and side yard setback.
- Maximum ADU size: Detached ADUs can be up to 1,200 square feet, while attached ADUs are generally limited to 50% of the primary dwelling's square footage.
- Height limits: Detached ADUs are generally limited to 16 feet in height, though this can vary based on proximity to the main structure.
- Owner-occupancy rules: California state law has suspended owner-occupancy requirements for ADUs until 2025, offering more flexibility for Union City property owners.
- Parking requirements: ADUs located within half a mile of public transit may be exempt from additional parking requirements — a significant advantage given Union City's access to BART.
Why Hire a Local ADU Contractor in Union City?
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.
Types of ADUs Popular in Union City
Union City homeowners typically work with ADU contractors to build one of the following unit types:
- Detached ADUs: Standalone structures in the backyard, ideal for larger lots common in Union City's residential neighborhoods.
- Attached ADUs: Extensions of the existing home, sharing at least one wall with the primary structure.
- Junior ADUs (JADUs): Units up to 500 square feet created within the existing home's footprint, often from a converted bedroom or garage space.
- Garage Conversions: A cost-effective option for Union City homeowners looking to maximize existing structures.
Get Started with a Trusted Union City ADU Contractor
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.