While Union City’s economy mostly centers around industrial and shipping establishments in the area, companies from a variety of sectors are now looking to set up in the city. Businesses owners are free to choose between building their spaces from the ground up or renovating existing structures to fit their needs. Whatever the case may be, partnering with the right contractor will make the process easier.

Our editorial team has compiled a list of the best commercial contractors in the area. Each firm has successfully completed numerous projects building from the ground up. These firms have received positive feedback from their previous clients, many of which continue to come back to partner with the firm for more projects.

Nelson T. Lewis Construction Co., Inc.

25001 O’Neil Avenue, Hayward, CA 94544

Nelson T. Lewis Construction Company has been family-owned and operated since 1929. Its 92 years in business have earned the firm the reputation of being one of the oldest general contracting firms still active in the San Francisco Bay area. The firm’s services include design-build, concrete tilt-up, masonry, wood-frame, tenant improvements, and seismic upgrades. Approximately 80% of the firm’s projects come from repeat clients.

Several of the firm’s projects have received positive feedback from public reviews for the design. The Sequoias—a senior living provider in Portola Valley—is highly rated for its facilities and for features like the swimming pool, the gym, the arts and crafts room, the central office, and the lounge and dining areas. Another well-reviewed project provided by the firm is the Garre Winery in Livermore. The winery is an events center equipped with a tasting room, a reception hall, and an outdoor courtyard that overlooks the vineyard. A restaurant, deli, and gift shop are also available.

Flory Construction Inc.

2325 Verna Court, San Leandro, CA 94577

Serving Union City and the surrounding areas for 56 years, Flory Construction’s experience has repeatedly earned the trust of its clients. The firm puts a great deal of emphasis on creating partnerships with its clients. That spirit of collaboration has led to the completion of projects like the VSCO offices in Oakland and New York City, as well as the Lokanta Restaurant in Walnut Creek, CA. Its Sideboard project in Lafayette, CA comes from working with a repeat client where the firm headed the design-build team. In addition to building out the restaurant, the firm also created a basement and performed structural work.

The firm’s services include preconstruction, design-build, and value engineering. Flory Construction partners with its clients for remodeling, tenant improvement, ground-up, office, church, restaurant, and industrial projects. Client and partner testimonials repeatedly speak to the firm’s integrity and expertise on each project.

TEAMWRKX Construction, Inc.

1855 Park Avenue, San Jose, CA 95126

TEAMWRKX Construction follows three general approaches for its projects: design/build, design/bid/build, and construction management at risk. Clients have the option to contract the firm for design and construction services, hire the project architect to produce drawings and specifications for bidding, or contract the construction manager to act as a consultant in the preconstruction phase and then as a general contractor during the construction phase. The firm’s approach can be further tailored to a project’s specific needs.

TEAMWRKX Construction’s three general approaches have allowed it to complete over 5,000 projects during its 17 years of business. These projects have ranged in size and complexity, from renovations to system installations to tenant improvements to large-scale construction. The TRM Cornering in Union City underwent tenant improvement on its offices and warehouse. Installations for 300 CDA drops and 1,200 electrical drops were included for the warehouse, while the lobby and stairwell received seismic upgrades. Labs were converted to an exercise room, an office, a break room, and showers. The existing path to the exterior site was given an accessibility upgrade.

Build Group, Inc.

1210 Coleman Avenue, Santa Clara, CA 95050

The H&M Union Square flagship store in San Francisco was built in 2010 by Build Group. The store is set up in a historic building on Powell Street and includes escalators, large video display screens, stone flooring, 42 dressing rooms, and 400 linear feet of sidewalk. Historical features like the ceiling were carefully restored by the firm rather than demolished. The entire project was finished a month ahead of schedule.

Successfully completing the project earlier than expected is a result of the firm’s ability to provide in-house capabilities. Build Group has the expertise to self-perform structural concrete, metal framing, drywall, insulation installation, and plastering. It is also well-versed with project delivery methods like negotiated GMP, CM at risk, IPD, lean, design-build, and P3. As a result of varying its services and expertise over its 14 years of business, 80% of its work comes from repeat clients.


777 N 1st Street, 5th Floor, San Jose, CA 95112

SWENSON has partnered with numerous clients over the 109 years it has been in business. Clients like Walgreens, TMH Hotels, and San Jose State University have partnered with the firm for their commercial projects. The Huntington Hotel Group contracted SWENSON to act as the design-build general contractor for the ground-up extended-stay hotel project in San Jose, CA. The project included two separate branded hotels: one hotel had 175 rooms and the other featured 146 rooms. The end result was the Marriott Residence Inn & SpringHill Suites, designed to be two different hotels in one structure. Aside from the hotel, a three-story stand-alone parking area with 235 parking spaces was also provided.

SWENSON’s designs are based on a design-develop-build approach that focuses on innovation and sustainable practices. The firm uses its exclusive Landmaker structural system to create reliable and affordable solutions to fit the seismic requirements of modern mid- and high-rise structures. The system is based on extensive research and development, which ensures uncomplicated design elements and functionality.


  • Jake Gustafson

    Jake has served as Senior Editor at General Contractors and brings a wealth of experience rooted in his passion for building. Holding a degree in Construction Engineering Management from Oregon State University, he actively engaged in industry-related activities, including membership in the Associated General Contractors of America student chapter and participation in the Associated Schools in Construction student competition. Previously, Jake served as a project engineer for a prominent general contractor in Portland, where he played a pivotal role in various aspects of construction projects, from pre-construction to subcontractor management. His expertise extends to working on innovative projects, such as North America's largest CLT commercial building. Expertise: Commercial Construction, Commercial Remodeling, Home Design and Build Key Highlights: Editor at General Contractors, Project Engineer for Portland-based general contractor, Field Engineer for the largest CLT commercial building in North America Education: Oregon State University, Degree in Construction Engineering Management