Irvine is one of the happiest cities in the United States of America, situated in the center of Orange County in Southern California. It is the United States fastest-growing metropolis and is known for its high living standards. This is only one of many reasons why many residents and businesses enjoy being in this city.

If you own an office in the Irvine area and want to enhance the look of your space, our editorial team has created a list of some of the top tenant improvement contractors in Irvine, California. Each firm was chosen for its portfolio, awards, press features, and industry affiliations.

McShane Construction Company

2030 Main St. Suite #450, Irvine, CA 92614

Three decades ago, McShane Construction Company was launched as a premier national industrial, commercial, and multi-family construction firm. It develops multi-family and affordable housing complexes, industrial facilities, public and private health care facilities, fitness centers, and office buildings. The company aims to improve supply chain management, increase operational efficiencies, and build settings that stimulate innovation.

McShane creates spaces that help clients reach their goals. Its projects deliver more than simply buildings. The company’s commitment to sustainable building, overseen by Jim McShane, Molly McShane, and Mat Dougherty, helps enrich the places it constructs.

The firm is a recipient of various accolades, such as the 2021 NAIOP Minnesota Award of Excellence in the Industrial Build-to-Suit category, the 2021 Landmarks Illinois Richard H. Driehaus Foundation Preservation Award in the Adaptive Reuse category, and the 2021 Industrial/Manufacturing/Science Project of the Year Award, and the People’s Choice Award Minnesota Real Estate Journal Awards.

DPR Construction

4665 MacArthur Court, Suite #100, Newport Beach, CA 92660

DPR exists to Build Great Things. Operating in Sacramento since 1990, DPR is a self-performing contractor focused on highly complex and technical projects. The firm’s core markets include advanced technology, commercial, healthcare, higher education, and life sciences. From small tenant improvements to large-scale multi-million-dollar complexes; DPR focuses on fulfilling customer needs and providing highest possible value.

Nils Blomquist is in charge of the firm’s Sacramento Business Unit. Under his leadership, the firm develops strategic solutions considering sustainable aspects, virtual designs, and production. The firm has received several honors from the United States Green Building Council (USGBC) and was awarded the Engineering News-Record 2021 Award of Merit Southwest Best Projects, the Best Higher Education/Research Project, the Best Health Care Project, and several Sustainability Awards of Merit.

W.E. O’Neil Construction

909 N. Pacific Coast Hwy. Suite #400, El Segundo, CA 90245

W.E. O’Neil Construction began operations in 1925 and has since grown to become an award-winning and nationally recognized industry leader. Its foundation is built on its people and commitment to quality, honesty, and sensitivity to its client’s demands. The firm’s expertise covers almost every commercial market area and project delivery approach, including design-build, design-assist, construction management at risk, and lump sum bid.

Brian Ramsay is the current CEO of the company. He has broad management experience in the construction business, having worked as a project engineer, project manager, estimator, and project executive. Mr. Ramsay oversaw the successful construction of a new branch office in Denver, Colorado, in 1999 and was subsequently named President of the California office in 2003 before becoming CEO in 2014.

The O’Neil brand has become synonymous with excellent professional building services with four generations of family leadership and nearly 100 years of expertise. Its works have been featured by several publications in 2021 alone, including Business Wire, Long Beach Business Journal, The Porterville Recorder, and The Business Journal.

Millie and Severson

3601 Serpentine Dr. Los Alamitos, CA 90720

Since its incorporation in 1947, Millie and Severson has become a full-service general contractor and built all project types around Southern California. The firm’s current president, Charles Severson’s son, Jonathan, joined the firm after Millie’s death in 1975. Today, the company provides construction and preconstruction services for various project types, including office, health care, medical office building, industrial, cultural, and educational.

Jon joined the company in 1975 after graduating from the United States Military Academy at West Point and has served the company in nearly every capacity over the last four decades. As president, Jon’s leadership has been critical to the company’s sustained excellence. He helped launch Millie and Severson on its successful trajectory, where his leadership, passion for building, construction expertise, and commitment to client satisfaction continue to guide the team into its next chapter of excellence. Millie and Severson is a member of the National Association for Industrial and Office Parks in Southern California, the U.S. Green Building Council, and the Green NRG Institute.


2569 McCabe Way, Suite #100, Irvine, CA 92614

Bernards is a globally rated, interdisciplinary commercial builder headquartered in Los Angeles with four regional offices around California. The now employee-owned company, founded in 1974 by brothers Doug, Greg, and Jeff, delivers projects to school districts, colleges, universities, developers, corporations, health care organizations, entertainment venues, and government agencies under various general contracting, construction, and program management contracts. The company’s extensive list of repeat customers, which includes USC, Caruso Affiliated, Rose Bowl Operating Co., Six Flags Magic Mountain, and a distinguished business portfolio, attests to its clients’ satisfaction for 40 years.

Rated among the top commercial builders to work for by the Los Angeles Business Journal by making it to the 2016 Best Places to Work list, Bernards’ diverse team leverages the background and talents of operations, virtual design, construction, sustainability, estimating, and administrative professionals. The firm is a member of The Design-Build Institute of America, the American Public Works Association, and the American Society of Civil Engineers.

DEB Construction

2230 E. Winston Rd. Anaheim, CA 92806

DEB Construction is a medium-sized commercial general contractor specializing in financial institutions, health care, corporate, and critical infrastructure construction. Yakub “Jake” Vali, a structural engineer, and his two partners, a designer and a builder, founded the business in Anaheim, California, in 1975. Together, these three partners built the company’s DNA and name: Designer, Engineer, and Builder.

DEB Construction began by working on small residential and commercial projects. Jake Vali, the company’s driving force from its inception, bought out his two partners and assumed sole possession of DEB Construction in 1978. Later that year, the studio established a branch in San Jose, California. After Jake Vali retired in 1994, his son, Adam Vali, took over as DEB Construction’s president after graduating from Stanford University and continues to be the company’s CEO.

DEB is a proud member of the U.S. Green Building Council, with LEED-accredited professionals in the team and LEED Platinum, Gold, and Silver ratings.

Casco Contractors

9850 Irvine Center Dr. Irvine, CA 92618

Casco Contractors is an Orange County-based general contracting firm. It specializes in commercial tenant upgrades for its Southern California clients. The firm collaborates with various companies from every industry to design exceptional settings. It also walks customers through the challenging construction landscape, gaining their trust and confidence as it creates personalized, cutting-edge structures and places.

Casco has grown into one of Southern California’s most known commercial tenant improvement firms over the last two decades. It has a Zero Punch initiative, led by Cheryl Osborn, that tries to reward its staff for executing seamless projects. An unrivaled commitment to quality and customer satisfaction aid in bringing clients’ goals to reality on schedule and within budget.

Esplanade Builders

23820 Hawthorne Blvd. Suite #100, Torrance, CA 90505

Esplanade Builders, Inc. is a certified small business and has provided general construction services in Southern California since 2003. A full-service general contractor, the studio offers project support in every commercial real estate market sector from pre-construction through occupancy. Esplanade Builders does most of its daily operations under a general building contractor B-license, but it continuously supports clients through ongoing service work. 

Esplanade Builders provides turn-key small projects at a highly competitive price point. Serving Los Angeles, Orange, and Riverside counties from San Clemente to Valencia, the firm specializes in tenant improvement construction and is a six-time best-in-class award recipient. Because the firm is flexible and accommodating, it has built strong relationships, resulting in a diverse client base and steady growth.

Some of Esplanade Builders’ works have appeared in publications like Orange County Business Journal and Los Angeles Business Journal.

Uprite Construction

2211 Michelson, Suite #500, Irvine, CA 92612

Uprite Construction Corporation is an award-winning multi-service construction company. The firm has been in the industry for 30 years and is managed by company president Chris Dell Aringa.

Uprite Construction Corporation performs design-build, new construction, construction management, tenant improvement, heavy civil, heavy structural teardowns, and soft demo interior work. Because of its exemplary performance, the company has over 1,160 awarded projects since 1991. Uprite has a long list of  satisfied high-profile clients, including Amazon, Caruso, CBRE, Newmark Knight Frank, and Greenlaw.

Uprite ensures customer satisfaction by prioritizing cost-effective, efficient, and high-quality work. As a result, clients seek to employ the firm again and again.

Angeles Contractor

783 Phillips Dr. City of Industry, CA 91748

Founded in 1998 and incorporated in 2005, Angeles Contractor is one of the nation’s fastest-growing and respected general contractors, providing smart, cost-effective building solutions for both public and private sector clients. Its services include design-build, construction management, general contracting, master planning, architecture, engineering, cost estimating, value engineering, condition assessment, and quality control.

For 46 years, senior vice president Walter Shirley has overseen an array of projects in the construction industry, including country building hotels, hospitality venues, restaurants, schools, and office buildings. His passion for construction is evident, and his desire to make his clients happy has made him an effective builder. Under Walter’s watch, Angeles Contractor has been recognized by the Western Painting and Coatings Contractors Association and is Lead Safe Certified by the Environmental Protection Agency.


  • 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