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(714) 434-4887

Design-Build and General Contractor Services for Southern California's Large-Scale Projects

Slater Builders is a full-service contracting firm for commercial / institutional builds. Based in Costa Mesa, we specialize in constructing large-scale projects throughout Los Angeles, Orange, San Bernardino, and San Diego Counties. If you’re in need of a general contractor or more extensive design-build services, Slater Builders’ highly organized and efficient team is available.

We specialize in all phases of construction—from design and preconstruction through project completion. We begin each project mindful of its end and create key projections and cost estimates to honor project budgets and deadlines. In the initial phases of each project, we work with you to make necessary delivery or design adjustments that ensure you will be pleased with the completed project. Our skilled team adheres to a thorough scheduling system and guarantees a seamless delivery every time.

D.W. McNeil Shovel

Women Business Enterprise Contracting Firm

Slater Builders is proud to be a Woman Business Enterprise, certified by the National Woman Business Owners Corporation (NWBOC). As a woman-owned and -operated firm in a male-dominated industry, we offer a fresh alternative to the standard.

We understand that each project requires a unique approach. From extensive design-builds to minor tenant improvements, we prioritize creativity and inclusivity in every project. Because honesty, integrity, reliability, and teamwork are at the core of our mission, you can expect innovative approaches, precision planning, and prompt, on-budget delivery that

Quality-Minded Contractor with Over 135 Years of Experience

Our family has been building in Southern California for more than 135 years, passing our craft and passion for construction down the generations. Over the decades, we have completed projects in more than 9 industries — including office/industrial, hospitality, living environments, and healthcare. No matter the scale or scope of the project, our commitment to quality and craft is consistent. We strive to create lasting client relationships that persist beyond a project’s close. Support from you—our loyal client base—enables our work and makes it worthwhile, decade after decade. Contact us today to get started.

Testimonials What Our Clients Say


Brother Hilarian O’Conner, Archdiocese of Los Angeles

Slater Builders continuing relationship with the Archdiocese is testament to their professional workmanship, cost competitiveness, delivery on a schedule, response to problems and cost savings suggestions… I highly recommend Slater Builders as your builder.

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Jacqueline Powers Doud, Mount St Mary’s College

Jacqueline Powers Doud, Mount St Mary’s College

I am pleased to write this letter in support of Slater Builders Construction Company. Bill Dunlap was the principal on the work completed for Mount St. Mary's College. Slater Builders played a major role in the execution of our capital projects during the Invest in the Mount Campaign that began in January of 2005 and concluded in June of 2008.

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Jeff Lochner, Vestar Development Company

Jeff Lochner, Vestar Development Company

Vestar was fortunate to work with the caliber of construction professionals on the Slater team. We welcome the opportunity to work together in the near future.

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Mother Regina Marie, Carmelite Sisters of the Most Sacred Heart

Mother Regina Marie, Carmelite Sisters of the Most Sacred Heart

With this letter comes my prayerful gratitude to you for the much-needed services of Slater Builders. It has been truly animating to work alongside individuals of integrity and possessing high professional standards.

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Ralph Kosmides, Ruby’s Diner

Ralph Kosmides, Ruby’s Diner

We have found Slater Builders to be very professional, knowledgable and always willing to put in that extra mile to get the job done. If the opportunity arises in the future, we would work with Slater Builders again.

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Rebekah Gladson, University of California, Irvine

Rebekah Gladson, University of California, Irvine

The entire design and construction team at UC Irvine enjoyed working with your team in creating this unique entry plaza for our campus.  We look forward to continuing our relationship with Slater Builders, specifically with the project you were awarded for the Mesa Court Renovation.

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Ramona Convent Secondary School

Sister Kathleen Callaway, Ramona Convent Secondary School

I highly recommend Slater Builders to you. Our board of trustees was very pleased with their work and anticipates working with them on the next phase of our Master Plan, as soon as the funds are raised.

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UC Irvine

Toby Weiner, University of California, Irvine

Working with Slater Builders was a pleasure.  The team assigned to our project was extremely professional throughout our theatre landscape enhancement project.  They assured us that our expectations would be met and in fact, they were exceeded.  I enjoyed working with their entire team and would highly recommend them to any company.

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Catholic Education Foundation

Kathleen H. Anderson, Catholic Education Foundation

By lending your support—and supplies—you have enabled us to cultivate awareness of the CEF through this Kickoff Event. I greatly appreciate your support of our mission and thank you for helping our team make a positive difference in the lives of thousands of deserving children throughout the Archdiocese of Los Angeles.

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Cingular Wireless

David Carp, Cingular Wireless

West Coast Wireless has been very fortunate to have Slater Builders as our partner in Southern California. It is particularly important to us, as we are located in Dallas and had to rely on your team to meet dealines and budgets.

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Corporate Property Investors

Michael J. Schreiber, Corporate Propery Investors

Not only is Slater Builders a quality group of contractors who knew how to build a project in a timely and cost efficient manner, but they are also true honest business men. Believe it or not, in a day of low bidding, extras and liening, there is still a contractor who genuinely cares about the outcome of the project.

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Daniel Freeman Marina Hospital

Mary Ellen Brown, Daniel Freeman Marina Hospital

Thank you for generously donating 10 portapotties again this year for the 10th Annual Marina Breakers 10K/5K Run and 3K Walk, benefitting community outreach programs at Daniel Freeman Hospitals. The event was a great success and could not have been without the support of the community businesses such as yours.

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Diocese of Orange

Joe Novoa, Diocese of Orange

My confidence in Slater Builders is based on the honesty, integrity and the. outstanding service that is a constant theme within the company. The Diocese of Orange looks forward to continuing this productive business relationship with Slater Builders Inc.

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Grill Concepts, Inc.

John Sola, Grill Concepts, Inc.

I wanted to write a letter to thank you and your team for all of the hard work that went into making The Ritz a showcase restaurant for us.

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HEC Consulting

H.E. Conway, HEC Consulting

I would like to take this opportunity to thank you for your assistance in reconstruction and development of our offices at our present location here on Crowther Ave. Your professionalism and attention to detail was a very pleasant experience and greatly appreciated.

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Hunsaker & Associates

Richard Hunsaker, Hunsaker & Associates

We have enjoyed a relationship with Slater Builders for the past five years. They have provided tenant improvements for our tenants and Hunsaker & Associates Irvine, Inc.

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J. Pete Anderson, J.P. ANDERSON

What appeared to me to be an easy job continued to be complicated by requests from the tenant and demands from the building department. I want to compliment you on the professional way you solved the problems as they came up while continuing the progress of the job.

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Karla Worsdell, KNI Properties, LLC

One of my properties was built in the early 1970‘s. IT looked dated, tired, rundown and almost ugly.

SLATER BUILDERS came to the rescue.
What a transformation!

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Menlo College

G. Timothy Haight, Menlo College

As president of Slater Builders, I anticipated that Bill’s personal character would reflect his corporate reputation. Indeed, I found in our initial meeting that he exceeded my expectations: Bill is an exceptional individual of quality and character—uncommonly dedicated to his family, his profession and his work ethic.


Michael J. Ryan, Michaelson, Connor & Boud, Inc.

The Slater Builders team of professional and skilled employees helped to make our business relationship a most enjoyable one. Any questions or concerns we had during the construction period were always answered in a timely and professional manner. I would highly recommend Slater Builders to help with your construction needs.

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Why us? What Makes Us Special

Full-service general contracting firm

Honesty, integrity, and reliability of staff

Family-owned in Orange County for 25+ years

Our people

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