R.J. Daum Construction Company (RJD), a leading builder of California’s commercial facilities for over 85 years, is proud to be a Woman Owned Small Business Enterprise that delivers superior General Contracting Services and Management, which is derived from our experience in hard-bid, negotiated, and Design/Build projects.

Strong, privately owned, with an experienced management staff, our employee base averages more than 15 years with the company.  Our established reputation has resulted in trade-contractor responsiveness and loyalty that improves trade-coverage and competitiveness on bid day.


RJD is experienced in such projects as Educational Institutions, Healthcare Facilities, Fire & Police Stations, Correctional Institutions, Parking Structures, Telecommunication, Gas & Electric facilities, and other Public Utility facilities.  In addition to our General Contracting services, R. J. Daum Construction Company is a leading provider of Structural and Site Concrete Services for Southern California.

RJD is a proud member of the AGC, with affiliations to the Carpenters, Cement Masons, and Laborers Unions.  This affiliation has allowed us to have a wide base of employees who are trained to handle your construction needs.  We currently carry a “B” General Building Contractors License, and a “C8” Concrete License in California.


RJD has maintained a strong presence in the telecommunications industry by providing a wide range of services to all of Southern California’s telecommunications companies.  This work included the construction of new Central Offices, Administrative Offices, Data Centers, Building Additions, Remote Mountaintop Microwave Stations, Cell Sites, Building Improvements, and Tenant Improvements. 

Being a part of their team requires our employees to work in a manner that upholds our clients’ strong commitment to Network Reliability. We have also serviced other Public Utilities with the same commitment to help them provide services throughout Southern California.  Our company is dedicated to adhere to our clients’ strict policies on Safety, Customer Satisfaction, Codes of Conduct, Work Ethics, use of Diverse Business Enterprises, and other policies that make them the leaders in their industry. 

It is our commitment to be a part of your success!


R. J. Daum Construction Company was established in 1936 by Raymond J. Daum and Wade A. Perong, and was incorporated in 1949 in the state of Nevada.  RJD has been involved in commercial construction since the company’s start. 

Throughout our history, we have developed strong relationships with our clients and sub-contractors.  We are dedicated to the success of our clients as well as the success of our sub-contractors.  It is that dedication that has produced the loyalty to sustain our success for over 85 years.


RJD has worked for various City Governments around Southern California, in Ventura, Los Angeles, Orange, Riverside, San Bernardino, Inyo, San Diego, and Imperial counties.  We seek projects that utilize our strength as a General Contractor; projects such Data Centers, Clean Rooms, heavy structural concrete/CMU projects, steel construction and subterranean work. We also have extensive experience in constructing multi-use buildings, parking structures, and institutions. 

RJD understands the importance of keeping up with the advancement of technology in the construction industry and consistently seeks to improve their bidding system to stay competitive in the industry, and advancements in automated project communications with clients and subs. This is one of the many reasons that RJD has been able to sustain their presence in the construction industry.   

RJD has had the opportunity to collaborate on various construction projects with other General Contractors in the area.  These projects ranged from multiple story parking structures, schools, detention facilities, emergency operations facilities, airports, shopping malls, commercial facilities, and hospitals. 


OUR LOCATIONS: RJD has offices in Orange and San Diego Counties, and has been serving Southern California since our inception.

You can reach out to us by phone at 714-894-4300, by email at mail.rjdaum.com or via form below.