International Line Builders, founded in 1983, provides a full spectrum of electrical construction services, from transmission, distribution and substation work to inside electrical construction in numerous market sectors.

We specialize in overhead and underground distribution installation repair and maintenance, along with underground drilling to provide electric power line services. Through our division, ILB Electric, we also provide commercial electrical construction services, providing our customers with a complete package of construction services under one roof.

We have locations in Tualatin, Oregon; Newman Lake, Washington; Nampa, Idaho; and Corona, Riverside and West Sacramento, California. We are a preferred contractor in many of our markets, which means you can rely on us to get it done right the first time.


International Line Builders was created in 1983 by a lineman, Marley D. Martin. Just over a decade later, MDU Resources Group, Inc. bought International Line Builders to form its new subsidiary, MDU Construction Services Group.

Today, we are a full service electrical construction company. We’re still run by a team of linemen, electricians and industry experts. Throughout the West, we take care of our customers so they can take care of theirs.

Our parent company

CSG-Location_Map_2.11_webInternational Line Builders is part of MDU Construction Services Group, Inc. With more than 7,000 skilled employees across the country and authorization to work in 40+ states, MDU Construction Services Group provides electrical and mechanical and transmission and distribution specialty contracting services. It serves customers in the utility, manufacturing, transportation, commercial, industrial, institutional, renewable and government markets.

MDU Construction Services Group is a subsidiary of MDU Resources Group, Inc., which provides essential products and services through two lines of business: regulated energy delivery and construction materials and services.

MDU Resources got its start as a small electric utility company in 1924 and has grown into a multi-billion dollar company whose diverse holdings, growth strategy and commitment to integrity have allowed it to consistently post strong earnings and earn the reputation of providing superior shareholder value. The company is headquartered in Bismarck, North Dakota, and has been traded on the New York Stock Exchange since 1948 under the symbol MDU.


Mission statement

Our mission is to seek safety on the job, quality for our customers and integrity everywhere we go. That means we’re focused on the future, our customers and our people — setting the standard for industry excellence.