Koch & Koch, Inc.


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About Us

Koch & Koch, Inc. is a WMBE General Engineering and Electrical Construction company based in Grass Valley, California. We were founded in 1991, under the name Koch Construction. Originally focused in residential construction, our passion has continued to grow, leading us to commercial and public works projects spanning throughout California. From small jobs to multimillion dollar projects, we establish relationships with our clients and provide a one stop shop experience.

We work primarily as a General Contractor on State and Federally funded public works projects, including water and sewer pipeline systems and pumping stations. Our individual services include site work, underground, excavation, directional drilling, structural concrete, electrical, plumbing and metal buildings.

Koch & Koch, Inc. continues to operate as a family owned and operated company.


  • Small Business Enterprise
  • Women & Minority Business Enterprise
  • DIR Public Works Contractor