Mark III Construction is an MEP subcontractor self-performing mechanical, electrical, plumbing, and underground utilities for the commercial and industrial industries. Headquartered in Sacramento with an additional office in Fresno, Mark III delivers projects across Northern and Central California.
Mechanical Learn More
Electrical Learn More
Plumbing Learn More
Underground Utilities
Underground Utilities Learn More
Virtual Construction & Fabrication
Virtual Construction & Fabrication Learn More
Panelized MEP Wall Systems
Panelized MEP Wall Systems Learn More


  • Fully integrated MEP & utility trades
  • Identifies & eliminates scope gaps
  • Offers customers a single point of contact
  • Eliminates multiple profit layers & reduces overhead cost
  • Increases field efficiencies


Project Mountain is transforming the way medical organizations approach design and construction. As the innovation epicenter of Mark III, Project Mountain has developed breakthrough ways to plan, design, and build the medical office building. This concept breaks down silos, eliminates waste, and beats tight schedules and budgets by utilizing our unique “3Box” process. By rethinking how complex projects are conceived, planned, and executed, Project Mountain is leading the evolution of construction.

Learn More

Contact Us

Corporate Office

5101 Florin Perkins Road
Sacramento, CA 95826
Phone: 916-381-8080 Fax: 916-386-0363

Fresno Office

5252 E. Home Avenue
Fresno, CA 93727
Phone: 559-353-2744 Fax: 559-840-1460