27823 State Route 7, Marietta, Ohio


Promanco has been a construction industry leader in Southeastern Ohio for over two decades. We have extensive experience covering a wide range of construction specialties ranging from historical renovation to new construction. Promanco frequently completes our own designs, construction, maintenance, and warranties in-house, so throughout your build process you only need to have one contact and one resource. The majority of our tradesmen are long-time employees with an average of 15+ years of experience.

That’s why when you start a project with Promanco, you know that it will be done professionally, efficiently, and right from the first step to the last.


Promanco manages construction projects from the initial design process through the final inspections. Whether you need a facility build from the ground up or whether you would like to add a new structure to an existing building, we can manage every aspect of the project. This includes, but is not limited to:

  • Walking you through the design process
  • Developing a comprehensive quote that covers every step in detail
  • Obtaining permits to ensure there are no obstacles in the project’s way

Promanco also offers Real Estate Development Services, Maintenance Services, Janitorial Services, and Renovation Services.


  • 5 Licensed Electricians
  • 1 Licensed Plumber
  • 1 Licensed HVAC Technician
  • 4 Low Pressure Boiler Operators
  • Approved AEP Solutions Provider
  • Ohio and West Virginia Licenses