about us

Nearly a century of construction expertise.

Tonn and Blank is a leading building construction company headquartered in Michigan City, Indiana, and serving the entire Midwest region. We offer decades of expertise in managing all aspects of construction services, from pre-planning to complete, design-build project delivery.

Our diverse team specializes in:

  • Healthcare Construction
  • Industrial Construction
  • Commercial Construction
  • Higher Education Construction
  • Government Construction
  • Bridge Construction


Deliver innovative construction solutions that build trust, earn respect, and create value.


    We believe there is no substitution for a strong work ethic and professionalism. Working together, with collective energy, we focus on delivering a positive experience for our customer throughout the building process.

    We center our work environment around family, shared values and goals. Understanding family comes first, we care for and help each other because we believe in and trust one another. We build up the communities in which we build by supporting and assisting those organizations which are working to better our society.

    We value the contributions of each of our employees, and treat other with respect and dignity. We conduct ourselves with uncompromising integrity, making sure our actions match our words.

    We charge each employee with a personal and professional commitment to make sure each employee, subcontractor, site visitor, etc. returns home safely every day. We ensure all employees have the tools and training needed to eliminate jobsite injuries.

    We execute each project by thinking and acting with the customer in mind. We take pride in being reliable and responsible for bringing our customer's ideas into reality.

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