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Tonn and Blank Construction

Jon Gilmore - President/CEO
Mary Peters - Vice President of Finance
Joe Coar - Vice President
Scott Wells - Vice President of Central Indiana Region
Larry Ballah - Vice President of Design Service

Date Established
Established in 1922

About Us
In 1922, Tonn and Blank Construction Company, was founded in Michigan City, Indiana, as a partnership between C.W. Tonn and J.G. Blank. By 1936, Tonn and Blank was providing construction services for area clients began traveling throughout the country building for clients in Texas, California, Pennsylvania, New York., and eventually building in 49 states.

Today, with two offices and more than 300 employees, we continue the tradition of innovative construction practices and implementing of new technologies such as "green" construction (LEED), integrated project delivery (IPD), and Building Information Modeling (BIM).

Thanks to a portfolio of work with clients who ask us to join them in the earliest stages of a construction project, we have earned unique insights into the financial and operational needs of our client's construction investment. Starting at the point of strategic planning, space programming, and feasibility studies, Tonn and Blank Construction becomes integral in helping clients achieve their business plan.


Tonn and Blank Construction
1623 Greenwood Avenue
Michigan City, IN, 46360

Phone: 219-879-7321
Fax: 219-873-0210

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