Since its inception in 1983, Youngman & Company has had a broad base of clients ranging from multinational corporations to the single family homeowner. Among its clients are several Fortune 500 companies including SC Johnson, McDonald's Corporation and Ford Motor Company. Many of the major healthcare institutions in Metro Chicago are also included (see listing). While the majority of its clients are based in the Midwest (Illinois, Iowa, Wisconsin and Michigan), YCI has also completed projects for clients in Arizona, California, Tennessee and as far away as the Philippines.
Many of its clients are long term for which YCI has performed repeat services. In some instances, other architects and design firms have sought out the special expertise of YCI to assist them in their own projects.