Corporate guaranteed NN investment. The dental office is located in a retail setting in a desirable Chicago suburb with strong demographics, including: heavy population density, affluent income levels, high traffic counts, and strong visibility with parking. The dental office is located in a retail setting in a desirable Chicago suburb with strong demographics, including: heavy population density, affluent income levels, high traffic counts, and strong visibility with parking. Downers Grove is a village in DuPage County, Illinois, United States. It is a south-western suburb of Chicago in the I-55 Corridor.