Compared to the rest of the Chicagoland market, the Carol Stream submarket has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 16 listings have been made available, which means listings are probably going fast. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 810 sqft. Most properties in this market are around 1 stories. Most buildings in this area were built in 1987 and are Class B.