On average, listings lease in the $10's per square foot per year. The Carol Stream region is seeing a a rise in rates. In the last 3 months, the median rate increased $20 per sqft per year.
Compared to the rest of the Chicagoland market, the Carol Stream region has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 9 listings have been made available, which means office spaces might be going fast. You'll want to be prepared to make an offer immediately. About 22% of the available leases in the Carol Stream are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 4,470 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this market are close to 1 floors. Most buildings in this area were built in 1987 and are Class B.