On average, listings lease in the $20's per square foot per year. The Bannockburn submarket is going through a a rise in rates. In the last 3 months, the median rate rose $25 per sqft per year.
Compared to the rest of the Chicagoland market, the Bannockburn region has lower rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 1 listings have been posted online, which means leases might be leasing quickly. You'll want to be prepared to make an offer immediately. About 400% of the available space in the Bannockburn are subleases, so you might be able to sign a shorter term by taking over a previous lease. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 3,180 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this market are approximately 3 floors. Most buildings in this region were built in 1998 and are Class A.