On average, listings lease in the $20's per square foot per year. The Oakbrook Terrace submarket is going through a a boost in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 3% rise in rent.
Compared to the rest of the Chicagoland market, the Oakbrook Terrace submarket has more expensive rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 10 listings have been made available, which means new availabilities are probably leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 4,410 sqft, there are still 0 leases below 2,000 sqft. Most properties in this region are close to 5 stories. Most buildings in this region were built in 1985 and are Class A.