Compared to the rest of the Chicagoland market, the Hillside region has greater rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 2 listings have been listed, which means leases most likley are 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 2,280 sqft. Most properties in this area are close to 2 floors. Most buildings in this market were built in 1992 and are Class A.