Most listings are in the $10's per square foot per year. The Bensenville submarket is going through a a boost in rates. In the last 3 months, the median rate increased $17 per sqft per year.
Compared to the rest of the Chicagoland market, the Bensenville submarket has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 10 listings have come on the market, which means spaces 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,590 sqft. Most buildings in this market are close to 1 stories. Most buildings in this market were built in 1979 and are Class A.