Most listings are in the $10's per square foot per year. The Lombard submarket is seeing a an increase in rates. In the last 3 months, the median rate rose $19 per sqft per year.
Compared to the rest of the Chicagoland market, the Lombard region has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 86 listings have been made available, so you'll want to check back regularly for new listings. About 40% of the available space in the Lombard 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 on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,300 sqft. Most properties in this region are around 1 stories. Most buildings in this area were built in 1983 and are Class B.