Most listings are in the $10's per square foot per year. The Westmont submarket is experiencing a decrease in rates. In the last 3 months, the median rate decreased $3 per sqft per year. That's a 16% decline in rent.
Compared to the rest of the Chicagoland market, the Westmont region has less expensive rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 23 listings have been listed, which means office spaces most likley are leasing quickly. 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 1,780 sqft. Most properties in this market are approximately 1 stories. Most buildings in this area were built in 1988 and are Class A.