Compared to the rest of the Chicagoland market, the Westmont submarket has lower rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 23 listings have been made available, which means spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 4% of the listings in the Westmont are subleases, so you will probably have to consider a longer term lease. 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 1,790 sqft. Most properties in this area are approximately 1 floors. Most buildings in this area were built in 1986 and are Class A.