Most listings are in the $20's per square foot per year. The Dyer region is seeing a a rise in rates. In the last 3 months, the median rate went up $26 per sqft per year.
Compared to the rest of the Chicagoland market, the Dyer region has smaller rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 2 listings have come on the market, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 100% of the office spaces in the Dyer are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 2,350 sqft. Most properties in this area are close to 2 floors. Most buildings in this region were built in 2000 and are Class B.