On average, listings lease in the $10's per square foot per year. The Merrillville submarket is going through a an increase in rates. In the last 3 months, the median rate rose $17 per sqft per year.
Compared to the rest of the Chicagoland market, the Merrillville region has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 17 listings have been made available, which means leases are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 59% of the available leases in the Merrillville 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 1,710 sqft. Most buildings in this market are approximately 1 stories. Most buildings in this area were built in 1983 and are Class B.