Compared to the rest of the Chicagoland market, the Hammond region has smaller rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 8 listings have come on the market, which means new availabilities most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 50% of the available leases in the Hammond 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 2,500 sqft. Most buildings in this market are around 2 stories. Most buildings in this market were built in 1961 and are Class B.