Compared to the rest of the Chicagoland market, the Chesterton submarket has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 4 listings have been listed, which means spaces are probably leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,200 sqft. Most buildings in this area are around 3 floors. Most buildings in this region were built in 1965 and are Class C.