On average, listings lease in the $10's per square foot per year. The Valparaiso region is going through a decrease in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 7% decline in rent.
Compared to the rest of the Chicagoland market, the Valparaiso region has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 22 listings have come on the market, which means leases most likley are 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 1,500 sqft. Most buildings in this area are close to 1 stories. Most buildings in this region were built in 1979 and are Class B.