On average, listings lease in the $10's per square foot per year. The Roselle region is going through a decrease in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 7% decline in rent.
Compared to the rest of the Chicagoland market, the Roselle region has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 9 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. 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 1,000 sqft. Most properties in this region are approximately 2 stories. Most buildings in this region were built in 2005 and are Class B.