On average, listings lease in the $10's per square foot per year. The Roselle region is seeing a an increase in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 7% rise in rent.
Compared to the rest of the Chicagoland market, the Roselle submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 6 listings have come on the market, which means office spaces 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 1,500 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this region were built in 2005 and are Class B.