The typical asking rate per listing is in the $10's per square foot per year. The Jefferson Park submarket is going through a a rise in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 4% increase in rent.
Compared to the rest of the Chicagoland market, the Jefferson Park region has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 3 listings have been listed, which means 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 9,000 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this market are approximately 1 stories. Most buildings in this area were built in 1950 and are Class A.