On average, listings lease in the $20's per square foot per year. The Humboldt Park submarket is going through a decline in rates. In the last 3 months, the median rate fell $3 per sqft per year. That's a 11% decline in rent.
Compared to the rest of the Chicagoland market, the Humboldt Park submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 6 listings have been made available, 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 available, so finding a space for a small business might be tough.
Even though the median size is 5,100 sqft, there are still 0 spaces below 2,000 sqft. Most properties in this region are close to 3 floors. Most buildings in this area were built in 1950 and are Class B.