Most listings are in the $20's per square foot per year. The Northwest Side submarket is going through a a boost in rates. In the last 3 months, the median rate went up $4 per sqft per year. That's a 20% rise in rent.
Compared to the rest of the Chicagoland market, the Northwest Side region has smaller rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 65 listings have been posted online, so you'll want to check back regularly for new listings. 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 3,480 sqft, there are still 0 office spaces below 2,000 sqft. Most properties in this area are close to 2 stories. Most buildings in this market were built in 1950 and are Class A.