The typical asking rate per listing is in the $20's per square foot per year. The Northwest Side region is seeing a an increase in rates. In the last 3 months, the median rate rose $3 per sqft per year. That's a 13% increase in rent.
Compared to the rest of the Chicagoland market, the Northwest Side region has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 65 listings have been made available, so you'll want to check back regularly for new listings. About 3% of the available leases in the Northwest Side are subleases, so you will probably have to consider a longer term lease. 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 2,290 sqft. Most properties in this region are around 2 floors. Most buildings in this region were built in 1950 and are Class A.