On average, listings lease in the $60's per square foot per year. The DePaul region is seeing a a rise in rates. In the last 3 months, the median rate went up $25 per sqft per year. That's a 67% increase in rent.
Compared to the rest of the Chicagoland market, the DePaul region has greater rates, and you'll need to pay a premium to be in this hot region.
In the last 90 days, 4 listings have been listed, which means leases 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 170 sqft. Most properties in this market are close to 3 stories. Most buildings in this region were built in 1927 and are Class C.