On average, listings lease in the $10's per square foot per year. The Yorkville submarket is seeing a a boost in rates. In the last 3 months, the median rate rose $16 per sqft per year.
Compared to the rest of the Chicagoland market, the Yorkville submarket has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 8 listings have been made available, which means leases most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,920 sqft. Most buildings in this market are close to 2 stories. Most buildings in this market were built in 1995 and are Class A.