The typical asking rate per listing is in the $20's per square foot per year. The Deerfield submarket is going through a a rise in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 13% rise in rent.
Compared to the rest of the Chicagoland market, the Deerfield region has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 17 listings have been listed, which means spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 65% of the office spaces in the Deerfield are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 4,840 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this region are around 4 floors. Most buildings in this region were built in 1986 and are Class A.