Most listings are in the $20's per square foot per year. The Gurnee submarket is going through a a rise in rates. In the last 3 months, the median rate went up $22 per sqft per year. That's a Inf% increase in rent.
Compared to the rest of the Chicagoland market, the Gurnee submarket has smaller rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 11 listings have come on the market, which means new availabilities 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 on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,850 sqft. Most properties in this area are close to 3 stories. Most buildings in this area were built in 1996 and are Class B.