Most listings are in the $20's per square foot per year. The Gurnee region is seeing a a rise in rates. In the last 3 months, the median rate increased $3 per sqft per year. That's a 14% increase in rent.
Compared to the rest of the Chicagoland market, the Gurnee submarket has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 19 listings have been posted online, 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 1,550 sqft. Most properties in this market are close to 3 stories. Most buildings in this region were built in 1994 and are Class A.