Most listings are in the $20's per square foot per year. The Mundelein region is seeing a an increase in rates. In the last 3 months, the median rate went up $26 per sqft per year.
Compared to the rest of the Chicagoland market, the Mundelein region has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 9 listings have been made available, which means new listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 33% of the listings in the Mundelein 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.
The standard measurement for office space in this area is around 900 sqft. Most properties in this market are close to 1 floors. Most buildings in this region were built in 1987 and are Class B.