Most listings are in the $10's per square foot per year. The Algonquin submarket is seeing a an increase in rates. In the last 3 months, the median rate increased $16 per sqft per year.
Compared to the rest of the Chicagoland market, the Algonquin submarket has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 6 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,900 sqft. Most properties in this market are around 1 floors. Most buildings in this region were built in 2004 and are Class A.