Most listings are in the $20's per square foot per year. The Highland Park submarket is going through a a boost in rates. In the last 3 months, the median rate increased $2 per sqft per year. That's a 8% increase in rent.
Compared to the rest of the Chicagoland market, the Highland Park region has higher rates, and you'll need to make a great offer to be in this hot region.
In the last 90 days, 11 listings have been posted online, which means new availabilities are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 18% of the available leases in the Highland Park are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 1,550 sqft. Most properties in this market are close to 3 floors. Most buildings in this region were built in 1988 and are Class A.