Most listings are in the $20's per square foot per year. The Darien submarket is seeing a an increase in rates. In the last 3 months, the median rate rose $20 per sqft per year. That's a Inf% rise in rent.
Compared to the rest of the Chicagoland market, the Darien region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 2 listings have been posted online, which means leases most likley are leasing quickly. 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.
Even though the median size is 21,050 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this region are around 2 stories. Most buildings in this region were built in 1990 and are Class B.