On average, listings lease in the $20's per square foot per year. The Darien submarket is seeing a a boost in rates. In the last 3 months, the median rate rose $22 per sqft per year.
Compared to the rest of the Chicagoland market, the Darien submarket has lower rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 5 listings have been posted online, which means leases might be going fast. You'll want to be prepared to tour spaces as quick as possible. About 120% of the listings in the Darien are subleases, so you might be able to snag a great spot on a short term. 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 500 sqft. Most properties in this region are close to 1 stories. Most buildings in this market were built in 1990 and are Class B.