Most listings are in the $20's per square foot per year. The Northfield region is going through a a rise in rates. In the last 3 months, the median rate rose $29 per sqft per year.
Compared to the rest of the Chicagoland market, the Northfield region has higher rates, and you'll need to make a great offer to be in this hot submarket.
In the last 90 days, 0 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. About Inf% of the office spaces in the Northfield 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 810 sqft. Most properties in this area are close to 2 floors. Most buildings in this market were built in 1980 and are Class B.