Compared to the rest of the Chicagoland market, the Northbrook submarket has smaller rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 30 listings have come on the market, which means office spaces are probably going fast. You'll want to be prepared to make an offer immediately. 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 2,250 sqft. Most buildings in this area are around 4 floors. Most buildings in this area were built in 1980 and are Class A.