In the last 90 days, 4 listings have been listed, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 100% of the office spaces in the Northbrook 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 on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 660 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this market were built in 1977.