Most listings are in the $20's per square foot per year. The Madison submarket is seeing a an increase in rates. In the last 3 months, the median rate went up $22 per sqft per year.
In the last 90 days, 1 listings have come on the market, which means listings are probably going fast. You'll want to be prepared to make an offer immediately. About 200% of the available space in the Madison 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 posted, so finding a space for a small business might be tough.
Even though the median size is 6,320 sqft, there are still 0 new listings below 2,000 sqft. Most properties in this area are approximately 1 stories. Most buildings in this area were built in 0 and are Class Class A.