The typical asking rate per listing is in the $20's per square foot per year. The Madison submarket is going through a a boost in rates. In the last 3 months, the median rate went up $7 per sqft per year. That's a 42% rise in rent.
In the last 90 days, 14 listings have come on the market, which means listings might be leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 7% of the listings in the Madison are subleases, so you will probably have to consider a longer term 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 3,750 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this market are close to 1 floors. Most buildings in this region were built in 2005 and are Class B.