On average, listings lease in the $20's per square foot per year. The Madison region is experiencing a a boost in rates. In the last 3 months, the median rate increased $22 per sqft per year.
In the last 90 days, 95 listings have been listed, so you'll want to check back regularly for new listings. About 145% of the available space in the Madison are subleases, so you might be able to snag a great spot on a short term. 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 2,100 sqft. Most properties in this area are around 2 stories. Most buildings in this region were built in 1988 and are Class B.