On average, listings lease in the $20's per square foot per year. The Wausau region is going through a a rise in rates. In the last 3 months, the median rate increased $21 per sqft per year.
In the last 90 days, 3 listings have been listed, which means leases are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 100% of the office spaces in the Wausau 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 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 2,330 sqft. Most properties in this area are approximately 1 stories. Most buildings in this area were built in 1983 and are Class B.