On average, listings lease in the $10's per square foot per year. The Waukesha region is going through a decline in rates. In the last 3 months, the median rate fell $7 per sqft per year. That's a 29% decrease in rent.
In the last 90 days, 8 listings have been posted online, which means listings might be going fast. You'll want to be prepared to tour spaces as quick as possible. About 100% of the office spaces in the Waukesha 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 1,330 sqft. Most properties in this market are approximately 1 stories. Most buildings in this area were built in 1983 and are Class B.