On average, listings lease in the $20's per square foot per year. The Pewaukee submarket is going through a an increase in rates. In the last 3 months, the median rate went up $7 per sqft per year. That's a 37% increase in rent.
In the last 90 days, 8 listings have come on the market, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 13% of the available space in the Pewaukee 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.
Even though the median size is 3,540 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this market are close to 2 stories. Most buildings in this area were built in 1999 and are Class A.