The typical asking rate per listing is in the $20's per square foot per year. The Oak Creek submarket is going through a a rise in rates. In the last 3 months, the median rate went up $9 per sqft per year. That's a 64% increase in rent.
Compared to the rest of the Milwaukee County market, the Oak Creek submarket has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 9 listings have come on the market, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 9,750 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this region were built in 1998 and are Class A.