Most listings are in the $10's per square foot per year. The Allen Park region is going through a an increase in rates. In the last 3 months, the median rate increased $16 per sqft per year.
Compared to the rest of the Metro Detroit market, the Allen Park submarket has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 6 listings have been posted online, which means leases most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. 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 4,750 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this market are close to 1 floors. Most buildings in this area were built in 1969 and are Class C.