Most listings are in the $10's per square foot per year. The Detroit submarket is going through a decline in rates. In the last 3 months, the median rate decreased $2 per sqft per year. That's a 9% decrease in rent.
Compared to the rest of the Detroit market, the Detroit region has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 66 listings have been made available, so you'll want to check back regularly for new listings. 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 5,770 sqft, there are still 0 office spaces below 2,000 sqft. Most properties in this market are around 2 stories. Most buildings in this area were built in 1938 and are Class B.