On average, listings lease in the $10's per square foot per year. The Detroit region 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% decline in rent.
Compared to the rest of the Detroit market, the Detroit submarket has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 63 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 6,340 sqft, there are still 0 listings below 2,000 sqft. Most properties in this area are around 2 stories. Most buildings in this market were built in 1937 and are Class B.