Most listings are in the $20's per square foot per year. The Warren region is going through a a rise in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 4% increase in rent.
Compared to the rest of the Metro Detroit market, the Warren region has smaller rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 28 listings have been made available, which means office spaces 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 2,910 sqft, there are still 0 new availabilities below 2,000 sqft. Most properties in this region are around 1 floors. Most buildings in this region were built in 1970 and are Class B.