Most listings are in the $10's per square foot per year. The Center Line region is going through a a rise in rates. In the last 3 months, the median rate went up $16 per sqft per year.
Compared to the rest of the Metro Detroit market, the Center Line region has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 2 listings have been posted online, which means office spaces most likley are leasing quickly. 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.
The standard measurement for office space in this area is around 1,160 sqft. Most buildings in this area are approximately 1 floors. Most buildings in this market were built in 1965 and are Class Class B.