The typical asking rate per listing is in the $40's per square foot per year. The Birmingham submarket is going through a a boost in rates. In the last 3 months, the median rate rose $0 per sqft per year. That's a 1% increase in rent.
Compared to the rest of the Metro Detroit market, the Birmingham submarket has greater rates, and you'll need to make a great offer to be in this hot region.
In the last 90 days, 21 listings have been made available, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 5% of the office spaces in the Birmingham are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 7,660 sqft, there are still 0 office spaces below 2,000 sqft. Most properties in this area are around 2 floors. Most buildings in this area were built in 1970 and are Class B.