Most listings are in the $10's per square foot per year. The Harper Woods region is experiencing a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 4% decrease in rent.
Compared to the rest of the Metro Detroit market, the Harper Woods submarket has less expensive rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 1 listings have come on the market, which means new availabilities 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 840 sqft. Most properties in this market are close to 1 stories. Most buildings in this market were built in 1955 and are Class B.