Most listings are in the $10's per square foot per year. The Grand Rapids submarket is seeing a decline in rates. In the last 3 months, the median rate fell $6 per sqft per year. That's a 25% decrease in rent.
Compared to the rest of the Grand Rapids market, the Grand Rapids region has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 67 listings have been listed, so you'll want to check back regularly for new listings. About 3% of the listings in the Grand Rapids are subleases, so you will probably need to consider the implications of signing a direct lease with the building. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,400 sqft. Most buildings in this area are around 2 stories. Most buildings in this region were built in 1920 and are Class Class B.