Most listings are in the $10's per square foot per year. The Brooklyn Park submarket is going through a a rise in rates. In the last 3 months, the median rate increased $4 per sqft per year. That's a 25% rise in rent.
In the last 90 days, 19 listings have been made available, which means leases 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 2,030 sqft. Most buildings in this region are around 1 stories. Most buildings in this region were built in 1986 and are Class B.