On average, listings lease in the $0's per square foot per year. The Miami Gardens submarket is going through a decrease in rates. In the last 3 months, the median rate fell $28 per sqft per year. That's a 100% decline in rent.
In the last 90 days, 19 listings have been made available, which means new listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 sqft. Most buildings in this market are around 2 stories. Most buildings in this area were built in 1978 and are Class B.