On average, listings lease in the $20's per square foot per year. The Miami Gardens submarket is experiencing a decrease in rates. In the last 3 months, the median rate fell $5 per sqft per year. That's a 18% decrease in rent.
Compared to the rest of the Gold Coast market, the Miami Gardens submarket has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 2 listings have been made available, which means new availabilities most likley are going fast. 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 850 sqft. Most properties in this area are approximately 2 stories. Most buildings in this region were built in 1978 and are Class B.