On average, listings lease in the $40's per square foot per year. The Miami-Dade County submarket is going through a decrease in rates. In the last 3 months, the median rate fell $4 per sqft per year. That's a 9% decrease in rent.
In the last 90 days, 362 listings have been made available, so you'll want to check back regularly for new listings. About 132% of the listings in the Miami-Dade County are subleases, so you might be able to find a shorter term or below market rent. 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 1,890 sqft. Most buildings in this area are close to 3 stories. Most buildings in this area were built in 1982 and are Class A.