On average, listings lease in the $50's per square foot per year. The Aventura region is going through a a boost in rates. In the last 3 months, the median rate went up $58 per sqft per year.
Compared to the rest of the Gold Coast market, the Aventura region has higher rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 10 listings have been posted online, which means office spaces most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 40% of the office spaces in the Aventura 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.
Even though the median size is 2,900 sqft, there are still 0 office spaces below 2,000 sqft. Most properties in this market are approximately 9 stories. Most buildings in this market were built in 1988 and are Class A.