In the last 90 days, 10 listings have been made available, which means spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 20% of the listings in the Aventura are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 12,000 sqft, there are still 0 leases below 2,000 sqft. Most properties in this market are close to 9 stories. Most buildings in this market were built in 1988 and are Class A.