The typical asking rate per listing is in the $40's per square foot per year. The Miami-Dade County submarket is seeing a an increase in rates. In the last 3 months, the median rate went up $8 per sqft per year. That's a 23% rise 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 5% of the available leases in the Miami-Dade County are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,990 sqft. Most properties in this region are around 3 floors. Most buildings in this region were built in 1982 and are Class A.