In June, Miami-Dade County witnessed the biggest number of residential transactions in a single month in over 30 years, signaling rising demand for South Florida real estate. According to the latest Miami Realtors Association sales, Miami-Dade had 4,057 condo and single-family home sales. Since the association began recording sales activity in 1993, this is the most sales the county has seen in a single month.  See how Miami ranks to other to other US cities real estate here