Houses for sale in South Florida take longer to sell than anywhere else in the country, an average of 156 days, according to a recent report. The Miami-Dade, Broward and Palm Beach counties region topped survey results from Altos Research and Real IQ. During the housing boom of 2000 to 2005, a few weeks was a long time on the market — many houses sold within days. South Florida saw an increase in average days on the market to 154 in June from 152 in May. There were 48,362 for sale in July, down from 48,662 in June and 48,949 in May.