Developers are proposing a pair of unrelated new condo towers - Echo and Puerto Aventura - in the city of Aventura in Northeast Miami-Dade County, and in the process have boosted the total number of planned buildings to 81 in South Florida since the real estate crash began in 2007.

The proposed 11-story Echo project is slated to be developed on a vacant 6.5-acre site fronting the Intracoastal Waterway in the 3200 block of Northeast 188th Street, according to city of Aventura and Miami-Dade Property Appraiser records. Plans call for up to 190 units to be located across the street from the nine-year-old Aventura City Of Excellence School (ACES) charter program that boasts a student body of 1,000 children who are attending kindergarten through eighth grade, according to government records.

To the south of the proposed Echo project, a developer is proceeding with plans to build the 25-story Puerto Aventura project on the 2700 block of Northeast 185th Street, according to government records. Plans call for the Puerto Aventura project to feature 205 units just south of the Loehmann's Fashion Island retail center.

The site plan status for both proposed projects - Echo and the Puerto Aventura - are classified as in the "review process," according to government records last updated in October 2012. With the newly announced Echo and Puerto Aventura projects to be located just south of Aventura Mall, more than 11,675 condo residences have been proposed for the tri-county South Florida region of Miami-Dade, Broward, and Palm Beach counties as of Oct. 31, 2012.