An additional grade level was added each of three subsequent years until a four-year institution could be established.

A new facility was constructed at the corner of Goodchildren (which later became East Judge Perez) and Palmisano, and Chalmette Senior High moved there in 1962.

Seven students graduated with a high school diploma and an associate of applied science degree in petroleum Technology (PTEC) from Nunez Community College, and 270 graduates earned direct college credit through dual enrollment.

[7][8] As St. Bernard Parish started to repopulate, Chalmette High School joined LHSAA class 5A for the first time in its history for the 2007 football season, and rejoined the Catholic League.

[8] Motorola provided $50,000 to rebuild technology infrastructure in 2008, before the scheduled new campus was to open in 2009.

[9] In 2009, U.S. News magazine released its rankings of the best high schools in America, based on test scores and other factors.

Chalmette earned a bronze medal as one of 39 schools in Louisiana to make the list.

In 2013, the Owls joined district 8-5A consisting of mostly Jefferson Parish Public Schools.

[15] The Chalmette High School gymnasium was a setting for the 2006 film, Glory Road.