The original building, built in 1953 using military surplus paint, has been added onto throughout the years. The first addition in 1963 was built to house freshmen and sophomores. Later, a Field-house and Performing Arts center were added (1963 and 1979 respectively). A corridor connecting the cafeteria and the "B Building" was then added (this glass hallway is referred to as "the Breezeway"). A major addition, including a lecture hall was completed during the 2000-01 school year. Recently, a weight room was added during the 2009-2010 school year.
Lee's Summit is an A+ designated high school. LSHS has received prestigious honors, including the Missouri Gold Star School award for 3 years and a U.S. News & World Report "Best High School" in 2009, 2010, 2011 and 2012.[citation needed]
Lee's Summit High School has an Air Force Junior ROTC program, which has been awarded AFJROTC Distinguished Unit many times, most recent being the 2017-2018 school year. LSHS AFJROTC also has different types of activities such as Raider Team, Drill Team, and Honor Guard. The Honor Guard team has presented the colors in many NCAA Sport Tournaments, the 2016 Ringside World Boxing Championship, and recent NASCAR races.
