It moved a year later to the present site of The Bush School in Washington Park.

[5] Additional buildings were opened during the 1930s despite low enrollment and mounting debt during the Great Depression; several were later named for students who had died during their World War II military service.

[5] Lakeside adopted stricter academic requirements for admissions in the 1950s and launched a zero-fee summer educational program in 1965 with Seattle Public Schools.

[9] Lakeside's athletic program offers golf, football, soccer, volleyball, crew, wrestling, baseball, basketball, ultimate frisbee, tennis, swimming, diving, cross country, and track and field as well as a strength and conditioning program.

The 2016 volleyball team won the 3A WIAA state championship for the first time in school history.