CLEVELAND District State High School's multi-million dollar Paul Bancroft Centre was officially opened at a ceremony on Tuesday.
Mr Bancroft, Cleveland District State High School executive principal, said the state government had contributed $6 million to the project as part of the $200 million Advancing Queensland Schools funding package.
Further funds were raised by the school community.
"We are so fortunate to have a strong and supportive community in the Redlands," he said.
"This building (is a) measure of the success of this school."
The opening had been a long time in the making, he said.
Before the Paul Bancroft Centre was built, the 2000-student school was using the 400-seat Smith Street hall and an outdoor undercover area within the school to hold school assemblies and events.
Mr Bancroft said the new building would accommodate health and physical education lessons, sport matches and music, dance and drama performances.
It would also be offered as a home for community groups.
"We're a community school and we need to ensure the hall is available for use by the community," he said.
Mr Bancroft, who has been the school's principal since 1990, was awarded a Medal of the Order of Australia in 2014 for service to education, sport and professional organisations.
He oversaw Cleveland District State High School's move to become an Independent Public School in 2013 and introduced international education programs to the school.
In 2017, Mr Bancroft won the Griffith University Jack Pizzey award, given out each year by Education Queensland for its best principal.