[1] It started operations in 1981 and ceased to exist in 2000, when it was merged with Westlake Secondary School to form Braddell-Westlake Secondary School The school was started in 1981 as a co-educational and English-medium school and it was officially opened by then-MP for Boon Teck Michael Liew Kok Pun on 28 April 1983.

It was housed in a S$6.65 million campus made out of two sunken courtyards and five blocks.

[2] The last graduating batch as Braddellites (which the students were commonly known as) was in 1999, after which they merged with Westlake Secondary School to form Braddell-Westlake Secondary School.

Braddell Secondary School's campus became Campus 1, housing upper secondary students.

Braddell-Westlake Secondary School's students and teachers were transferred to Guangyang Secondary School after closing down in 2005.