In a motion document submitted Wednesday, the attorneys for Dimitrios Pagourtzis made a request for the bond after he was initially given no bond when he was booked into Galveston County Jail.
His attorneys said their client has a "constitutional right" to bail, as well as the means to post it through his family.
RELATED: Santa Fe gunman repeated 'another one bites the dust' amid carnage, survivor says
Pagourtzis was arrested for capital murder after the massacre that left eight students and two teaching staff members dead. Thirteen other people were wounded from the deadliest school shooting in Texas history.
Authorities said Pagourtzis allegedly used a shotgun and a revolver owned by his father in the rampage targeted at his classmates.
Meanwhile, Santa Fe High School staff returned to the campus Wednesday. Students are expected to come back for regularly scheduled classes on Tuesday, May 29.