The deadly incident happened the night of Dec. 26 on Bogart Avenue. Kyle Chester De Los Reyes was arrested after authorities responded to the home.
De Los Reyes is now charged with three counts of murder, according to the Los Angeles County District Attorney's office. He faces special allegations of use of a deadly weapon and committing multiple murders.
He is being held without bail and is scheduled to be arraigned on Jan. 15.
Meanwhile, the exact relationship between the suspect and the victims remains unclear.
The Los Angeles County Medical Examiner identified the victims as Mia Chantelle Narvaez, 8; Paul Sebastian Manangan, 16; and Rona Nate, 44.
A motive for the deadly stabbings has not been determined.