Early drafts included suicide pacts, school shootings, sex and drug addiction, a group of former abusers, and many other possible group ideas before teen therapy was chosen. Former titles include T-Doc, Buckle, Bingos, and Kill-Off.
The character of Cadence Thomas was written specifically for Dahlia Johnson after her audition. Originally, romance was supposed to ensue between Lark and Jude, but Cadence was written in as romantic fodder instead.
Nearly every single actor auditioned for a different character than they were cast in. Derick Trost, Ky Manzer, and Patrick Craig all auditioned before the character list has been announced (and therefore had no specific character in mind,) Dahlia Johnson and Casey Caplin both auditioned for the role of Wallace (Caplin also auditioned for Lark,) Camilla Ditton auditioned for Jude, Lyric Bowman auditioned for Amelia, and Tiana Jones, Davey, and Alison Doyle did not audition.
Cadence Elizabeth Thomas was named as a reference to the writer/creator, Lyric Elizabeth Bowman. Additionally, Lark's and Cadence's last names are Thomas and Jefferson, respectively, as a tongue-in-cheek nod to their destined relationship.
Quarters was originally scheduled for a fall 2015 release. However, after controversy erupted over the casting of Camilla Ditton, a cisgender female, as Jude Clarke, a trans male, the series was delayed. Rewrites occurred, and Ditton took on the role of Amelia, while Ky Manzer was cast as Jude.