The 22 year old will call Arden Street home after North Melbourne traded pick 35 for him in the National Draft.
Richardson was pre-listed by the Gold Coast and on-traded just a half an hour before the conclusion of trade week.
Named in the VFL team of the year, Richardson was invited to the 2010 draft combine where he pushed his case with recruiters.
North Melbourne coach Brad Scott said securing Richardson was exciting for the club.
"He'll play as a 23 year-old next year and we think he'll have an immediate impact.
"He's a 189 cm half back flanker and wingman. He's strong overhead and we think he can play a variety of roles.
"It's a great story. A year ago he was playing local footy in Ballarat and a year later he's on an AFL list."
